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How to Control the Routes...

How to Control the Routes Advertised by the Device to the OSPF peer

Latest reply: Dec 29, 2018 14:37:49 187 4 8 1
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[Problem Description]

The three devices A, B, C, and B have established OSPF peer with A and C respectively and belong to the same process. The OSPF of A imports the direct route. Therefore, the routing policy needs to be configured on B, C cannot receive a loopback address from A.

[Networking]

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[Verification Process]

Three loopback addresses are configured on A, and OSPF VPN peer is established between vlanif211 and B. In addition, direct routes are imported into the OSPF process


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The three routes are displayed in the VPN routing table on B.

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A OSPF VPN neighbor relationship is established between B and C through vlanif1211. The three routes are also displayed on C's device.

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Configure ospf filter-lsa-out on vlanif1211 of B to filter LSAs.


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After the configuration is complete, there are only two routes on C.

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OSPF
  • x
  • convention：

Helpful (8) Favorite(1) Share Report
Created Dec 26, 2018 11:16:53 Helpful(0) Helpful(0)

Before the emergence of OSPF, the Routing Information Protocol (RIP) was widely used as an IGP on networks. RIP is a distance-vector routing protocol. Due to its slow convergence, routing loops, and poor scalability, RIP is gradually being replaced with OSPF.
  • x
  • convention：
Created Dec 28, 2018 10:05:18 Helpful(0) Helpful(0)

Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS).
  • x
  • convention：
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Created Dec 29, 2018 10:20:53 Helpful(0) Helpful(0)

hi author , i think you can show us the key configuration , it will be easier for me understanding the issue .
  • x
  • convention：
Created Dec 29, 2018 14:37:49 Helpful(0) Helpful(0)

established OSPF peer with A and C respectively and belong to the same process. The OSPF of A imports the direct route. Therefore, the routing policy needs to be configured on B, C cannot receive a loopback address from A.
  • x
  • convention：
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