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Changing VRRP Session Parameters.......................................................................................... 168
Disabling BFD for VRRP...............................................................................................................169
Configure BFD for VLANs................................................................................................................. 169
Related Configuration Task.........................................................................................................170
Establish Sessions with VLAN Neighbors....................................................................................170
Changing VLAN Session Parameters...........................................................................................171
Disabling BFD for VLANs..............................................................................................................171
Configure BFD for Port-Channels.....................................................................................................171
Related Configuration Tasks....................................................................................................... 172
Establish Sessions on Port-Channels..........................................................................................172
Changing Physical Port Session Parameters.............................................................................. 173
Disabling BFD for Port-Channels................................................................................................173
Configuring Protocol Liveness..........................................................................................................173
Troubleshooting BFD........................................................................................................................ 174
9 Border Gateway Protocol IPv4 (BGPv4).......................................................175
Autonomous Systems (AS)................................................................................................................ 175
Sessions and Peers............................................................................................................................ 177
Establish a Session.......................................................................................................................178
Route Reflectors................................................................................................................................179
Communities............................................................................................................................... 179
BGP Attributes...................................................................................................................................180
Best Path Selection Criteria........................................................................................................ 180
Weight..........................................................................................................................................182
Local Preference......................................................................................................................... 182
Multi-Exit Discriminators (MEDs)................................................................................................183
Origin........................................................................................................................................... 184
AS Path.........................................................................................................................................185
Next Hop......................................................................................................................................185
Multiprotocol BGP............................................................................................................................ 186
Implement BGP with the Dell Networking OS.................................................................................186
Additional Path (Add-Path) Support........................................................................................... 186
Advertise IGP Cost as MED for Redistributed Routes................................................................186
Ignore Router-ID for Some Best-Path Calculations..................................................................187
Four-Byte AS Numbers................................................................................................................187
AS4 Number Representation...................................................................................................... 188
AS Number Migration..................................................................................................................190
BGP4 Management Information Base (MIB)...............................................................................191
Important Points to Remember.................................................................................................. 191
Configuration Information................................................................................................................192
BGP Configuration............................................................................................................................ 193
Enabling BGP...............................................................................................................................194
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