BGP neighbor received routes

[Kashish_Patel]

What is the difference between "sh ip bgp neighbor <> routes" and "sh ip bgp neighbor <> received-routes"?

[Harold Ritter · Accepted solution]

Hi Kashish,

Here's the definition from the documentation:

routes:

Displays all routes that are received and  accepted. The output  displayed when this keyword is entered is a subset  of the output  displayed by the received-routes keyword.

received-routes:

Displays all received routes (both accepted and rejected) from the specified neighbor.

The "routes" keyword shows the routes coming from agiven neighbor after the inbound policy has been applied. The "received-routes" shows the routes coming from a given neighbor before the inbound policy has been implied. The latter needs "soft-reconfiguration inbound" to be configured.

Regards

[Kashish_Patel]

Thnx Harold.

This part is not clear to me:

>> The latter needs "soft-reconfiguration inbound" to be configured.

Could you explain this?

[Harold Ritter · Accepted solution]

Hi Kashish,

The function of the "soft-reconfiguration inbound" command is to keep all prefixes in local memory even if they have been rejected by the inbound policy. Without this command, prefixes rejected by the inbound policy are not kept in memory and therefore "show ip bgp neighbor received-routes" is unable to show these rejected prefixes.

If you enter the "show ip bgp neighbor received-routes" command without "soft-reconfiguration inbound" being configured for the specific neighbor, IOS will issue the following message:

Test#sh ip bgp neighbors 192.168.12.2 received-routes

% Inbound soft reconfiguration not enabled on 192.168.12.2

Test#

Regards

[Kashish_Patel]

Thanks so much!