Users Guide

Table Of Contents
14 Layer 3................................................................................................................................... 474
Virtual routing and forwarding......................................................................................................................................... 474
Configure management VRF......................................................................................................................................474
Configure non-default VRF instances.......................................................................................................................476
VRF configuration........................................................................................................................................................478
View VRF instance information................................................................................................................................. 482
Static route leaking..................................................................................................................................................... 482
VRF commands........................................................................................................................................................... 486
Bidirectional Forwarding Detection.................................................................................................................................493
BFD session states......................................................................................................................................................493
BFD three-way handshake.........................................................................................................................................494
BFD configuration....................................................................................................................................................... 495
Configure BFD globally............................................................................................................................................... 495
BFD for BGP................................................................................................................................................................ 496
BFD for OSPF..............................................................................................................................................................500
BFD for Static routes..................................................................................................................................................504
BFD commands........................................................................................................................................................... 506
Border Gateway Protocol..................................................................................................................................................511
Sessions and peers.......................................................................................................................................................512
Route reflectors........................................................................................................................................................... 513
Multiprotocol BGP....................................................................................................................................................... 513
Attributes...................................................................................................................................................................... 514
Selection criteria...........................................................................................................................................................514
Weight and local preference.......................................................................................................................................515
Multiexit discriminators............................................................................................................................................... 515
Origin............................................................................................................................................................................. 516
AS path and next-hop................................................................................................................................................. 516
Best path selection...................................................................................................................................................... 516
More path support....................................................................................................................................................... 517
Advertise cost...............................................................................................................................................................517
4-Byte AS numbers......................................................................................................................................................517
AS number migration...................................................................................................................................................518
Graceful restart............................................................................................................................................................ 518
Configure Border Gateway Protocol.........................................................................................................................519
Enable BGP...................................................................................................................................................................519
Disable announcements of ASN values....................................................................................................................522
Configure Dual Stack.................................................................................................................................................. 522
Configure administrative distance.............................................................................................................................522
Peer templates.............................................................................................................................................................523
Neighbor fall-over........................................................................................................................................................526
Configure password....................................................................................................................................................528
Fast external fallover.................................................................................................................................................. 529
Passive peering.............................................................................................................................................................531
Local AS.........................................................................................................................................................................531
AS number limit............................................................................................................................................................532
Redistribute routes......................................................................................................................................................533
Additional paths........................................................................................................................................................... 533
MED attributes............................................................................................................................................................ 534
Local preference attribute..........................................................................................................................................534
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