Part number: 797711-001
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Configuring basic MPLS ·············································································································································· 1  Overview ············································································································································································ 1 
Basic concepts ·························································································································································· 1  MPLS network architecture ······································································································································ 3  LSP establishment ······················································································································································ 3  MPLS forwarding ······················································································································································ 4  PHP ············································································································································································· 5  Protocols and standards ·········································································································································· 5 
MPLS configuration task list ·············································································································································· 5  Enabling MPLS ··································································································································································· 6  Configuring MPLS MTU ···················································································································································· 6  Specifying the label type advertised by the egress ······································································································· 7  Configuring TTL propagation ··········································································································································· 8  Enabling sending of MPLS TTL-expired messages ········································································································· 9  Enabling MPLS forwarding statistics ···························································································································· 10  Enabling SNMP notifications for MPLS ························································································································ 10  Displaying and maintaining MPLS ······························································································································· 10 
Configuring a static LSP ············································································································································· 12  Overview ········································································································································································· 12  Configuration prerequisites ··········································································································································· 12  Configuration procedure ··············································································································································· 12  Displaying static LSPs ····················································································································································· 13  Static LSP configuration example ································································································································· 13 
Network requirements ··········································································································································· 13  Configuration restrictions and guidelines ··········································································································· 14  Configuration procedure ······································································································································ 14  Verifying the configuration ··································································································································· 15 
Configuring LDP ························································································································································· 16  Overview ········································································································································································· 16 
Terminology ··························································································································································· 16  LDP messages ························································································································································· 16  LDP operation ························································································································································· 17  Label distribution and control ······························································································································· 18  LDP GR ···································································································································································· 20  LDP NSR ································································································································································· 21  LDP-IGP synchronization ······································································································································· 22  LDP FRR ··································································································································································· 23  Protocols ································································································································································· 23 
LDP configuration task list ·············································································································································· 23  Enabling LDP ··································································································································································· 24 
Enabling LDP globally ··········································································································································· 24  Enabling LDP on an interface ······························································································································· 24 
Configuring Hello parameters ······································································································································ 25  Configuring LDP session parameters ···························································································································· 26  Configuring LDP backoff ··············································································································································· 27  Configuring LDP MD5 authentication ·························································································································· 27  Configuring an LSP generation policy ························································································································· 28  Configuring the LDP label distribution control mode ·································································································· 28 
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Configuring a label advertisement policy ··················································································································· 29  Configuring a label acceptance policy ······················································································································· 30  Configuring LDP loop detection ···································································································································· 31  Configuring LDP session protection ······························································································································ 31  Configuring LDP GR ······················································································································································· 32  Configuring LDP NSR ····················································································································································· 32  Configuring LDP-IGP synchronization ·························································································································· 32 
Configuring LDP-OSPF synchronization ·············································································································· 33  Configuring LDP-ISIS synchronization ················································································································· 34 
Configuring LDP FRR ······················································································································································ 35  Resetting LDP sessions ···················································································································································· 35  Enabling SNMP notifications for LDP ··························································································································· 35  Displaying and maintaining LDP ·································································································································· 35  LDP configuration examples ·········································································································································· 36 
LDP LSP configuration example ···························································································································· 36  Label acceptance control configuration example ······························································································ 40  Label advertisement control configuration example ·························································································· 44  LDP FRR configuration example ··························································································································· 49 
Configuring MPLS TE ················································································································································· 53  Overview ········································································································································································· 53 
TE and MPLS TE ····················································································································································· 53  MPLS TE basic concepts········································································································································ 53  Static CRLSP establishment ··································································································································· 53  Dynamic CRLSP establishment ····························································································································· 53  Traffic forwarding ·················································································································································· 55  Make-before-break ················································································································································ 56  Route pinning ························································································································································· 57  Tunnel reoptimization ············································································································································ 57  Automatic bandwidth adjustment ························································································································ 57  CRLSP backup ························································································································································ 58  FRR ···························