Route Filtering

The amount of control you have over routes in BGP is incredible—so much so, that we could dedicate an entire chapter to controlling BGP routes. However, that would be beyond the scope of the book and the TSHOOT exam. What we want to be able to do while troubleshooting missing routes is determine whether there is a route filter applied and if it is the cause of the missing routes. Example 18-34 displays the BGP table on R5 using the show bgp ipv4 unicast command. Notice that there is no entry for 10.1.13.0/24.

Example 18-34 Verifying Missing Routes on R5

Click here to view code image

R5#show bgp ipv4 unicastBGP table version is 10, local router ID is 5.5.5.5Status codes: s suppressed, d damped, h history, * valid, > best, i - ...

Get CCNP Routing and Switching TSHOOT 300-135: Official Cert Guide now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial