Owners Manual

Multi-Exit Discriminators (MEDs)................................................................................................189
Origin...........................................................................................................................................190
AS Path......................................................................................................................................... 191
Next Hop...................................................................................................................................... 191
Multiprotocol BGP.............................................................................................................................192
Implement BGP with Dell Networking OS....................................................................................... 192
Additional Path (Add-Path) Support........................................................................................... 192
Advertise IGP Cost as MED for Redistributed Routes................................................................ 192
Ignore Router-ID for Some Best-Path Calculations..................................................................193
Four-Byte AS Numbers............................................................................................................... 193
AS4 Number Representation...................................................................................................... 194
AS Number Migration..................................................................................................................195
BGP4 Management Information Base (MIB)...............................................................................197
Important Points to Remember..................................................................................................197
Configuration Information................................................................................................................198
BGP Configuration............................................................................................................................198
Enabling BGP...............................................................................................................................199
Configuring AS4 Number Representations............................................................................... 203
Configuring Peer Groups............................................................................................................205
Configuring BGP Fast Fall-Over................................................................................................. 207
Configuring Passive Peering.......................................................................................................209
Maintaining Existing AS Numbers During an AS Migration........................................................210
Allowing an AS Number to Appear in its Own AS Path.............................................................. 211
Enabling Graceful Restart............................................................................................................212
Enabling Neighbor Graceful Restart........................................................................................... 213
Filtering on an AS-Path Attribute................................................................................................ 213
Regular Expressions as Filters..................................................................................................... 215
Redistributing Routes.................................................................................................................. 216
Enabling Additional Paths............................................................................................................217
Configuring IP Community Lists.................................................................................................217
Configuring an IP Extended Community List.............................................................................219
Filtering Routes with Community Lists...................................................................................... 220
Manipulating the COMMUNITY Attribute.................................................................................. 220
Changing MED Attributes........................................................................................................... 222
Changing the LOCAL_PREFERENCE Attribute.......................................................................... 222
Changing the NEXT_HOP Attribute........................................................................................... 223
Changing the WEIGHT Attribute................................................................................................ 224
Enabling Multipath...................................................................................................................... 224
Filtering BGP Routes................................................................................................................... 224
Filtering BGP Routes Using Route Maps.................................................................................... 226
Filtering BGP Routes Using AS-PATH Information.................................................................... 227
Configuring BGP Route Reflectors.............................................................................................227