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

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

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

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

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

PHP ···························································································································································· 5

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

Restrictions and guidelines for basic MPLS ······································································································· 5

MPLS configuration task list ······························································································································· 6

Enabling MPLS ·················································································································································· 6

Setting MPLS MTU ············································································································································ 7

Specifying the label type advertised by egress ·································································································· 8

Configuring TTL propagation ····························································································································· 8

Enabling sending MPLS TTL-expired messages ····························································································· 10

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

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

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

Restrictions and guidelines for static LSP ········································································································ 12

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

Configuration procedure··································································································································· 13

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 ·························································································· 17

Terminology ············································································································································· 17

LDP messages ········································································································································· 17

LDP operation ·········································································································································· 18

Label distribution and control ··················································································································· 19

LDP GR ···················································································································································· 21

LDP NSR ·················································································································································· 22

LDP-IGP synchronization ························································································································· 22

LDP FRR ·················································································································································· 23

LDP over MPLS TE ·································································································································· 24

Protocols ·················································································································································· 25

Restrictions and guidelines for LDP ················································································································· 25

LDP configuration task list································································································································ 25

Enabling LDP ··················································································································································· 26

Enabling LDP globally ······························································································································ 26

Enabling LDP on an interface ·················································································································· 26

Configuring Hello parameters ·························································································································· 27

Configuring LDP session parameters ·············································································································· 27

About LDP session parameters ··············································································································· 27

Restrictions and guidelines ······················································································································ 28

Configuring LDP backoff ·································································································································· 30

Configuring LDP MD5 authentication ··············································································································· 30

Configuring LDP to redistribute BGP unicast routes ························································································ 31

Configuring an LSP generation policy ·············································································································· 31

Configuring the LDP label distribution control mode ························································································ 32

Configuring a label advertisement policy ········································································································· 32