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PowerConnect B-Series FCX Configuration Guide xxvii
53-1002266-01
Optional configuration tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1004
Changing the Keep Alive Time and Hold Time . . . . . . . . . . . 1004
Changing the BGP4 next-hop update timer . . . . . . . . . . . . . 1005
Enabling fast external fallover. . . . . . . . . . . . . . . . . . . . . . . . 1005
Changing the maximum number of paths for
BGP4 load sharing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1006
Customizing BGP4 load sharing . . . . . . . . . . . . . . . . . . . . . . .1007
Specifying a list of networks to advertise. . . . . . . . . . . . . . . 1008
Changing the default local preference . . . . . . . . . . . . . . . . . 1009
Using the IP default route as a valid next hop for
a BGP4 route . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1010
Advertising the default route. . . . . . . . . . . . . . . . . . . . . . . . . .1010
Changing the default MED (Metric) used for
route redistribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1010
Enabling next-hop recursion . . . . . . . . . . . . . . . . . . . . . . . . . .1011
Changing administrative distances . . . . . . . . . . . . . . . . . . . .1014
Requiring the first AS to be the neighbor AS . . . . . . . . . . . . .1015
Disabling or re-enabling comparison of the AS-Path length .1015
Enabling or disabling comparison of the router IDs . . . . . . .1016
Configuring the Layer 3 Switch to always compare
Multi-Exit Discriminators (MEDs) . . . . . . . . . . . . . . . . . . . . . .1016
Treating missing MEDs as the worst MEDs . . . . . . . . . . . . . .1017
Configuring route reflection parameters . . . . . . . . . . . . . . . .1017
Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1021
Aggregating routes advertised to BGP4 neighbors . . . . . . . .1024
Configuring BGP4 graceful restart. . . . . . . . . . . . . . . . . . . . . . . . 1025
Configuring BGP4 graceful restart . . . . . . . . . . . . . . . . . . . . 1025
Configuring timers for BGP4 graceful restart (optional) . . . 1025
BGP null0 routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1026
Configuration steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1027
Configuration examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1028
Show commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1029
Modifying redistribution parameters . . . . . . . . . . . . . . . . . . . . . . 1030
Redistributing connected routes. . . . . . . . . . . . . . . . . . . . . . .1031
Redistributing RIP routes. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1031
Redistributing OSPF external routes. . . . . . . . . . . . . . . . . . . .1031
Redistributing static routes . . . . . . . . . . . . . . . . . . . . . . . . . . 1032
Disabling or re-enabling re-advertisement of all learned
BGP4 routes to all BGP4 neighbors . . . . . . . . . . . . . . . . . . . 1032
Redistributing IBGP routes into RIP and OSPF. . . . . . . . . . . 1033
Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1033
Filtering specific IP addresses . . . . . . . . . . . . . . . . . . . . . . . 1033
Filtering AS-paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1035
Filtering communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1038
Defining IP prefix lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1041
Defining neighbor distribute lists . . . . . . . . . . . . . . . . . . . . . 1042
Defining route maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1042
Using a table map to set the rag value. . . . . . . . . . . . . . . . . 1050
Configuring cooperative BGP4 route filtering. . . . . . . . . . . . .1051