Deployment Guide
Disabling BFD for BGP.............................................................................................................................................155
Use BFD in a BGP Peer Group............................................................................................................................... 156
Displaying BFD for BGP Information......................................................................................................................156
Congure BFD for VRRP...............................................................................................................................................160
Related Conguration Tasks....................................................................................................................................160
Establishing Sessions with All VRRP Neighbors....................................................................................................161
Establishing VRRP Sessions on VRRP Neighbors................................................................................................ 161
Changing VRRP Session Parameters.....................................................................................................................162
Disabling BFD for VRRP.......................................................................................................................................... 162
Congure BFD for VLANs............................................................................................................................................. 163
Related Conguration Task......................................................................................................................................163
Establish Sessions with VLAN Neighbors............................................................................................................. 164
Changing VLAN Session Parameters.....................................................................................................................164
Disabling BFD for VLANs.........................................................................................................................................165
Congure BFD for Port-Channels................................................................................................................................165
Related Conguration Tasks....................................................................................................................................165
Establish Sessions on Port-Channels.....................................................................................................................166
Changing Physical Port Session Parameters........................................................................................................ 166
Disabling BFD for Port-Channels............................................................................................................................167
Conguring Protocol Liveness...................................................................................................................................... 167
Troubleshooting BFD...................................................................................................................................................... 167
10 Border Gateway Protocol IPv4 (BGPv4)................................................................................................... 169
Autonomous Systems (AS)........................................................................................................................................... 169
Sessions and Peers......................................................................................................................................................... 171
Establish a Session....................................................................................................................................................171
Route Reectors.............................................................................................................................................................172
Communities..............................................................................................................................................................173
BGP Attributes................................................................................................................................................................173
Best Path Selection Criteria.................................................................................................................................... 173
Weight........................................................................................................................................................................175
Local Preference.......................................................................................................................................................175
Multi-Exit Discriminators (MEDs)...........................................................................................................................176
Origin.......................................................................................................................................................................... 177
AS Path...................................................................................................................................................................... 178
Next Hop................................................................................................................................................................... 178
Multiprotocol BGP.......................................................................................................................................................... 178
Implement BGP with the Dell Networking OS............................................................................................................ 179
Additional Path (Add-Path) Support......................................................................................................................179
Advertise IGP Cost as MED for Redistributed Routes........................................................................................ 179
Ignore Router-ID for Some Best-Path Calculations............................................................................................. 180
Four-Byte AS Numbers........................................................................................................................................... 180
AS4 Number Representation.................................................................................................................................. 180
AS Number Migration.............................................................................................................................................. 182
BGP4 Management Information Base (MIB)........................................................................................................183
Important Points to Remember.............................................................................................................................. 183
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