Connectivity between PE and CE-OSPF Zone 0

OSPF metric value Propagation

1) when the PE re-distributes ospf to the MP-IBGP, The MP-IBGP uses the OSPF metric value to set the bgp med.

2) When the PE re-distributes BGP to OSPF. Use the MED of BGP to set the measurement values of OSPF internal or external routes.

Tutorial topology:

 

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Verification:

Taking 1.1.1.1 as an example, the OSPF is redistributed to BGP on R3,

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BGP redistribution in OSPF on R5

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If it is LSA 1, LSA2, LSA3, the remote PE will advertise an inter-region LSALSA 3)

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If the domain ID of the route received by the PE does not match the domain ID of the specific VRF, it will be advertised in LSA5.

Configure on R3:

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Verification:

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Not all possible conditions are provided here due to its own level issues. Hope to provide valuable comments

The format of the domain ID and ospf rt is as follows:

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If the option of ospf rt is set to external metric Value Type 2, it is not set to external metric value 1

This article is from the "Network Engineer" blog, please be sure to keep this source http://692344.blog.51cto.com/682344/1058340