Prerequisites for Implementing Multipoint Layer 2 Services
Before you configure Multipoint Layer 2 Services, ensure that the network is configured as follows:
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To perform these configuration tasks, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. All command task IDs are listed in individual command references and in the Cisco IOS XR Task ID Reference Guide.
If you need assistance with your task group assignment, contact your system administrator.
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Configure IP routing in the core so that the provider edge (PE) routers can reach each other through IP.
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Configure MPLS and Label Distribution Protocol (LDP) in the core so that a label switched path (LSP) exists between the PE routers.
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Configure a loopback interface to originate and terminate Layer 2 traffic. Make sure that the PE routers can access the other router's loopback interface.
Note |
The loopback interface is not needed in all cases. For example, tunnel selection does not need a loopback interface when Multipoint Layer 2 Services are directly mapped to a TE tunnel. |