Configuring basic MPLS ·············································································································································· 1

Overview ············································································································································································ 1

Basic concepts ·························································································································································· 1

MPLS network architecture ······································································································································ 2

LSP establishment ······················································································································································ 3

MPLS forwarding ······················································································································································ 4

PHP ············································································································································································· 4

Protocols and standards ·········································································································································· 5

MPLS configuration task list ·············································································································································· 5

Enabling MPLS ··································································································································································· 5

Configuring MPLS MTU ···················································································································································· 6

Specifying the label type advertised by the egress ······································································································· 7

Configuring TTL propagation ··········································································································································· 7

Enabling sending of MPLS TTL-expired messages ········································································································· 9

Enabling MPLS forwarding statistics ······························································································································· 9

Enabling FTN forwarding statistics ························································································································· 9

Enabling MPLS label forwarding statistics ·········································································································· 10

Enabling SNMP notifications for MPLS ························································································································ 10

Displaying and maintaining MPLS ······························································································································· 10

Configuring a static LSP ············································································································································· 12

Configuration prerequisites ··········································································································································· 12

Configuration procedure ··············································································································································· 12

Displaying static LSPs ····················································································································································· 13

Static LSP configuration example ································································································································· 13

Configuring LDP ························································································································································· 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 ······························································································································· 25

Configuring Hello parameters ······································································································································ 25

Configuring LDP session parameters ···························································································································· 26

Configuring LDP backoff ··············································································································································· 27

Configuring LDP MD5 authentication ·························································································································· 27

Configuring LDP to redistribute BGP IPv4 unicast routes ··························································································· 28

Configuring an LSP generation policy ························································································································· 28

Configuring the LDP label distribution control mode ·································································································· 29

Configuring a label advertisement policy ··················································································································· 29