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Configuring the interval for sending updates for the same route ··································································· 225

Enabling BGP to establish an EBGP session over multiple hops ···································································· 225

Enabling immediate reestablishment of direct EBGP connections upon link failure····································· 226

Enabling 4-byte AS number suppression ·········································································································· 227

Enabling MD5 authentication for BGP peers ··································································································· 227

Configuring BGP load balancing ······················································································································ 228

Configuring IPsec for IPv6 BGP ························································································································· 229

Disabling BGP to establish a session to a peer or peer group ······································································ 230

Configuring BGP soft-reset·································································································································· 230

Protecting an EBGP peer when memory usage reaches level 2 threshold ···················································· 234

Configuring a large-scale BGP network ···················································································································· 235

Configuring BGP community ······························································································································ 235

Configuring BGP route reflection ······················································································································· 237

Configuring a BGP confederation ····················································································································· 239

Configuring BGP GR ··················································································································································· 240

Enabling SNMP notifications for BGP························································································································ 241

Enabling logging of session state changes ··············································································································· 241

Configuring BFD for BGP ············································································································································ 242

Configuring 6PE ··························································································································································· 243

Configuring basic 6PE ········································································································································ 243

Configuring optional 6PE capabilities ·············································································································· 244

Displaying and maintaining BGP ······························································································································· 245

IPv4 BGP configuration examples ······························································································································ 248

Basic BGP configuration example ····················································································································· 248

BGP and IGP route redistribution configuration example ··············································································· 252

BGP route summarization configuration example ··························································································· 255

BGP load balancing configuration example ···································································································· 258

BGP community configuration example ············································································································ 261

BGP route reflector configuration example······································································································· 264

BGP confederation configuration example ······································································································· 267

BGP path selection configuration example······································································································· 271

BGP GR configuration example ························································································································· 274

BFD for BGP configuration example ················································································································· 276

IPv6 BGP configuration examples ······························································································································ 279

IPv6 BGP basic configuration example ············································································································· 279

IPv6 BGP route reflector configuration example ······························································································ 282

6PE configuration example ································································································································ 285

BFD for IPv6 BGP configuration example ········································································································· 288

IPsec for IPv6 BGP packets configuration example ························································································· 291

Troubleshooting BGP ··················································································································································· 295

Symptom ······························································································································································· 295

Analysis ································································································································································ 296

Solution ································································································································································· 296

Configuring PBR ······················································································································································ 297

Introduction to PBR ······················································································································································· 297

Policy ···································································································································································· 297

PBR and Track ······················································································································································ 299

PBR configuration task list ··········································································································································· 299

Configuring a policy ···················································································································································· 300

Creating a node ·················································································································································· 300

Configuring match criteria for a node ·············································································································· 300

Configuring actions for a node ·························································································································· 300

Configuring local PBR ········································································································································· 302