Configuration Guide Vol. 3


14.3.9 Checking BGP4 advertised routes [SL-L3A]

To check which routes are advertised by BGP4, execute the show ip bgp operation command with the advertised-routes parameter specified.

Figure 14-19: BGP4 advertised route display
> show ip bgp advertised-routes
Date 20XX/07/14 12:00:00 UTC
BGP Peer: 177.7.7.145    , Remote AS: 2000
Local AS: 1000, Local Router ID: 192.168.1.1
Origin Codes: i - IGP, e - EGP, ? - incomplete
Network              Next Hop        MED    LocalPref Path
200.1/24             177.2.2.1       0      -         1000 2100 i
200.200.1/24         177.2.2.1       0      -         1000 2100 i

To include detailed information about route attributes in the command output, use the show ip bgp operation command with the advertised-routes and -F parameters specified. Use this method to check the ORIGIN, AS_PATH, MED, LOCAL_PREF, and COMMUNITIES attributes of the routes.

Figure 14-20: Example of displaying BGP4 advertised routes (detailed display)
> show ip bgp advertised-routes -F
Date 20XX/07/14 12:00:00 UTC
BGP Peer: 177.7.7.145    , Remote AS: 2000
Local AS: 1000, Local Router ID: 192.168.1.1
Status Codes: d dampened, * valid, > active, S Stale, r RIB failure
Route 200.1/24
*> Next Hop 177.2.2.1
     MED:0, LocalPref: -, Type: External route
     Origin: IGP
     Path: 1000 2100
     Next Hop Attribute: 177.2.2.1
     Communities: 1020:1200
Route 110.10/24
*> Next Hop 2.2.2.2
     MED: 0, LocalPref: -, Type: External route
     Origin: IGP
     Path: 1000 2100
     Next Hop Attribute: 177.2.2.1
     Communities: 1020:1200