vii
Disabling session establishment to an IPv6 peer or peer group ···································································· 233
Logging IPv6 peer or peer group state changes
······························································································ 233
Controlling route distribution and reception ············································································································· 233
Configuration prerequisites ································································································································ 234
Configuring IPv6 BGP route redistribution
········································································································ 234
Configuring IPv6 BGP route summarization ····································································································· 234
Advertising a default route to an IPv6 peer or peer group············································································· 234
Configuring outbound route filtering ················································································································· 235
Configuring inbound route filtering ··················································································································· 236
Configuring IPv6 BGP and IGP route synchronization
···················································································· 236
Configuring route dampening···························································································································· 237
Configuring IPv6 BGP route attributes ······················································································································· 237
Configuration prerequisites ································································································································ 237
Configuring IPv6 BGP preference and default LOCAL_PREF and NEXT_HOP attributes ···························· 237
Configuring the MED attribute ··························································································································· 238
Configuring the AS_PATH attribute ··················································································································· 238
Tuning and optimizing IPv6 BGP networks ··············································································································· 239
Configuration prerequisites ································································································································ 240
Configuring IPv6 BGP timers ······························································································································ 240
Configuring IPv6 BGP soft reset
························································································································· 240
Enabling the IPv6 BGP ORF capability ············································································································· 241
Enabling 4-byte AS number suppression ·········································································································· 242
Setting the DSCP value for IPv6 BGP packets ·································································································· 243
Configuring the maximum number of ECMP routes ························································································ 243
Enabling MD5 authentication for TCP connections ························································································· 243
Configuring a large-scale IPv6 BGP network ············································································································ 244
Configuration prerequisites ································································································································ 244
Configuring IPv6 BGP peer group····················································································································· 244
Configuring IPv6 BGP community ····················································································································· 245
Configuring an IPv6 BGP route reflector··········································································································· 246
Displaying and maintaining IPv6 BGP······················································································································· 247
Displaying BGP···················································································································································· 247
Resetting IPv6 BGP connections ························································································································· 248
Clearing IPv6 BGP information ·························································································································· 248
IPv6 BGP configuration examples ······························································································································ 248
IPv6 BGP basic configuration example············································································································· 249
IPv6 BGP route reflector configuration example ······························································································ 251
Troubleshooting IPv6 BGP configuration ··················································································································· 252
IPv6 BGP peer relationship not established
······································································································ 252
Configuring routing policies ··································································································································· 253
Introduction to routing policy ······································································································································ 253
Routing policy application·································································································································· 253
Routing policy implementation ··························································································································· 253
Filters····································································································································································· 253
Defining filters······························································································································································· 255
Configuration prerequisites ································································································································ 255
Defining an IP prefix list······································································································································ 255
Defining an AS path list ······································································································································ 256
Defining a community list ··································································································································· 256
Defining an extended community list ················································································································ 257
Configuring a routing policy······································································································································· 257
Configuration prerequisites ································································································································ 257
Creating a routing policy ··································································································································· 257
Defining if-match clauses ···································································································································· 258