Table of Contents

Chapter 1 POS Interface Configuration Commands. 1-1

1.1 POS Interface Configuration Commands. 1-1

1.1.1 clock. 1-1

1.1.2 crc. 1-2

1.1.3 debugging ppp. 1-2

1.1.4 display interface pos. 1-3

1.1.5 display ip interface pos. 1-6

1.1.6 display ipv6 interface pos. 1-7

1.1.7 flag. 1-8

1.1.8 frame-format 1-10

1.1.9 interface pos. 1-10

1.1.10 ip address ppp-negotiate. 1-11

1.1.11 link-protocol 1-12

1.1.12 loopback. 1-13

1.1.13 mtu (for POS Interfaces) 1-14

1.1.14 ppp ipcp remote-address forced. 1-14

1.1.15 ppp timer negotiate. 1-16

1.1.16 remote address. 1-16

1.1.17 scramble. 1-17

1.1.18 shutdown. 1-18

1.1.19 timer hold. 1-19

1.1.20 threshold. 1-20

 

Chapter 1  POS Interface Configuration Commands

1.1  POS Interface Configuration Commands

1.1.1  clock

Syntax

clock { master | slave }

undo clock

View

POS interface view

Default Level

2: System level

Parameters

master: Sets the clock mode of the POS interface to master.

slave: Sets the clock mode of the POS interface to slave.

Description

Use the clock command to set the clock mode of the POS interface.

Use the undo clock command to restore the default, that is, slave.

POS interfaces support two clock modes:

l           Master, which uses internal clock signal.

l           Slave, which uses line clock signal.

Similar to the DTE/DCE model of synchronous serial interfaces, POS interfaces need to choose a clock mode. When a POS interface on a device is directly connected to another device, the only requirement is that the two sides use different clock modes. In connection to a switch, however, the switch is DCE and uses internal clock, so the POS interface is DTE and must adopt the slave clock mode.

Examples

# Set the clock mode of interface POS 1/1/1 to master.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] clock master

1.1.2  crc

Syntax

crc { 16 | 32 }

undo crc

View

POS interface view

Default Level

2: System level

Parameters

16: Sets CRC length to 16 bits.

32: Sets CRC length to 32 bits.

Description

Use the crc command to set the CRC length on the POS interface.

Use the undo crc command to restore the default, that is, 32 bits.

Examples

# Set the CRC length on interface POS 1/1/1 to 16 bits.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] crc 16

1.1.3  debugging ppp

Syntax

debugging ppp { { all | core event | ip packet | ipv6 packet | mpls-multicast packet | mpls-unicast packet | osi-npdu packet } | { ipcp | ipv6cp | lcp | mplscp | osicp } { all | error | event | packet | state } } [ interface interface-type interface-number ]

undo debugging ppp { { all | core event | ip packet | ipv6 packet | mpls-multicast packet | mpls-unicast packet | osi-npdu packet } | { ipcp | ipv6cp | lcp | mplscp | osicp } { all | error | event | packet | state } } [ interface interface-type interface-number ]

View

User view

Default Level

1: Monitor level

Parameters

all: Enables all types of debugging.

core event: Enables debugging for the PPP core module.

interface-type interface-number: Port type and port number.

ip packet: Enables debugging for IP packets.

ipv6 packet: Enables debugging for IPv6 packets.

ipcp: Enables debugging for IP control protocol.

ipv6cp: Enables debugging for IPv6 control protocol.

lcp: Enables debugging for PPP link control protocol.

mpls-multicast packet: Enables debugging for MPLS multicast packets.

mpls-unicast packet: Enables debugging for MPLS unicast packets.

mplscp: Enables debugging for MPLS control protocol.

osicp: Enables debugging for OSI control protocol.

osi-npdu: Enables debugging for OSI network packets.

all: Enables all types of debugging concerning PPP.

error: Enables debugging for PPP errors.

event: Enables debugging for PPP events.

packet: Enables debugging for PPP packets.

state: Enables debugging for PPP status.

Description

Use the debugging ppp command to enable specific types of debugging concerning PPP. Use the undo debugging ppp command to disable specific types of debugging concerning PPP.

By default, all types of debugging concerning PPP are disabled.

Examples

# Enable all types of debugging concerning PPP on POS interface 4/1/2.

<Sysname> debugging ppp all interface pos 4/1/2

1.1.4  display interface pos

Syntax

display interface pos [ interface-number ]

View

Any view

Default Level

1: Monitor level

Parameters

interface-number: Interface number.

Description

Use the display interface pos command to display the status and configuration information of a POS interface or all POS interfaces.

Examples

# Display the status and configuration information of the interface POS 10/1/1.

<Sysname> display interface pos 10/1/1

Pos10/1/1 current state: DOWN

Line protocol current state: DOWN

Description: Pos10/1/1 Interface

The Maximum Transmit Unit is 1500, Hold timer is 10(sec)

Internet protocol processing : disabled

Link layer protocol is PPP

LCP initial

Port hardware type is POS_NO_CONNECTOR

Physical layer is Packet over SDH

LoopBack is not set

FCS: 32-bit CRC

Clock Source: Slave

Clock Grade:  42

SPE Scrambling: Enable

    Section Layer:    OOF  LOF  LOS

    Line    Layer:

    Path    Layer:

    C2(Rx): 0x30

    C2(Tx): 0x16

    J0(Rx): ""

    J0(Tx): ""

    J1(Rx): ""

    J1(Tx): ""

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

    Section Layer: B1  0

    Line    Layer: B2  0  M1  0

    Path    Layer: B3  0  G1  0

Last 300 seconds input:  0 packet/sec   0 byte/sec

Last 300 seconds output:  0 packet/sec   0 byte/sec

Input:   0 packets,   0 bytes

         0 errors,   0 crc,   0 giants

         0 pads,   0 aborts,   0 overflows

Output:  0 packets,   0 bytes

         0 errors,   0 underflows

Table 1-1 Description on the fields of the display interface pos command

Field	Description
Pos10/1/1 current state: DOWN	Current state of the POS interface
Line protocol current state: DOWN	Link layer state of the POS interface
Description: Pos10/1/1 Interface	Description on the POS interface
The Maximum Transmit Unit is 1500, Hold timer is 10(sec)	MTU of the POS interface and the interval at which the link layer protocol sends keepalives
Internet protocol processing: disabled	IP protocol processing capability, enabled or disabled
Link layer protocol is PPP	Link layer protocol of the POS interface
LCP initial	LCP state
Port hardware type is POS_NO_CONNECTOR	Hardware type of the port
Physical layer is Packet Over SDH,	Status of physical layer
LoopBack is not set	Loopback status
FCS: 32-bit CRC	CRC code
Clock Source: Slave	Transmission clock source
Clock Grade:  42	Grade of clock
SPE Scrambling: Enable	Status of the interface scrambling
section layer:  OOF  LOF  LOS	Section layer alarm (including OOF, LOF, LOS)
line    layer:	Line layer alarm (including AIS, RDI)
path    layer:	Path layer alarm (including LOP, AIS, RDI)
C2(Rx): 0x30	The C2 byte (the signal flag byte) of the received packet
C2(Tx): 0x16	The C2 byte of the packet sent
J0(Rx): ""	The J0 overhead byte (the section layer tracking byte) of the received packet
J0(Tx): ""	The J0 overhead byte of the packet sent
J1(Rx): ""	The J1 overhead byte (the channel layer tracking byte) of the received packet
J1(Tx): ""	The J1 overhead byte of  the packet sent
BER Thresholds:  SD:  10e-6        SF:  10e-3	Bit error code thresholds: Signal degrade (10e-6), signal fail (10e-3).
Last 300 seconds input:  0 packet/sec   0 byte/sec	Inbound packet rate in the latest 300 seconds (in packets per second and Bps)
Last 300 seconds output:  0 packet/sec   0 byte/sec	Outbound packet rate in the latest 300 seconds (in packets per second and Bps)
Input:   0 packets,   0 bytes 0 errors,   0 crc,   0 giants  0 pads,   0 aborts,   0 overflows	Statistics on the inbound packets, including the number of the inbound packets, the size of the inbound packets (in bytes), and the number of the errors, CRC errors, giant packets, pads, aborts, and overflows.
Output:  0 packets,   0 bytes 0 errors,   0 underflows	Statistics on the outbound packets, including the number of the outbound packets, the size of the outbound packets (in bytes), the number of errors and underflows.

 

1.1.5  display ip interface pos

Syntax

display ip interface pos interface-number

View

Any view

Default Level

1: Monitor level

Parameters

interface-number: Interface number.

Description

Use the display ip interface pos command to view the IP-related information about a POS interface.

Examples

# Display the IP-related information about interface POS 2/1/1.

<Sysname> display ip interface pos 2/1/1

Pos2/1/1 current state :UP

Line protocol current state :UP

Internet Address is 13.13.13.13/8 Primary

Broadcast address : 13.255.255.255

The Maximum Transmit Unit : 4470 bytes

ip fast-forwarding incoming packets state is Enabled

ip fast-forwarding outgoing packets state is Enabled

input packets : 5, bytes : 420, multicasts : 0

output packets : 5, bytes : 420, multicasts : 0

TTL invalid packet number:         0

ICMP packet input number:          5

  Echo reply:                      5

  Unreachable:                     0

  Source quench:                   0

  Routing redirect:                0

  Echo request:                    0

  Router advert:                   0

  Router solicit:                  0

  Time exceed:                     0

  IP header bad:                   0

  Timestamp request:               0

  Timestamp reply:                 0

  Information request:             0

  Information reply:               0

  Netmask request:                 0

  Netmask reply:                   0

  Unknown type:                    0

1.1.6  display ipv6 interface pos

Syntax

display ipv6 interface pos interface-number

View

Any view

Default Level

1: Monitor level

Parameters

interface-number: Interface number..

Description

Use the display ipv6 interface pos command to view the IPv6-related information about a POS interface.

Examples

# Display the IPv6-related information about interface POS 2/1/1.

<Sysname> display ipv6 interface pos 2/1/1

Pos2/1/1 current state :UP

Line protocol current state :UP

IPv6 is enabled, link-local address is FE80::813D:0:C252:1

  Global unicast address(es):

    22:22::22:22, subnet is 22::/22 [TENTATIVE]

  Joined group address(es):

    FF02::1:FF22:22

    FF02::1:FF52:1

    FF02::2

    FF02::1

  MTU is 4478 bytes

  ND DAD is enabled, number of DAD attempts: 1

  ND reachable time is 30000 milliseconds

  ND retransmit interval is 1000 milliseconds

  Hosts use stateless autoconfig for addresses

1.1.7  flag

Syntax

flag { c2 | { j0 | j1 } { sdh | sonet } } flag-value

undo flag { c2 | { j0 | j1 } { sdh | sonet } }

View

POS interface view

Default Level

2: System level

Parameters

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

j0 flag-value: Regeneration section trace message, a section overhead byte used to test 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 0 to 0xFF (0x01 by default).

j1 flag-value: Path trace message, a higher-order path overhead byte used to test 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 SDH (Synchronous Digital Hierarchy).

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

 

 

Description

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

Use the undo flag { j0 | j1 } sdh command to restore the default SONET/SDH overhead bytes.

By default, the default SDH overhead bytes are used.

The default overhead bytes are as follows.

l           c2: 0x16

l           j0 (SDH): 15 hexadecimal numbers, each of which has the value of 0x0

l           j1 (SDH): 15 hexadecimal numbers, each of which has the value of 0x0

l           j0 (SONET): 0x01

l           j1 (SONET): 62 hexadecimal numbers, each of which has the value of 0x0

Inconsistency between the c2 and j0 settings of a sending POS interface and the receiving POS interface causes alarms.

Related commands: display interface pos.

Examples

# Set the SDH overhead byte J0 for interface POS 1/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] flag j0 sdh ff

1.1.8  frame-format

Syntax

frame-format { sdh | sonet }

undo frame-format

View

POS interface view

Default Level

2: System level

Parameters

sdh: Sets the framing format to SDH.

sonet: Sets the framing format to SONET.

Description

Use the frame-format command to configure the framing format on a POS interface. Use the undo frame-format command to restore the default, that is, SDH.

Examples

# Set the framing format to SDH on interface POS 1/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] frame-format sdh

1.1.9  interface pos

Syntax

interface pos interface-number

View

System view

Default Level

2: System level

Parameters

interface-number: POS interface number expressed in the form of interface board slot number/sub-board slot number/interface number.

Description

Use the interface pos command to enter POS interface view.

To configure a POS interface, enter its view first.

Example

# Enter the interface view of POS 2/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 2/1/1

[Sysname-Pos2/1/1]

1.1.10  ip address ppp-negotiate

Syntax

ip address ppp-negotiate

undo ip address ppp-negotiate

View

POS interface view

Default Level

2: System level

Parameters

None

Description

Use the ip address ppp-negotiate command to enable IP negotiating on a POS interface, through which the POS interface can be assigned an IP address through PPP negotiation. Use the undo ip address ppp-negotiate command to disable IP address negotiating.

By default, IP address negotiating is disabled on a POS interface.

Related commands: remote address, ppp ipcp remote-address forced.

Examples

# Enable IP address negotiating on interface POS 4/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos pos 4/1/1

[Sysname-Pos4/1/1] ip address ppp-negotiate

1.1.11  link-protocol

Syntax

link-protocol ppp

View

POS interface view

Default Level

2: System level

Parameters

ppp: Specifies PPP as the data link layer protocol.

Description

Use the link-protocol command to specify the data link layer protocol for a POS interface.

By default, the data link protocol of a POS interface is PPP.

Examples

# Set the data link layer protocol as PPP for interface POS 1/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] link-protocol ppp

 

 

1.1.12  loopback

Syntax

loopback { local | remote }

undo loopback

View

POS interface view

Default Level

2: System level

Parameters

local: Internal loopback.

remote: External loopback.

Description

Use the loopback command to enable loopback for a POS interface.

Use the undo loopback command to disable loopback.

By default, loopback is disabled.

Loopback is intended for test use. Disable it otherwise.

 

 

Examples

# Enable internal loopback on interface POS 1/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] loopback local

1.1.13  mtu (for POS Interfaces)

Syntax

mtu size

undo mtu

View

POS interface view

Default Level

2: System level

Parameters

size: Maximum transmission unit (MTU) to be set. For 155 Mbps POS cards, this argument ranges from 64 to 1,995 (in bytes); for 2.5 Gbps POS cards and the 10 Gbps POS cards, this argument ranges from 64 to 9,192 (in bytes).

Description

Use the mtu command to set the MTU for a POS interface.

Use the undo mtu command to restore the default.

By default, the MTU of a POS interface is 1,500 bytes.

The MTU setting of the POS interface can affect the assembly and fragmentation of IP packets on it.

Related commands: display interface pos.

Examples

# Set the MTU of interface POS 1/1/1 to 1,492.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] mtu 1492

1.1.14  ppp ipcp remote-address forced

Syntax

ppp ipcp remote-address forced

undo ppp ipcp remote-address forced

View

POS interface view

Default Level

2: System level

Parameters

None.

Description

Use the ppp ipcp remote-address forced command to enable a device to allocate IP addresses to its peers by force. In this case, the IP address configured locally on the peers are invalid. Use the undo ppp ipcp remote-address forced command to disable a device from allocating IP addresses to its peers by force. In this case, the IP addresses configure locally on the peers are valid.

In the course of establishing a PPP link, a device does not allocate IP addresses to its peers by force by default. That is, the IP addresses configured locally are valid. In this case, a device allocates an IP address to a peer only when the latter applies an IP address explicitly. If the peer already has an IP address configured, the device does not allocate IP addresses to it by force. To enable a device to allocate IP addresses to its peers by force, you need to execute the ppp ipcp remote-address forced command in POS interface view.

Related commands: remote address.

Examples

# Allocate IP address 10.0.0.1 to the peer connecting to interface POS 4/1/1. (In this case, the IP address is optional to the peer.)

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface Pos 4/1/1

[Sysname-Pos4/1/1] remote address 10.0.0.1

# Allocate IP address 10.0.0.1 to the peer connecting  to interface POS 4/1/1 by force. In this case, the peer uses 10.0.0.1 as its IP address, and the IP address configured locally (if any) gets invalid.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface Pos 4/1/1

[Sysname-Pos4/1/1] remote address 10.0.0.1

[Sysname-Pos4/1/1] ppp ipcp remote-address forced

1.1.15  ppp timer negotiate

Syntax

ppp timer negotiate seconds

undo ppp timer negotiate

View

POS interface view

Default Level

2: System level

Parameters

seconds: Interval to send PPP negotiation packets (in seconds). In the process of PPP negotiation, an entity sends another packet to its peer if it does not receive the response from the peer within this interval.

Description

Use the ppp timer negotiate command to set the interval to send PPP negotiation packets. Use the undo ppp timer negotiate command to restore the default.

By default, the interval to send PPP negotiation packets is 3 seconds.

Examples

# Set the interval to send PPP negotiation packets to 5 seconds on interface POS 2/1/2.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 2/1/2

[Sysname-Pos2/1/2] ppp timer negotiate 5

1.1.16  remote address

Syntax

remote address { ip-address | pool [ pool-number ] }

undo remote address

View

POS interface view

Default Level

2: System level

Parameters

ip-address: IP address to be allocated for the peer end.

pool-number: Number of the address pool, an IP address of which is to be allocated for the peer end. This argument ranges from 0 to 99 and defaults to 0.

Description

Use the remote address command to allocate an IP address for the peer end. Use the undo remote address command to remove the IP address allocated for the peer end.

By default, a POS interface does not allocate IP addresses for the peer end.

When the remote address pool is configured but pool-number is not specified, No.0 global address pool is used by default.

When the interface of the peer end is not configured with the IP address but the local device has an IP address, you can configure the local device to allocate IP addresses for the interface of the peer end. to achieve this, you need to configure the ip address ppp-negotiate command on the peer-end device and configure the remote address command on the local device, through which the peer end interface can optional accept the IP address allocated through PPP negotiation.

 

 

Related commands: ppp ipcp remote-address forced.

Examples

# Allocate IP address 10.0.0.1 for the peer end through interface POS 4/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 4/1/1

[Sysname-Pos4/1/1] remote address 10.0.0.1

1.1.17  scramble

Syntax

scramble

undo scramble

View

POS interface view

Default Level

2: System level

Parameters

None

Description

Use the scramble command to enable payload scrambling on the POS interface.

Use the undo scramble command to disable payload scrambling.

By default, payload scrambling is enabled.

You may configure payload scrambling to prevent the presence of excessive consecutive 1s or 0s to facilitate line clock signal extraction at the receiving end.

 

 

Examples

# Disable payload scrambling on interface POS 1/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 1/1/1

[Sysname-Pos1/1/1] undo scramble

1.1.18  shutdown

Syntax

shutdown

undo shutdown

View

POS interface view

Default Level

2: System level

Parameters

None

Description

Use the shutdown command to shut down the POS interface.

Use the undo shutdown command to bring up the POS interface.

By default, a POS interface is up.

In some cases, for example, after changing the operating parameters of an interface, you may be required to re-enable the interface with the shutdown and undo shutdown commands for the settings to take effect.

Examples

# Shut down the POS interface POS 4/1/1.

<Sysname> system-view

[Sysname] interface pos 4/1/1

[Sysname-Pos4/1/1] shutdown

1.1.19  timer hold

Syntax

timer hold seconds

undo timer hold

View

POS interface view

Default Level

2: System level

Parameters

seconds: Interval to send keepalive packets (in seconds). The system default is 10 seconds. A value of 0 disables keepalive packet sending.

Description

Use the timer hold command to set the interval to send keepalive packets. Use the undo timer hold command to restore the default.

On low-rate links, set the interval to send keepalive packets to a relatively large number. Because large packets may take a very long time to be transmitted on a low-rate link, the transmission and receiving of the keepalive packets may be delayed. If the interface receives no keepalive packet from the peer end after specific number of keepalive cycles, the link is considered faulty. in this case, the link will be torn down.

For PPP link, the interval to send keepalive packets of the both sides must be the same.

Examples

# Set the interval to send keepalive packets to 20 seconds on interface POS 2/1/2.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 2/1/2

[Sysname-Pos2/1/2] timer hold 20

1.1.20  threshold

Syntax

threshold { sd | sf } value

undo threshold { sd | sf }

View

POS interface view

Default Level

2: System level

Parameters

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

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

value: SD or SF threshold value, an integer in the range 3 to 9. It is interpreted as a negative exponent of 10e. For example, the threshold can be 10e-3.

Description

Use the threshold command to set the SD or SF alarm threshold for a POS 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. The bit error rate threshold of SF is higher than that of SD. 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 the line performance has been degrading seriously.

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

Examples

# Set the SD threshold to 10e-4 on interface POS 2/1/1.

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] interface pos 2/1/1

[Sysname-Pos2/1/1] threshold sd 4