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01-ATM Commands

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ATM configuration commands

atm-link check

Syntax

atm-link check

undo atm-link check

View

ATM P2P subinterface view

Default level

2: System level

Parameters

None

Description

Use the atm-link check command to make the protocol state of the current ATM P2P subinterface adaptive to the protocol state of the PVC configured on the subinterface in addition to the state of the physical interface. Thus, the protocol state of the subinterface is up only when both the physical interface and the PVC configured on the subinterface are up. Otherwise, the protocol state of the subinterface is down.

Use the undo atm-link check command to restore the default.

By default, the protocol of the ATM P2P subinterface goes up or comes down depending on the state of the physical interface.

This command applies only to ATM P2P subinterfaces.

Examples

# Enable the protocol state of ATM P2P subinterface ATM 3/1/1.1 to change depending on the protocol state of the physical interface and the protocol state of the PVCs configured on the subinterface.

<Sysname> system-view

[Sysname] interface Atm 3/1/1.1 p2p

[Sysname-Atm3/1/1.1] atm-link check

clock

Syntax

clock { master | slave }

undo clock

View

ATM interface view

Default level

2: System level

Parameters

master: Specifies the internal transmission clock (the master clock mode).

slave: Specifies the line clock (the slave clock mode).

Description

Use the clock command to specify the clock signal to be adopted by the current ATM interface.

Use the undo clock command to restore the default.

By default, an ATM interface uses line clock signal (slave).

When two routers are connected back-to-back through ATM interfaces, you must configure the clock mode to master on one side and to slave on the other side.

NOTE:

· To have an ATM interface work in master clock mode, make sure that the clock modes of all the ATM interfaces sharing the same slot are set to master.

· The effect of this command applies to both ATM main interface and subinterface. However, the command is available only in ATM main interface view.

Related commands: display atm interface.

Examples

# Specify interface ATM 3/1/1 to operate in master clock mode.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] clock master

display atm interface

Syntax

display atm interface [ atm { interface-number | interface-number.subnumber } ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

interface-number: Number of an ATM main interface.

interface-number.subnumber: Number of an ATM subinterface, in the range of 0 to 1023. interface-number is the number of the ATM main interface.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display atm interface command to display the detailed information of the specified ATM main interface or subinterface or all ATM interfaces if no ATM interface is specified.

Examples

# Display the information of interface ATM 3/1/1.

<Sysname> display atm interface Atm 3/1/1

ATM interface Atm3/1/1, State UP

Port Information:

Maximum VCs: 1024

PVCs: 5, MAPs: 1

input pkts: 0, input bytes: 0, input pkt errors: 0

output pkts: 0, output bytes: 0, output pkt errors: 0

Main interface Information:

PVCs: 4, MAPs: 1

input pkts: 0, input bytes: 0, input pkt errors: 0

output pkts: 0, output bytes: 0, output pkt errors: 0

ATM interface Atm3/1/1.1, point-to-point, State UP

Subinterface Information:

PVCs: 1, MAPs: 0

input pkts: 0, input bytes: 0, input pkt errors: 0

output pkts: 0, output bytes: 0, output pkt errors: 0

Table 1 Output description

Field	Description
ATM interface Atm3/1/1, State UP	Name and state of the ATM interface
Port Information	Information of the ATM interface
Maximum VCs	Maximum number of VCs that can be created on the ATM interface
PVCs	Total number of PVCs configured on the ATM interface, its main interface, or each subinterface
MAPs	Number of mappings on the interface, its main interface, or each subinterface
input pkts: 0, input bytes: 0, input pkt errors: 0	Received packets, bytes, and errors
output pkts: 0, output bytes: 0, output pkt errors: 0	Transmitted packets, bytes, and errors
Main interface Information	Information of the main interface of the ATM interface
ATM interface Atm3/1/1.1, point-to-point, State UP	Name, type and state of a subinterface on the main interface
Sub-interface Information	Information of the subinterface

display atm map-info

Syntax

display atm map-info [ interface atm { interface-number | interface-number.subnumber } [ pvc { pvc-name [ vpi/vci ] | vpi/vci } ] ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

interface-number: Number of an ATM main interface.

interface-number.subnumber: Number of an ATM subinterface, in the range of 0 to 1023. interface-number is the number of the ATM main interface.

pvc-name: PVC name, a unique case-insensitive string of 1 to 16 characters on the specified ATM interface. The name cannot be the same as any valid VPI/VCI pair. For example, the name 1/20 is not allowed.

vpi/vci: VPI/VCI pair. VPI is short for virtual path identifier; its value ranges from 0 to 255. VCI is short for virtual channel identifier; its value ranges from 0 to 1023. Because VCIs from 0 to 31 are reserved for special purposes, do not use them in normal cases.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display atm map-info command to display the PVC mappings on the specified ATM main interface, subinterface, PVC, or all ATM interfaces if no interface is specified.

Examples

# Display the PVC mappings on all ATM interfaces.

<Sysname> display atm map-info

Atm3/1/1, PVC 10/47, ETH, Virtual-Ethernet3/0/1, UP

Atm3/1/1, PVC 10/48, ETH, Virtual-Ethernet3/0/1, UP

Atm3/1/2, PVC 10/100, IP, State UP

100.11.1.1, vlink 327752

Table 2 Output description

Field	Description
ATM3/1/1	Interface number
PVC 10/47	PVC identifier
IP/ETH	Protocol type
State	PVC state
100.11.1.1	Protocol address
vlink 327752	Virtual link number

display atm pvc-info

Syntax

display atm pvc-info [ interface atm { interface-number | interface-number.subnumber } [ pvc { pvc-name [ vpi/vci ] | vpi/vci } ] ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

interface-number: Specifies the number of an ATM main interface.

interface-number.subnumber: Number of an ATM subinterface, in the range of 0 to 1023. interface-number is the number of the ATM main interface.

vpi/vci: VPI/VCI pair. VPI is short for virtual path identifier; its value ranges from 0 to 255. VCI is short for virtual channel identifier; its value ranges from 0 to 1023. As VCIs from 0 to 31 are reserved for special purposes, do not use them in normal cases.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display atm pvc-info command to display information about PVCs for the specified ATM main interface, subinterface, PVC, or all ATM interfaces if no ATM interface is specified.

Examples

# Display the PVC information on all ATM interfaces.

<Sysname> display atm pvc-info

--------|---------|-----------|--------|--------|------|----------

1/32 |UP |toBeijing |0 |SNAP |IP |Atm3/1/1 (UP)

1/33 |UP |toShanghai |1 |SNAP |None |Atm3/1/1 (UP)

1/55 |UP |toDatacomm |2 |SNAP |ETH |Atm3/1/1.1 (UP)

2/66 |UP | |3 |SNAP |IP |Atm3/1/1.4 (UP)

2/101 |UP | |4 |SNAP |ETH |Atm3/1/1.2 (UP)

Table 3 Output description

Field	Description
VPI/VCI	VPI/VCI pair
STATE	PVC state
PVC-NAME	PVC name
INDEX	Internal index of the PVC
ENCAP	AAL5 encapsulation type of the PVC
PROT	Upper protocol running on the PVC
INTERFACE	Interface the PVC belongs to

# Display information about a specified ATM PVC.

<Sysname> display atm pvc-info interface Atm 3/1/1 pvc 1/100

Atm3/1/1, VPI: 1, VCI: 100, INDEX: 0

AAL5 Encaps: SNAP, Protocol: IP

Service-type: CBR, output-pcr: 200 kbps, CDVT: 500 us

OAM interval: 0 sec(disabled), OAM retry interval: 1 sec

OAM retry count (up/down): 3/5

OAM ais-rdi count (up/down): 3/1

input pkts: 0, input bytes: 0, input pkt errors: 0

output pkts: 0, output bytes: 0, output pkt errors: 0

Interface State: UP, OAM State: UP, PVC State: UP

OAM cells received: 42

F5 InEndloop: 0, F5 InAIS: 42, F5 InRDI: 0

OAM cells sent: 0

F5 OutEndloop: 0

OAM cell drops: 0

OAM CC State: No CC Alarm

Table 4 Output description

Field	Description
VPI	The virtual path identifier of the specified ATM PVC.
VCI	The virtual channel identifier of the specified ATM PVC.
INDEX	Internal index of the PVC.
AAL5 Encaps	AAL5 encapsulation type of the PVC.
Protocol	Upper layer protocol running on the PVC.
Service-type	Service type.
OAM interval	Interval at which OAM F5 loopback cells are sent.
OAM retry interval	Interval at which the system retransmits OAM F5 loopback cells.
OAM retry count	Number of OAM cells transmitted before a PVC is declared up or down.
OAM ais-rdi count	Number of OAM AIS/RDI cells for the router to receive before reporting that the PVC is down; number of seconds for the router to wait before reporting that the PVC is up after the PVC has stopped receiving OAM AIS/RDI cells.
input pkts:	Count of received packets.
input bytes:	Count of received bytes.
input pkt errors:	Count of received error packets.
output pkts	Count of transmitted packets.
output bytes	Count of transmitted bytes.
output pkt errors	Count of transmitted error packets.
Interface State	Link layer protocol status of the interface.
OAM State	OAM status.
PVC State	PVC status.
OAM cells received	Count of received OAM cells.
F5 InEndloop	Count of received F5 loopback cells.
F5 InAIS	Count of received AIS cells. If the AIS alarm state is not supported, this command displays only the count of AIS cells, not the AIS alarm state, that is, the OAM AIS State field.
F5 InRDI	Count of received RDI cells. If the RDI alarm state is not supported, this command displays only the count of RDI cells, not the RDI alarm state, that is, the OAM RDI State field.
OAM cells sent	Count of transmitted OAM cells.
F5 OutEndloop	Count of transmitted F5 loopback cells.
OAM AIS State	AID alarm state. If the AIS alarm state is supported, this command displays only the AIS alarm state, not the count of received AIS cells, that is, the F5 InAIS field.
OAM RDI State	If the RDI alarm state is supported, this command displays only the RDI alarm state, not the count of received RDI cells, that is, the F5 InRDI field.
OAM cell drops	Count of dropped OAM cells.
OAM CC State	OAM CC alarm state: · A dash (–)—The system does not support obtaining OAM CC state. · No CC Alarm—No OAM CC alarm is present. · E2E CC Alarm—An end-to-end OAM CC alarm is present. · SEG CC Alarm—A segment OAM CC alarm is present (currently not supported).

display interface atm

Syntax

display interface atm [ interface-number | interface-number.subnumber ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

interface-number: Specifies the number of an ATM main interface.

subnumber: Specifies the number of an ATM subinterface, in the range of 0 to 1023. It is separated from the main interface by a dot (.).

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display interface atm command to display the configuration and state information of the specified ATM interface or all ATM interfaces if no interface is specified.

Examples

# Display the configuration and state information of interface ATM 4/1/2.

<Sysname> display interface Atm 4/1/2

Atm4/1/2 current state: UP

Line protocol current state: UP

Description: Atm4/1/2 Interface

The Maximum Transmit Unit is 1200

Internet protocol processing : disabled

AAL enabled: AAL5, Maximum VCs: 1024

Current VCs: 100 (0 on main interface)

Current VPs: 0 (0 on main interface)

Port connector type is OC3/STM_1_SR_SFP

Physical layer is packet over SDH

Port speed type: STM-1

Loopback is not set

Clock source: Slave

Clock grade: Quality unknown(existing synchronization network)

SPE scrambling: Enable

BER thresholds:

SD: 10e-6 SF: 10e-3

Regenerator section layer:

J0(TX): "h3c"

68 33 63 00 00 00 00 00 00 00 00 00 00 00 00 00

J0(RX): "h3c"

68 33 63 00 00 00 00 00 00 00 00 00 00 00 00 00

Alarm: NONE

Error: 0 BIP(B1)

Multiplex section layer:

Alarm: NONE

Error: 0 BIP(B2), 0 REI(M1)

Higher order path layer:

C2(TX): 0x13 C2(RX): 0x13

J1(TX): "h3c"

68 33 63 00 00 00 00 00 00 00 00 00 00 00 00 00

J1(RX): "h3c"

68 33 63 00 00 00 00 00 00 00 00 00 00 00 00 00

Alarm: NONE

Error: 0 BIP(B3), 0 REI(G1)

0 PJE, 0 NJE

Last 300 seconds input: 57615 packets/s, 6387965 bytes/s

Last 300 seconds output: 46113 packets/s, 8852949 bytes/s

Input : 184384723 packets, 18819825504 bytes, 0 buffers

0 errors, 0 crcs, 0 lens, 0 giants,

0 pads, 0 aborts, 0 timeouts,

0 overflows, 0 overruns, 0 no buffer

Output: 60804502 packets, 11674011408 bytes, 0 buffers

0 errors, 0 overflows, 0 underruns

Peak value of input: 0 bytes/sec, at 2010-12-27 06:15:45

Peak value of output: 0 bytes/sec, at 2010-12-27 06:15:45

Table 5 Output description

Field	Description
Atm4/1/2 current state	Physical state of the interface
Line protocol current state	Link layer state of the interface
AAL enabled: AAL5, Maximum VCs: 1024	AAL type and the maximum number of VCs allowed on the interface
Current VCs	VCs configured on the interface
Current VPs	VPs configured on the interface
Port connector type	Optical module type of the interface
Physical layer	Framing format of the interface
Port speed type	Transmission rate of the interface
Loopback	Loopback mode of the interface
Clock Source	Clock mode of the interface
Clock grade	Clock grade of the interface
SPE scrambling	Scrambling mode of the interface
BER thresholds	Signal degrade (SD) alarm threshold and signal fail (SF) alarm threshold of the interface
J0(Rx)	J0 overhead byte expected to receive on the interface
J0(Tx)	J0 overhead byte transmitted by the interface
J1(Rx)	J1 overhead byte expected to receive on the interface
J1(Tx)	J1 overhead byte transmitted by the interface
C2(RX)	C2 overhead byte expected to receive on the interface
C2(TX)	C2 overhead byte transmitted by the interface
Regenerator section layer:	Alarm and error statistics of the regenerator section
Multiplex section layer:	Alarm and error statistics of the multiplex section
Higher order path layer:	Alarm and error statistics of the high order path
Alarm	Alarm statistics
Error	Error statistics
Peak value of input	Peak value of packets received on the interface
Peak value of output	Peak value of packets transmitted on the interface

eoapad enable

Syntax

eoapad enable

undo eoapad enable

View

ATM main interface view

Default level

2: System level

Parameters

None

Description

Use the eoapad enable command to enable Ethernet packet padding on an ATM interface.

Use the undo eoapad enable command to disable the function.

By default, Ethernet packet padding is disabled.

When you enable this function on an ATM interface, the interface fills in a sent EoA packet to 60 bytes if the packet (including the frame header) is smaller than 60 bytes.

Examples

# Enable Ethernet packet padding on interface ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] eoapad enable

NOTE:

This command is also enabled on the ATM subinterfaces when it is enabled on the ATM main interface.

flag

Syntax

flag c2 flag-value

undo flag c2

flag { j0 | j1 } { sdh | sonet } flag-value

undo flag { j0 | j1 } { sdh | sonet }

View

ATM main interface view

Default level

2: System level

Parameters

c2 flag-value: Path signal flag byte, a higher-order path overhead byte that indicates the multiplex structure of virtual container (VC) frames and property of payload. It is a hexadecimal number in the range of 0 to FF.

j0 flag-value: Regeneration section trace message, a section overhead byte that tests continuity of the connection between two interfaces at the section level. If the sdh keyword is configured, the flag-value argument is a string of 1 to 15 hexadecimal digits. If the sonet keyword is configured, the argument is a hexadecimal number in the range of 0 to FF.

j1 flag-value: Path trace message, a higher-order path overhead byte that tests continuity of the connection between two interfaces at the path level. If the sdh keyword is configured, the flag-value argument is a string of 1 to 15 hexadecimal digits. If the sonet keyword is configured, the argument is a string of 1 to 62 characters.

sdh: Sets framing format to Synchronous Digital Hierarchy (SDH).

sonet: Sets framing format to Synchronous Optical Network (SONET).

Description

Use the flag command to set the SONET/SDH overhead bytes.

Use the undo flag command to restore the default.

By default, the default SDH overhead bytes are used.

The default overhead bytes are as follows.

· c2: 0x13

· j0 (SDH): Null

· j1 (SDH): Null

Inconsistency between the c2 and j1 settings of the sending end and those of the receiving end causes alarms.

The j0 byte can be any character in the network of the same carrier. If networks of two carriers are involved, the sending and receiving routers at network borders must use the same j0 byte. With the j0 byte, operators can detect and troubleshoot faults in advance or use less time to recover the networks.

The inconsistent j0 byte settings at the sending and receiving ends cause alarms in SDH frames but do not in SONET frames.

Examples

# Set the SDH overhead byte J0 of ATM interface ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] flag j0 sdh ff

frame-format

Syntax

frame-format { sdh | sonet }

undo frame-format

View

ATM main interface view

Default level

2: System level

Parameters

sdh: Sets the framing format to SDH STM-1/STM-4.

sonet: Sets the framing format to SONET OC-3/OC-12.

Description

Use the frame-format command to set the framing format for an ATM interface.

Use the undo frame-format command to restore the default.

By default, the framing format of an ATM interface is SDH STM-1/STM-4.

Examples

# Set the framing format of ATM 3/1/1 to SONET OC-3/OC-12.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] frame-format sonet

interface atm

Syntax

interface atm { interface-number | interface-number.subnumber [ p2mp | p2p ] }

undo interface atm interface-number.subnumber

View

System view

Default level

2: System level

Parameters

interface-number: ATM main interface number.

subnumber: ATM subinterface number, in the range of 0 to 1023.

p2mp: Sets the connection type of the subinterface to point-to-multipoint (P2MP).

p2p: Sets the connection type of the subinterface to point-to-point (P2P).

Description

Use the interface atm command to create an ATM subinterface or enter an ATM subinterface view.

Use the undo interface atm command to delete an ATM subinterface.

Be default, the connection type of an ATM subinterface is P2MP.

NOTE:

On a P2MP ATM subinterface, you can create multiple PVCs. On a P2P ATM subinterface, you can create only one PVC.

Examples

# Enter the view of interface ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1]

# Create and enter the view of subinterface ATM 3/1/1.1, and set its connection type to P2P.

<Sysname> system-view

[Sysname] interface Atm 3/1/1.1 p2p

[Sysname-Atm3/1/1.1]

loopback

Syntax

loopback { cell | local | remote }

undo loopback

View

ATM main interface view

Default level

2: System level

Parameters

cell: Enables internal cell loopback testing.

local: Enables internal loopback testing.

remote: Enables external loopback testing.

Description

Use the loopback command to enable a specific type of loopback testing on an ATM interface.

Use the undo loopback command to disable the loopback testing that is being performed.

By default, loopback testing is disabled.

Internal loopback or external loopback is designed only for test purposes. Do not enable loopback testing on an interface operating normally.

Examples

# Enable internal loopback testing on ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] loopback local

map bridge

Syntax

map bridge { virtual-ethernet | ve-bridge } interface-number

undo map bridge

View

PVC view

Default level

2: System level

Parameters

interface-number: Virtual Ethernet (VE) or VE-bridge interface number.

Description

Use the map bridge command to map the current PVC to the specified VE or VE-bridge interface for IPoEoA or EoA.

Use the undo map bridge command to remove the mapping.

By default, no PVC mapping is configured.

When using this command, make sure that the VE or VE-bridge interface has been created.

Examples

The following examples demonstrate a complete process of IPoEoA configuration.

# Create a VE interface Virtual-Ethernet 3/0/1.

<Sysname> system-view

[Sysname] interface Virtual-Ethernet 3/0/1

# Assign IP address 10.1.1.1/16 to the VE interface.

[Sysname-Virtual-Ethernet3/0/1] ip address 10.1.1.1 255.255.0.0

[Sysname-Virtual-Ethernet3/0/1] quit

# Create PVC 1/102 on the ATM interface ATM 3/1/1.

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc 1/102

# Map the PVC to the VE interface.

[Sysname-atm-pvc-Atm3/1/1-1/102] map bridge Virtual-Ethernet 3/0/1

map ip

Syntax

map ip { ip-address | default | inarp [ minutes ] } [ broadcast ]

undo map ip { ip-address | default | inarp }

View

PVC view

Default level

2: System level

Parameters

ip-address: Remote IP address mapped to the current PVC.

default: Sets the default PVC mapping. If no PVC mapping can be found for the next hop address of a packet, the packet will be sent from the PVC in the default PVC mapping.

inarp: Enables inverse address resolution protocol (InARP) on the current PVC.

minutes: Sets the interval in minutes for sending InARP packets. The value ranges from 1 to 600 and defaults to 15.

broadcast: Enables pseudo-broadcast. If the mapping of a PVC is configured with pseudo-broadcast, the router sends on the PVC a copy of each broadcast or multicast packet that it sends out the interface to which the PVC belongs.

You must configure the broadcast keyword on an ATM PVC where broadcast or multicast packets must be sent, for example, to allow PIM multicast to create neighbor relationship with the router connected using the ATM interface.

Description

Use the map ip command to create an IPoA mapping for the PVC.

Use the undo map ip command to delete the mapping.

By default, no IPoA mapping is configured. If a mapping is configured, pseudo-broadcast is not supported by default.

Examples

# Create a static IPoA mapping for PVC 1/32, specifying the opposite IP address to 61.123.30.169 and supporting pseudo-broadcast.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc 1/32

[Sysname-atm-pvc-Atm3/1/1-1/32] map ip 61.123.30.169 broadcast

# Enable InARP on PVC 1/33 and send InARP packets every 10 minutes.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc 1/33

[Sysname-atm-pvc-Atm3/1/1-1/33] map ip inarp 10

mtu

Syntax

mtu mtu-number

undo mtu

View

ATM interface view

Default level

2: System level

Parameters

mtu-number: MTU size in bytes on the current ATM interface, in the range of 128 to 2000.

Description

Use the mtu command to set the size of maximum transmission unit (MTU) on the current ATM interface.

Use the undo mtu command to restore the default.

By default, the MTU of an ATM interface is 1500 bytes.

NOTE:

You can configure this command in either ATM main interface view or ATM subinterface view. The command takes effect only on the configured interface or subinterface.

Examples

# Set the MTU to 1492 bytes for interface ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] mtu 1492

oam cc end-to-end

Syntax

oam cc end-to-end { both | sink | source }

undo oam cc end-to-end { both | sink | source }

View

PVC view

Default level

2: System level

Parameters

both: Enables the PVC as both the continuity check (CC) cell source and the CC cell sink, that is, the receiver.

sink: Enables the PVC as the CC cell sink to receive and process CC cells.

source: Enables the PVC as the CC cell source to generate CC cells.

Description

Use the oam cc end-to-end command to enable the OAM continuity check (CC) function on the current PVC.

Use the undo oam cc end-to-end command to disable the OAM CC function on the current PVC.

By default, OAM CC is disabled.

When you configure OAM CC on a PVC, configure one end of the PVC as the CC cell source and the other end as the CC cell sink.

On an OAM CC-enabled PVC, if the detecting end fails to receive CC cells within 3 seconds, the state of the PVC changes to down and will change to up only after CC cells or packets are received again.

When disabling OAM CC on a PVC, make sure that the role of the PVC in continuity check is the same as the one that has been enabled. For example, if you have enabled the PVC as both the CC cell source and the sink, you should perform the undo oam cc end-to-end both command rather than the undo oam cc end-to-end sink command to disable the function.

This command cannot be configured on the member PVCs in a PVC group.

Examples

# Enable OAM CC.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc 1/32

[Sysname-atm-pvc-Atm3/1/1-1/32] oam cc end-to-end sink

oam frequency

Syntax

oam frequency frequency [ up up-count down down-count retry-frequency retry-frequency ]

undo oam frequency

View

PVC view

Default level

2: System level

Parameters

frequency: Interval in seconds for sending OAM F5 Loopback cells, in the range of 0 to 600. When the interval is set to 0, no OAM F5 loopback cells are sent.

up up-count: Specifies that the PVC goes up when the number of successive OAM F5 loopback cells received correctly reaches the value specified by the up-count argument. The value range for the up-count argument is 1 to 600, and the default is 3.

down down-count: Specifies that the PVC goes down when the number of successive OAM F5 loopback cells that it fails to receive reaches the value specified by the down-count argument. The value range for the down-count argument is 1 to 600, and the default is 5.

retry-frequency retry-frequency: Specifies the interval (in seconds) at which OAM F5 loopback cells should be transmitted to verify a change in the PVC state (up/down). The value range is 1 to 1000. The default is 1.

Description

Use the oam frequency command to enable the transmission and retransmission detection of OAM F5 Loopback cells, as well as to modify the related parameters.

Use the undo oam frequency command to disable the transmission and retransmission detection of OAM F5 Loopback cells.

By default, OAM F5 Loopback cell transmission is disabled, but if an OAM F5 Loopback cell is received, it should be responded.

Examples

# Enable OAM F5 Loopback detection on PVC 1/32 and set the transmission interval of OAM F5 loopback cells to 12 seconds, set the retransmission detection up-count to 4, down-count to 4, and retransmission period to 1 second.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc 1/32

[Sysname-atm-pvc-Atm3/1/1-1/32] oam frequency 12 up 4 down 4 retry-frequency 1

oamping interface

Syntax

oamping interface atm { interface-number | interface-number.subnumber } pvc { pvc-name | vpi/vci } [ number timeout ]

View

ATM interface view

Default level

2: Monitor level

Parameters

interface-number: Number of an ATM main interface.

interface-number.subnumber: Number of an ATM subinterface, in the range of 0 to 1023. interface-number is the number of the ATM main interface of the subinterface.

pvc-name: PVC name, a unique case-insensitive string of 1 to 16 characters on ATM interface. The name cannot be the same as any valid VPI/VCI pair. For example, the name 1/20 is not allowed.

number: Number of OAM cells to be transmitted consecutively, in the range of 1 to 1000. The default is 5.

timeout: OAM response timeout period in seconds, in the range of 1 to 30. The default is 2.

Description

Use the oamping interface command to send OAM cells over the specified PVC on the current ATM interface so as to check the link state. If no response is received within the specified time, this means that the link is disconnected or so busy that packets are lost.

Examples

# Check the link state of PVC 1/32 on interface ATM 3/1/1 by sending three cells. Set the response timeout period to one second.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] oamping interface Atm 3/1/1 pvc 1/32 3 1

Ping interface Atm3/1/1,pvc 1/32, with 3 of 53 bytes of ATM OAM F5 end-to-end

cell(s),

timeout is 1 second(s), press CTRL_C to break

Receive reply from pvc 1/32: time=1 ms

Oam Ping statistics:

Cells: Sent = 3, Received = 3, Lost = 0 (0% loss)

pvc

Syntax

pvc { pvc-name [ vpi/vci ] | vpi/vci }

undo pvc { pvc-name [ vpi/vci ] | vpi/vci }

View

ATM interface view

Default level

2: System level

Parameters

pvc-name: PVC name, a unique case-insensitive string of 1 to 16 characters on the ATM interface. The name cannot be the same as a valid VPI/VCI pair. For example, the name 1/20 is not allowed.

NOTE:

You can set vpi or vci to 0, but not both.

Description

Use the pvc command to create a PVC and enter the PVC view on the current ATM interface.

Use the undo pvc command to delete the specified PVC.

By default, no PVC is created.

If a PVC was assigned a name upon its creation, you can use the pvc pvc-name [ vpi/vci ] command to enter its view or delete the PVC with either the undo pvc pvc-name [ vpi/vci ] command or the undo pvc vpi/vci command.

Make sure that the VPI/VCI pairs are unique on an ATM interface (including the main interface and the subinterfaces).

The number of PVCs that can be created depends on the pvc max-number command.

Related commands: display atm pvc-info and pvc max-number.

Examples

# Create a PVC named aa with the VPI/VCI value of 1/101.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc aa 1/101

pvc max-number

Syntax

pvc max-number max-number

undo pvc max-number

View

ATM main interface view

Default level

2: System level

Parameters

max-number: Maximum number of PVCs allowed on an ATM interface, in the range of 1 to 1024.

Description

Use the pvc max-number command to set the maximum number of PVCs allowed on the current ATM interface.

Use the undo pvc max-number command to restore the default.

By default, the maximum number of PVCs allowed is 1024.

The maximum number specified in this command is the total number of the PVCs that can be created on an ATM main interface and its subinterfaces.

NOTE:

The command is available only in ATM main interface view.

Examples

# Specify that interface ATM 3/1/1 support up to 128 PVCs.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc max-number 128

reset atm interface

Syntax

reset atm interface [ atm { interface-number | interface-number.subnumber } ]

View

User view

Default level

2: System level

Parameters

interface-number: Specifies the number of an ATM main interface.

subnumber: Specifies the number of an ATM subinterface, in the range of 0 to 1023. It is separated from the main interface by a dot (.).

Description

Use the reset atm interface command to clear statistics about PVCs on ATM interfaces.

This command does not clear the statistics about ATM interfaces. To clear the statistics about an ATM interface, use the reset counters interface command. For more information about the reset counters interface command, see Interface Command Reference.

If you execute this command with an ATM main interface specified, this command clears the statistics on the PVCs created on the ATM interface and its ATM subinterfaces. If you execute this command with an ATM subinterface specified, this command clears the statistics about the PVCs created on the ATM subinterface.

If you execute this command with no ATM interface specified, the statistics about the PVCs created on all the ATM interfaces are cleared.

Examples

# Clear the statistics about all the PVCs created on ATM subinterface ATM 3/1/1.1.

<Sysname> reset atm interface Atm 3/1/1.1

scramble

Syntax

scramble

undo scramble

View

ATM main interface view

Default level

2: System level

Parameters

None

Description

Use the scramble command to enable payload scrambling on the ATM interface. This, however, does not affect cell headers.

Use the undo scramble command to disable payload scrambling.

By default, payload scrambling is enabled on an ATM interface.

You can enable payload scrambling to prevent successive 0s or 1s in the payload.

With payload scrambling enabled, the interface scrambles data before sending it and descrambles received data. With payload scrambling disabled, the interface neither scrambles sent data nor descrambles received data.

NOTE:

For normal communication, make sure that the same payload scrambling setting is configured on the communicating ATM interfaces.

Examples

# Enable payload scrambling on ATM interface 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] undo scramble

service cbr

Syntax

service cbr output-pcr [ cdvt cdvt-value ]

undo service

View

PVC view

Default level

2: System level

Parameters

output-pcr: Peak cell rate (PCR) in kbps of outputting ATM cells. The value range of this argument varies with interface types, as shown in the following table:

Table 6 Value ranges of the output-pcr argument

Interface type	Value range of output-pcr
ATM OC3/STM-1	64 to 155000
ATM OC12/STM-4	64 to 622000

cdvt-value: Cell delay variation tolerance in μs, in the range of 0 to 10,000. The default is 500 μs.

Description

Use the service cbr command to specify the service type on the current PVC as constant bit rate (CBR).

Use the undo service command to restore the default.

The default service type of a PVC is UBR.

You can use this command to set the service type and rate parameters for a PVC. The new configuration will overwrite the old configuration.

Setting of the argument cdvt-value does not take effect on the router.

Related commands: service vbr-nrt, service vbr-rt, and service ubr.

Examples

# Create a PVC named aa, with the VPI/VCI of 1/101.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc aa 1/101

# Specify the service type of the PVC as CBR, and set the PCR to 50000 kbps.

[Sysname-atm-pvc-Atm3/1/1-1/101-aa] service cbr 50000

service ubr

Syntax

service ubr output-pcr

undo service

View

PVC view

Default level

2: System level

Parameters

output-pcr: Peak cell rate (PCR) in kbps of outputting ATM cells. For the value ranges of this parameter, see Table 6.

Description

Use the service ubr command to specify the service type on the current PVC as unspecified bit rate (UBR) and specify the related rate parameters.

Use the undo service command to restore the default.

The default service type of a PVC is UBR.

You can configure the service type and related rate parameters for a PVC with this command, the service vbr-nrt command, the service vbr-rt command, or the service cbr command. The new configuration will replace the old configuration.

Related commands: service vbr-nrt, service vbr-rt, and service cbr.

Examples

# Create a PVC named aa with the VPI/VCI of 1/101.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc aa 1/101

# Specify the service type of the PVC as UBR and the PCR as 100000 kbps.

[Sysname-atm-pvc-Atm3/1/1-1/101-aa] service ubr 100000

service vbr-nrt

Syntax

service vbr-nrt output-pcr output-scr output-mbs

undo service

View

PVC view

Default level

2: System level

Parameters

output-pcr: Peak cell rate (PCR) in kbps of outputting ATM cells. For the value ranges of this argument, see Table 6.

output-scr: Sustainable cell rate in kbps of outputting ATM cells. Its value ranges are the same as those of the output-pcr argument.

output-mbs: Maximum burst size for ATM cell output, that is, the maximum number of ATM cells that the output interface can cache. The value ranges from 1 to 512.

Description

Use the service vbr-nrt command to specify the service type of the current PVC as non-real-time variable bit rate (nrt_VBR) and specify the related rate parameters.

Use the undo service command to restore the default.

The default service type of a PVC is UBR.

You can configure the service type and related rate parameters for a PVC with this command, the service ubr command, the service vbr-rt command, or the service cbr command. The new configuration will overwrites the old configuration.

Setting of the arguments output-scr and output-mbs does not take effect on the router.

Related commands: service ubr, service vbr-rt, and service cbr.

Examples

# Create a PVC named aa, with the VPI/VCI of 1/101.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc aa 1/101

# Specify the service type of the PVC as nrt_VBR, setting the peak cell rate to 100000 kbps, the sustainable bit rate to 50000 kbps, and the maximum burst size to 320 cells.

[Sysname-atm-pvc-Atm3/1/1-1/101-aa] service vbr-nrt 100000 50000 320

service vbr-rt

Syntax

service vbr-rt output-pcr output-scr output-mbs

undo service

View

PVC view

Default level

2: System level

Parameters

output-pcr: Peak cell rate (PCR) in kbps of outputting ATM cells. For the value ranges of this argument, see Table 6.

output-scr: Sustainable cell rate (SCR) in kbps of outputting ATM cells. Its value ranges are the same as those of the output-pcr argument.

output-mbs: Maximum burst size of ATM cell output, that is, the maximum cache size of ATM cell output at the interface in cell number. The value ranges from 1 to 512.

Description

Use the service vbr-rt command to set the service type of the current PVC to real-time variable bit rate (rt_VBR) and specify the related rate parameters.

Use the undo service command to restore the default.

The default service type of a PVC is UBR.

You can configure the service type and related rate parameters for a PVC with this command, the service ubr command, the service vbr-nrt command, or the service cbr command. The new configuration will replace the old configuration.

Setting of the arguments output-scr and output-mbs does not take effect on the router.

Related commands: service vbr-nrt, service ubr, and service cbr.

Examples

# Create a PVC named aa with the VPI/VCI of 1/101.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc aa 1/101

# Specify the service type of the PVC as rt_VBR, setting the PCR to 100000 kbps, the SCR to 50000 kbps, and the maximum burst size to 320 cells.

[Sysname-atm-pvc-Atm3/1/1-1/101-aa] service vbr-rt 100000 50000 320

shutdown

Syntax

shutdown

undo shutdown

View

ATM interface view, PVC view

Default level

2: System level

Parameters

None

Description

Use the shutdown command to shut down an ATM main interface, ATM subinterface, or PVC.

Use the undo shutdown command to bring up an ATM main interface, ATM subinterface, or PVC.

By default, ATM main interfaces, subinterfaces, and PVCs are up.

Examples

# Shut down interface ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] shutdown

# Bring up interface ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] undo shutdown

# Shut down PVC 1/101.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc aa 1/101

[Sysname-atm-pvc-Atm3/1/1-1/101-aa] shutdown

# Bring up PVC 1/101.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] pvc aa 1/101

[Sysname-atm-pvc-Atm3/1/1-1/101-aa] undo shutdown

threshold

Syntax

threshold { sd | sf } value

undo threshold { sd | sf }

View

ATM main interface view

Default level

2: System level

Parameters

sd: Sets the signal degrade (SD) alarm threshold.

sf: Sets the signal failure (SF) alarm threshold.

value: SD or SF alarm threshold, an integer in the range of 3 to 9.

Description

Use the threshold command to set the SD alarm threshold or SF alarm threshold for the current ATM interface.

Use the undo threshold command to restore the default.

By default, the SD alarm threshold is 10e-6 and the SF alarm threshold is 10e-3.

SD and SF alarms are used to indicate current line performance. They are generated when the receiving end detects a certain amount of B2 errors. When a small amount of errors occur, SD alarms are generated; when the error rate increases to a certain level, SF alarms are generated, indicating line performance has been degrading seriously, so you must set the SF alarm threshold higher than the SD alarm threshold.

When setting the thresholds, set the SD threshold lower than the SF threshold.

Examples

# Set the SD alarm threshold to 10e-4 for interface ATM 3/1/1.

<Sysname> system-view

[Sysname] interface Atm 3/1/1

[Sysname-Atm3/1/1] threshold sd 4

04-Layer 2 - WAN Command Reference

atm-link check

clock

display atm interface

display atm pvc-info

map bridge

map ip

mtu

oam cc end-to-end

oamping interface

pvc

pvc max-number

reset atm interface

service ubr

service vbr-nrt

service vbr-rt

shutdown

threshold

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