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Configuring the AS_PATH attribute ··················································································································· 225
Tuning and optimizing BGP networks ························································································································ 230
Configuring the keepalive interval and hold time ···························································································· 230
Configuring the interval for sending updates for the same route ··································································· 232
Enabling BGP to establish an EBGP session over multiple hops ···································································· 232
Enabling immediate reestablishment of direct EBGP connections upon link failure····································· 233
Enabling 4-byte AS number suppression ·········································································································· 234
Enabling MD5 authentication for BGP peers ··································································································· 234
Configuring BGP load balancing ······················································································································ 235
Configuring IPsec for IPv6 BGP ························································································································· 236
Disabling BGP to establish a session to a peer or peer group ······································································ 237
Configuring BGP soft-reset·································································································································· 238
Protecting an EBGP peer when memory usage reaches level 2 threshold ···················································· 242
Configuring a large-scale BGP network ···················································································································· 243
Configuring BGP community ······························································································································ 243
Configuring BGP route reflection ······················································································································· 244
Configuring a BGP confederation ····················································································································· 246
Configuring BGP GR ··················································································································································· 247
Enabling SNMP notifications for BGP························································································································ 248
Enabling logging of session state changes ··············································································································· 248
Configuring BFD for BGP ············································································································································ 249
Configuring BGP FRR ··················································································································································· 249
Configuring 6PE ··························································································································································· 252
Configuring basic 6PE ········································································································································ 253
Configuring optional 6PE capabilities ·············································································································· 253
Displaying and maintaining BGP ······························································································································· 255
IPv4 BGP configuration examples ······························································································································ 257
Basic BGP configuration example ····················································································································· 257
BGP and IGP route redistribution configuration example ··············································································· 261
BGP route summarization configuration example ··························································································· 264
BGP load balancing configuration example ···································································································· 267
BGP community configuration example ············································································································ 270
BGP route reflector configuration example······································································································· 273
BGP confederation configuration example ······································································································· 276
BGP path selection configuration example······································································································· 280
BGP GR configuration example ························································································································· 283
BFD for BGP configuration example ················································································································· 285
BGP FRR configuration example ························································································································ 288
IPv6 BGP configuration examples ······························································································································ 292
IPv6 BGP basic configuration example ············································································································· 292
IPv6 BGP route reflector configuration example ······························································································ 295
6PE configuration example ································································································································ 298
BFD for IPv6 BGP configuration example ········································································································· 301
IPv6 BGP FRR configuration example················································································································ 304
IPsec for IPv6 BGP packets configuration example ························································································· 308
Troubleshooting BGP ··················································································································································· 312
Symptom ······························································································································································· 312
Analysis ································································································································································ 312
Solution ································································································································································· 313
Configuring PBR ······················································································································································ 314
Introduction to PBR ······················································································································································· 314
Policy ···································································································································································· 314
PBR and Track ······················································································································································ 315
PBR configuration task list ··········································································································································· 315
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