IS-IS GR configuration example ························································································································· 158

IS-IS authentication configuration example······································································································· 160

Configuring BFD for IS-IS ···································································································································· 162

Configuring BGP ····················································································································································· 167

Overview ······································································································································································· 167

BGP speaker and BGP peer ······························································································································· 167

BGP message types ············································································································································· 167

BGP path attributes ············································································································································· 168

BGP route selection ············································································································································· 172

BGP route advertisement rules ··························································································································· 172

BGP load balancing ············································································································································ 172

Settlements for problems in large-scale BGP networks ···················································································· 173

MP-BGP ································································································································································· 176

BGP configuration views ···································································································································· 177

Protocols and standards ····································································································································· 178

BGP configuration task list ·········································································································································· 179

Configuring basic BGP ················································································································································ 180

Enabling BGP ······················································································································································· 180

Configuring a BGP peer ····································································································································· 181

Configuring a BGP peer group ·························································································································· 182

Specifying the source interface for TCP connections ······················································································· 184

Generating BGP routes ················································································································································ 185

Configuration prerequisites ································································································································ 185

Injecting a local network ···································································································································· 185

Redistributing IGP routes····································································································································· 186

Controlling route distribution and reception ············································································································· 186

Configuring BGP route summarization ············································································································· 186

Advertising a default route to a peer or peer group ······················································································· 187

Configuring BGP route distribution/reception filtering policies ····································································· 188

Enabling BGP and IGP route synchronization ································································································· 190

Limiting prefixes received from a peer or peer group ····················································································· 191

Configuring BGP route dampening ··················································································································· 192

Controlling BGP path selection ··································································································································· 192

Specifying a preferred value for routes received ····························································································· 192

Configuring preferences for BGP routes ··········································································································· 193

Configure the default local preference ············································································································· 194

Configuring the MED attribute ··························································································································· 194

Configuring the NEXT_HOP attribute ················································································································ 197

Configuring the AS_PATH attribute ··················································································································· 198

Tuning and optimizing BGP networks ························································································································ 201

Configuring the BGP keepalive interval and holdtime ···················································································· 201

Configuring the interval for sending the same update ···················································································· 202

Allowing establishment of EBGP session to an indirectly connected peer or peer group ··························· 202

Enabling the BGP ORF capability······················································································································ 203

Enabling 4-byte AS number suppression ·········································································································· 204

Enabling quick reestablishment of direct EBGP session ·················································································· 204

Enabling MD5 authentication for BGP peers ··································································································· 205

Configuring BGP load balancing ······················································································································ 205

Forbidding session establishment with a peer or peer group ········································································ 206

Configuring BGP soft-reset·································································································································· 206

Configuring a large scale BGP network ···················································································································· 208

Configuring BGP community ······························································································································ 208

Configuring a BGP route reflector ····················································································································· 209