Prerequisites For Mac Address Limiting On Service Instances Bridge Domains And Evc Port Channels - Cisco ASR 920 Series Configuration Manual Ethernet Router

Prerequisites for MAC Address Limiting on Service Instances Bridge Domains and EVC Port Channels

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Prerequisites for MAC Address Limiting on Service Instances
Bridge Domains and EVC Port Channels
• An understanding of service instances and bridge domains.
• An understanding of how port channels and EtherChannels work in a network.
Restrictions for MAC Address Limiting on Service Instances
Bridge Domains and EVC Port Channels
MAC address limiting for service instances and bridge domains is configured under a service instance and is
permitted only after the service instance is configured under a bridge domain. If a service instance is removed
from a bridge domain, all the MAC address limiting commands under it are also removed. If a bridge domain
is removed from a service instance, all the MAC address limiting commands are also removed.
The MAC Address on RSP1 port channel overlaps with the interface MAC address and the traffic is dropped
from ports 1 to 8 when an interface module is placed on slot 4.
Information About MAC Address Limiting on Service Instances
Bridge Domains and EVC Port Channels
Ethernet Virtual Circuits, Service Instances, and Bridge Domains
An Ethernet virtual circuit (EVC) as defined by the Metro Ethernet Forum is a port-level point-to-point or
multipoint-to-multipoint Layer 2 circuit. It is an end-to-end representation of a single instance of a Layer 2
service being offered by a provider to a customer. An EVC embodies the different parameters on which the
service is being offered. A service instance is the instantiation of an EVC on a given port.
Support for Ethernet bridging is an important Layer 2 service that is offered on a router as part of an EVC.
Ethernet bridging enables the association of a bridge domain with a service instance.
Service instances are configured under a port channel. The traffic carried by service instances is load-balanced
across member links. Service instances under a port channel are grouped and each group is associated with
one member link. Ingress traffic for a single service instance can arrive on any member of the bundle. All
egress traffic for a service instance uses only one of the member links. Load-balancing is achieved by grouping
service instances and assigning them to a member link.
For information about the Metro Ethernet Forum standards, see the "Standards" table in the "Additional
References" section.
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
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Configuring MAC Address Limiting on Service Instances Bridge Domains and EVC Port Channels