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The Multicast and Unicast static MAC address support on Service Instances feature supports configuration of a static MAC address on a pseudoport. Use of a static MAC address for Broadband Network Gateway (BNG) upstream traffic enables traffic forwarding while conserving MAC table resources and limiting the traffic flood by creating multicast groups.
Knowledge of both port and bridge domain limitations.
Knowledge of service instances.
Multicast static MAC addresses are not allowed in MAC address security configurations.
Static MAC addresses are programmed only on switch processors (both active and standby).
Static MAC configuration is not allowed at secure service instance.
Static MAC addresses are programmed only on switch processors (both active and standby).
The Static MAC address on Pseudowires is not supported on the Cisco ASR 900 Series Routers.
Static MAC address configuration is not supported on Trunk EFP.
Static MAC address configuration on service instances eliminates the need for MAC address learning, which is required for traffic forwarding. In the upstream direction, without MAC address learning, MAC address table resources can be conserved and network resources optimized.
When a bridge domain ID is either changed or deleted for a service instance, all static MAC addresses are removed.
When a service instance is deleted, all static MAC addresses on that pseudoport are removed.
Facilitates optimization of network resources
Conserves MAC table resources when used for upstream traffic
Perform this task to manually configure a static MAC address on a service instance.
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Step 1 |
enable Example:Enables privileged EXEC mode.
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Step 2 |
configure terminal Example:Enters global configuration mode. |
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Step 3 |
interface type number Example:Configures an interface type and enters interface configuration mode. |
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Step 4 |
service instance id ethernet [evc-id ] Example:Configures an Ethernet service instance on an interface and enters service instance configuration mode. |
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Step 5 |
encapsulation dot1q vlan-id [, vlan-id [- vlan-id ]] [native ] Example:Enables IEEE 802.1Q encapsulation of traffic on a specified subinterface in a VLAN. |
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Step 6 |
bridge-domain bridge-id [split-horizon [group group-id ]] Example:Binds a service instance to a bridge domain instance. |
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Step 7 |
mac static address mac-addr [auto-learn ] [disable-snooping ] Example:Configures a static MAC address. |
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Step 8 |
exit Example:Returns the CLI to privileged EXEC mode. |
Router> enable
Router# configure terminal
Router(config)# interface GigabitEthernet 0/2/1
Router(config-if)# service instance 1 ethernet
Router(config-if-srv)# encapsulation dot1q 100
Router(config-if-srv)# bridge-domain 100
Router(config-if-srv)# mac static address 0000.bbbb.cccc
Router(config-if-srv)# exit
The sample output for the show bridge-domain command:
Router# show bridge-domain 10 mac static address
Bridge-Domain ID : 10
Static MAC count : System : 1, bridge-domain : 1
Port Address Action
Gi0/3/7 ServInst 10 aaa1.123c.bc32
The sample output for the show mac address-table command:
Router# show mac address-table bdomain 10
Nile Mac Address Entries
BD mac addr type ports
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10 aaa1.123c.bc32 STATIC Gi0/3/7.Efp10
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