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

Overview ···························································································································································· 1

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

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

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

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

PHP ···························································································································································· 5

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

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

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

Setting MPLS MTU ············································································································································ 6

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

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

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

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

Enabling split horizon for MPLS forwarding ····································································································· 10

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

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

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

Configuration guidelines ·································································································································· 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 ···················································································································································· 20

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

LDP over MPLS TE ·································································································································· 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 ··············································································································· 28

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

Configuring an LSP generation policy ·············································································································· 29

Configuring the LDP label distribution control mode ························································································ 30

Configuring a label advertisement policy ········································································································· 30

Configuring a label acceptance policy ············································································································· 31

Configuring LDP loop detection ······················································································································· 32

Configuring LDP session protection ················································································································· 33

Configuring LDP GR ········································································································································ 33