Contents

Layer 2 forwarding commands· 1

Normal Layer 2 forwarding commands· 1

display mac-forwarding statistics· 1

reset mac-forwarding statistics· 3

Fast Layer 2 forwarding commands· 3

display mac-forwarding cache ip· 3

display mac-forwarding cache ip fragment 5

display mac-forwarding cache ipv6· 6

 

Layer 2 forwarding commands

This feature is supported only on Layer 2 Ethernet ports on Ethernet switching modules.

On Layer 2 Ethernet switching modules of MSR devices that are operating in IRF mode, Layer 2 forwarding across member devices is not supported. On SIC Layer 2 Ethernet switching modules, Layer 2 forwarding across member devices and slots is not supported.

Layer 2 forwarding across slots that reside on the same device is supported if multiple HMIM-24GSW, HMIM-24GSWP, HMIM-8GSW, or HMIM-8GSWF Layer 2 Ethernet switching modules are installed on the following devices:

·     MSR5660.

·     MSR5680.

Layer 2 forwarding across slots that reside on the same device is not supported on MSR5620 devices that are installed with multiple HMIM-8GSW or HMIM-8GSWF Layer 2 Ethernet switching modules.

On MSR56 devices:

·     Layer 2 forwarding across slots is supported if multiple HMIM Layer 2 Ethernet switching modules are installed on the same SPE-S1 module.

·     Layer 2 forwarding across slots is not supported if multiple HMIM Layer 2 Ethernet switching modules are installed on the same SPE-S3 module.

Normal Layer 2 forwarding commands

display mac-forwarding statistics

Use display mac-forwarding statistics to display Layer 2 forwarding statistics.

Syntax

display mac-forwarding statistics [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify this option, the command displays Layer 2 forwarding statistics on all interfaces.

Examples

# Display Layer 2 forwarding statistics on all interfaces.

<Sysname> display mac-forwarding statistics

Input:

   Sum:               888        Unknown Unicast:   0

   Broadcast:         0          Multicast:         0

   Filtered:          0          STP discarded:     0

   Service dropped:   0          Source dropped:    0

   Unknown dropped: 0          Learning dropped:  0

   Blackhole dropped: 0          Suppress dropped:  0

   Source MAC dropped:0

Deliver:

   Sum:               111        L2 protocol:       11

   Local MAC address: 100

Output:

   Sum:               666        Filtered:          0

   Blackhole dropped: 0          STP discarded:     0

   Service dropped:   0          Dest MAC dropped:  0

# Display Layer 2 forwarding statistics on GigabitEthernet 1/0/1.

<Sysname> display mac-forwarding statistics interface gigabitethernet 1/0/1

GigabitEthernet1/0/1:

Input frames: 100    Output frames:100

Filtered:     0

Table 1 Command output

Field	Description
Input	Inbound Ethernet frame statistics. ·     Sum—Total number of received Ethernet frames. ·     Filtered—Number of Ethernet frames filtered out by 802.1Q VLAN inbound filtering rules. ·     STP discarded—Number of inbound Ethernet frames dropped on the ports blocked by STP. ·     Service dropped—Number of Ethernet frames dropped by inbound service features. ·     Source dropped—Number of Ethernet frames dropped because their source MAC addresses are all-zeros, multicast, or broadcast MAC addresses. ·     Unknown dropped—Number of Ethernet frames dropped because the device is disabled from forwarding frames with unknown source MAC addresses. ·     Learning dropped—Number of Ethernet frames dropped because the device is disabled from forwarding unknown frames after the number of learned MAC addresses reaches the upper limit. ·     Suppress dropped—Number of Ethernet frames dropped by storm suppression. ·     Broadcast—Number of received broadcast Ethernet frames. ·     Multicast—Number of received multicast Ethernet frames. ·     Unknown unicast—Number of received unknown unicast Ethernet frames. ·     Blackhole dropped—Number of Ethernet frames dropped because they are sourced from blackhole MAC addresses. ·     Source MAC dropped—Number of Ethernet frames dropped by features based on the source MAC addresses.
Deliver	Statistics of Ethernet frames delivered to the CPU. ·     Sum—Total number of Ethernet frames delivered to the CPU. ·     L2 protocol—Number of Layer 2 protocol Ethernet frames delivered to the CPU. ·     Local MAC address—Number of Ethernet frames that use the MAC addresses of local Layer 3 VLAN interfaces as the destination MAC addresses.
Output	Outbound Ethernet frame statistics. ·     Sum—Total number of sent Ethernet frames. ·     Filtered—Number of Ethernet frames filtered out by 802.1Q VLAN outbound filtering rules. ·     Blackhole dropped—Number of Ethernet frames dropped because they are destined for blackhole MAC addresses. ·     STP discarded—Number of outbound Ethernet frames dropped on the ports blocked by STP. ·     Service dropped—Number of Ethernet frames dropped by outbound service features. ·     Dest MAC dropped—Number of Ethernet frames dropped by features based on the destination MAC addresses.
GigabitEthernet1/0/1	Layer 2 forwarding statistics on GigabitEthernet 1/0/1: ·     Input frames—Number of Ethernet frames received on the interface. ·     Output frames—Number of Ethernet frames sent out of the interface. ·     Filtered—Number of Ethernet frames filtered out because they are from other VLANs.

 

reset mac-forwarding statistics

Use reset mac-forwarding statistics to clear Layer 2 forwarding statistics.

Syntax

reset mac-forwarding statistics

Views

User view

Predefined user roles

network-admin

network-operator

Examples

# Clear Layer 2 forwarding statistics.

<Sysname> reset mac-forwarding statistics

Fast Layer 2 forwarding commands

display mac-forwarding cache ip

Use display mac-forwarding cache ip to display IPv4 fast forwarding entries.

Syntax

In standalone mode:

display mac-forwarding cache ip [ ip-address ] [ slot slot-number ]

In IRF mode:

display mac-forwarding cache ip [ ip-address ] [ chassis chassis-number slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ip-address: Specifies an IPv4 address. If you do not specify an IPv4 address, this command displays all IPv4 fast forwarding entries.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays IPv4 fast forwarding entries for all cards. (In standalone mode.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, this command displays IPv4 fast forwarding entries for all cards. (In IRF mode.)

Examples

# Display all IPv4 fast forwarding entries.

<Sysname> display mac-forwarding cache ip

Total number of mac-forwarding entries: 2

SIP            SPort DIP             DPort Pro Input_If    Output_If   VLAN

1.1.1.2        99    1.1.1.1         2048  1   GE1/0/1     GE1/0/2     2

1.1.1.1        98    1.1.1.2         2012  1   GE1/0/2     GE1/0/1     2

Table 2 Command output

Field	Description
Total number of mac-forwarding entries	Total number of IPv4 fast forwarding entries.
SIP	Source IPv4 address.
SPort	Source port number.
DIP	Destination IPv4 address.
DPort	Destination port number.
Pro	Protocol number.
Input_If	Input interface type and number. If no input interface is involved in fast forwarding, this field displays N/A. If no input interface is available, this field displays a hyphen (-).
Output_If	Output interface type and number. If no output interface is involved in fast forwarding, this field displays N/A. If no output interface is available, this field displays a hyphen (-).
VLAN	VLAN ID.

 

display mac-forwarding cache ip fragment

Use display mac-forwarding cache ip fragment to display IPv4 fast forwarding entries for fragments.

Syntax

In standalone mode:

display mac-forwarding cache ip fragment [ ip-address ] [ slot slot-number ]

In IRF mode:

display mac-forwarding cache ip fragment [ ip-address ] [ chassis chassis-number slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ip-address: Specifies an IPv4 address. If you do not specify an IPv4 address, this command displays IPv4 fast forwarding entries for all fragments.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays IPv4 fast forwarding entries for fragments on all cards. (In standalone mode.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, this command displays IPv4 fast forwarding entries for fragments on all cards. (In IRF mode.)

Examples

# Display IPv4 fast forwarding entries for all fragments.

<Sysname> display mac-forwarding cache ip fragment

Total number of fragment mac-forwarding entries: 2

SIP             SPort DIP             DPort Pro Input_If    ID     VLAN

1.1.1.1         117   1.1.1.2         0     1   GE1/0/1     2828   1

1.1.1.2         110   1.1.1.1         67    17  GE1/0/2     2322   1

Table 3 Command output

Field	Description
Total number of fragment mac-forwarding entries	Total number of IPv4 fast forwarding entries for fragments.
SIP	Source IPv4 address.
SPort	Source port number.
DIP	Destination IPv4 address.
DPort	Destination port number.
Pro	Protocol number.
Input_If	Input interface type and number. If no input interface is involved in fast forwarding, this field displays N/A. If no input interface is available, this field displays a hyphen (-).
ID	Fragment ID.
VLAN	VLAN ID.

 

display mac-forwarding cache ipv6

Use display mac-forwarding cache ipv6 to display IPv6 fast forwarding entries.

Syntax

In standalone mode:

display mac-forwarding cache ipv6 [ ipv6-address ] [ slot slot-number ]

In IRF mode:

display mac-forwarding cache ipv6 [ ipv6-address ] [ chassis chassis-number slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ipv6-address: Specifies an IPv6 address. If you do not specify an IPv6 address, this command displays all IPv6 fast forwarding entries.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays IPv6 fast forwarding entries for all cards. (In standalone mode.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, this command displays IPv6 fast forwarding entries for all cards. (In IRF mode.)

Examples

# Display all IPv6 fast forwarding entries.

<Sysname> display mac-forwarding cache ipv6

Total number of IPv6 mac-forwarding items: 1

Src IP: 2002::1                                        Src port: 129

Dst IP: 2001::1                                        Dst port: 65535

VLAN ID: 2

Protocol: 2

Input interface: GE1/0/2

Output interface: GE1/0/1

Table 4 Command output

Field	Description
Total number of IPv6 mac-forwarding items	Total number of IPv6 fast forwarding entries.
Src IP	Source IPv6 address.
Src port	Source port number.
Dst IP	Destination IPv6 address.
Dst Port	Destination port number.
Protocol	Protocol number.
Input interface	Input interface type and number. If no input interface is involved in fast forwarding, this field displays N/A. If no input interface is available, this field displays a hyphen (-).
Output interface	Output interface type and number. If no output interface is involved in fast forwarding, this field displays N/A. If no output interface is available, this field displays a hyphen (-).