Users Guide

Table Of Contents
BFD three-way handshake......................................................................................................................................768
BFD configuration..................................................................................................................................................... 769
Configure BFD globally............................................................................................................................................ 769
BFD for BGP...............................................................................................................................................................770
BFD for OSPF.............................................................................................................................................................774
BFD for Static routes............................................................................................................................................... 778
BFD commands...........................................................................................................................................................781
Border Gateway Protocol..............................................................................................................................................787
Sessions and peers................................................................................................................................................... 789
Martian addresses.....................................................................................................................................................789
Route reflectors........................................................................................................................................................ 790
Multiprotocol BGP.................................................................................................................................................... 790
Attributes..................................................................................................................................................................... 791
Disable announcement of ASN values.................................................................................................................. 791
Selection criteria........................................................................................................................................................ 791
Weight and local preference...................................................................................................................................792
Multiexit discriminators............................................................................................................................................792
Origin............................................................................................................................................................................ 793
AS path and next-hop.............................................................................................................................................. 793
Best path selection................................................................................................................................................... 794
More path support.................................................................................................................................................... 794
Advertise cost............................................................................................................................................................795
4-Byte AS numbers...................................................................................................................................................795
AS number migration................................................................................................................................................795
Graceful restart......................................................................................................................................................... 796
Configure Border Gateway Protocol.................................................................................................................... 796
Enable BGP................................................................................................................................................................. 797
BGP over unnumbered interfaces.........................................................................................................................799
Auto-unnumbered interfaces for BGP..................................................................................................................801
Configure Dual Stack............................................................................................................................................... 805
Configure administrative distance........................................................................................................................ 805
Peer templates.......................................................................................................................................................... 806
Neighbor fall-over......................................................................................................................................................810
Configure password................................................................................................................................................... 811
Fast external fallover................................................................................................................................................ 813
Passive peering...........................................................................................................................................................814
Local AS....................................................................................................................................................................... 815
AS number limit.......................................................................................................................................................... 816
Redistribute routes.................................................................................................................................................... 817
Additional paths..........................................................................................................................................................818
MED attributes........................................................................................................................................................... 818
Local preference attribute.......................................................................................................................................819
Weight attribute........................................................................................................................................................ 820
Enable multipath........................................................................................................................................................820
Route-map filters.......................................................................................................................................................821
Route reflector clusters........................................................................................................................................... 821
Aggregate routes...................................................................................................................................................... 822
Confederations.......................................................................................................................................................... 823
Route dampening...................................................................................................................................................... 823
Timers.......................................................................................................................................................................... 825
Contents
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