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Enhancing IS-IS network security ······························································································ 159
Configuration prerequisites ································································································ 159
Configuring neighbor relationship authentication ···································································· 159
Configuring area authentication ·························································································· 160
Configuring routing domain authentication ············································································ 160
Configuring IS-IS GR ·············································································································· 161
Configuring IS-IS NSR ············································································································ 162
Configuring BFD for IS-IS ········································································································ 162
Configuring IS-IS FRR ············································································································ 163
Configuration prerequisites ································································································ 163
Configuration guidelines ··································································································· 163
Configuration procedure ··································································································· 164
Displaying and maintaining IS-IS ······························································································· 165
IS-IS configuration examples ···································································································· 166
Basic IS-IS configuration example ······················································································· 166
DIS election configuration example ····················································································· 171
IS-IS route redistribution configuration example ····································································· 175
IS-IS authentication configuration example ··········································································· 178
IS-IS GR configuration example ························································································· 181
IS-IS NSR configuration example ························································································ 182
BFD for IS-IS configuration example ···················································································· 185
IS-IS FRR configuration example ························································································ 188
Configuring BGP ·········································································· 192
Overview ······························································································································ 192
BGP speaker and BGP peer ······························································································ 192
BGP message types ········································································································ 192
BGP path attributes ········································································································· 192
BGP route selection ········································································································· 196
BGP route advertisement rules ··························································································· 196
BGP load balancing ········································································································· 197
Settlements for problems in large-scale BGP networks ···························································· 198
MP-BGP ························································································································ 201
BGP multi-instance ·········································································································· 202
BGP configuration views ··································································································· 202
Protocols and standards ··································································································· 204
BGP configuration task list ······································································································· 204
Configuring basic BGP ············································································································ 207
Enabling BGP ················································································································· 207
Configuring a BGP peer ···································································································· 208
Configuring dynamic BGP peers ························································································· 210
Configuring a BGP peer group ··························································································· 213
Specifying the source address of TCP connections ································································· 223
Generating BGP routes ··········································································································· 224
Injecting a local network ···································································································· 224
Redistributing IGP routes ·································································································· 226
Controlling route distribution and reception ·················································································· 227
Configuring BGP route summarization ················································································· 227
Advertising optimal routes in the IP routing table ···································································· 229
Advertising a default route to a peer or peer group ································································· 230
Limiting routes received from a peer or peer group ································································· 232
Configuring BGP route filtering policies ················································································ 233
Configuring BGP route update delay ··················································································· 239
Configuring a startup policy for BGP route updates ································································· 239
Configuring BGP route dampening ······················································································ 240
Controlling BGP path selection ································································································· 241
Setting a preferred value for routes received ········································································· 241
Configuring preferences for BGP routes ··············································································· 243
Configuring the default local preference ··············································································· 244
Configuring the MED attribute ···························································································· 245
Configuring the NEXT_HOP attribute ··················································································· 249
Configuring the AS_PATH attribute ····················································································· 251
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