Multicast and Routing Guide K/KA/KB.15.15

Configuration procedure..............................................................................................313
Tuning and optimizing BGP networks.................................................................................314
Prerequisites...............................................................................................................314
Configuring a BGP keepalive interval and holdtime.........................................................314
Configuring a large scale BGP network..............................................................................315
Prerequisites...............................................................................................................315
Configuring a BGP route reflector..................................................................................315
Configuring BGP graceful restart (GR).................................................................................315
Displaying information about BGP configuration.......................................................................316
Displaying BGP information...............................................................................................316
BGP configuration examples..................................................................................................317
BGP basic configuration...................................................................................................317
Network requirements..................................................................................................317
Configuration procedure..............................................................................................317
Route filter configuration...................................................................................................320
Network requirements..................................................................................................320
Configuration procedure..............................................................................................320
BGP route reflector configuration........................................................................................322
Network requirements..................................................................................................322
Configuration procedure..............................................................................................322
BGP path selection configuration........................................................................................324
Network requirements..................................................................................................324
Configuration procedure..............................................................................................325
BGP GR configuration......................................................................................................328
Network requirements..................................................................................................328
Configuration procedure..............................................................................................329
Verification.................................................................................................................330
BGP show routines................................................................................................................330
BGP solution use cases..........................................................................................................335
Solution 1 — Campus iBGP..............................................................................................335
Solution 2 — Remote site iBGP..........................................................................................337
Troubleshooting BGP.............................................................................................................338
Event log messages..........................................................................................................338
Debug log messages........................................................................................................338
No BGP peer relationship established................................................................................338
Index.......................................................................................................339
14 Contents