Dynamic inter-VRF routing between the global VRF domain and a VRF instance

Dynamic inter-VRF routing between the global VRF domain and a VRF instance

This section contains two configuration examples. Both examples show how to configure dynamic inter-VRF routing via BGP between the default global VRF domain and VRF red. Both examples use the same topology as described in the drawing below. The first example includes i-BGP peering to the external red router. The second example includes e-BGP peering to the external red router. Both examples involve leaking BGP routes between the global VRF domain and VRF red, and subsequently to the external red router.

To achieve dynamic inter-VRF routing between the default global VRF domain and a VRF instance, an internal e-BGP neighbor relationship is formed between the global VRF domain and VRF red using the BGP remote-as and local-as commands.

The internal e-BGP peering relationship is only used when performing inter-VRF route leakage from the default global VRF domain to a VRF instance.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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- Inter VRF (IVR) communication

 

 

 

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Additional notes

In addition, route maps are referenced by BGP, to filter selective routes advertised to each VRF instance from the global VRF domain.

The first example involves leaking routes from default global VRF domain to VRF red (internally via e-BGP), and subsequently to an external i-BGP neighbor (red router) and vice- versa.

The second example involves leaking routes from default global VRF domain to VRF red (internally via e-BGP), and subsequently to an e-BGP neighbor (red router) and vice-versa.

Page 78 Configure VRF-lite

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Allied Telesis C613-16164-00 REV E manual Additional notes

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