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

MPLS overview ·································································································································································· 1

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

MPLS network structure ············································································································································ 3

LSP establishment and label distribution ················································································································ 3

MPLS forwarding ······················································································································································ 6

LDP ············································································································································································· 8

Protocols ···································································································································································· 9

MPLS configuration task list ·············································································································································· 9

Enabling the MPLS function ··········································································································································· 10

Configuration prerequisites ·································································································································· 10

Configuration procedure ······································································································································ 11

Configuring a static LSP ················································································································································ 11

Establishing dynamic LSPs through LDP ······················································································································· 12

Configuring MPLS LDP capability ························································································································ 12

Configuring local LDP session parameters ········································································································· 13

Configuring remote LDP session parameters ······································································································ 13

Configuring PHP ···················································································································································· 14

Configuring the policy for triggering LSP establishment ··················································································· 15

Configuring the label distribution control mode ································································································ 16

Configuring LDP loop detection ··························································································································· 16

Configuring LDP MD5 authentication ·················································································································· 17

Configuring LDP label filtering ····························································································································· 17

Maintaining LDP sessions ·············································································································································· 19

Configuring BFD for MPLS LDP ···························································································································· 19

Resetting LDP sessions ··········································································································································· 20

Managing and optimizing MPLS forwarding ············································································································· 20

Configuring MPLS MTU ········································································································································ 20

Configuring TTL processing mode at ingress ······································································································ 21

Sending back ICMP TTL exceeded messages for MPLS TTL expired packets ················································· 22

Configuring LDP GR ·············································································································································· 23

Configuring MPLS statistics collection and reading ··································································································· 25

Setting MPLS statistics reading interval ··············································································································· 25

Inspecting LSPs ······························································································································································· 26

Configuring MPLS LSP ping ·································································································································· 26

Configuring MPLS LSP tracert ······························································································································· 26

Configuring BFD for LSPs ······································································································································ 26

Configuring periodic LSP tracert ·························································································································· 28

Enabling MPLS trap························································································································································ 28

Displaying and maintaining MPLS ······························································································································· 29

Displaying MPLS operation ·································································································································· 29

Displaying MPLS LDP operation ··························································································································· 30

Clearing MPLS statistics ········································································································································ 31

MPLS configuration examples ······································································································································· 31

Configuring static LSPs ·········································································································································· 32

Configuring LDP to establish LSPs dynamically ·································································································· 34