User guide

MPLS Module Installation and User Guide 3-13

Configuring MPLS

config mpls propagate-ip-ttl [enabled |

disabled]

Enables or disables the propagation of the IP

time-to-live (TTL) field for routed IP packets.

Specify one of the following:

■

enabled — Each LSR is viewed as a router

hop from an IP TTL perspective.

■

disabled — The LSP is viewed as a

point-to-point link between the ingress LSR

and the egress LSR.

config mpls qos-mapping [dot1p-to-exp |

exp-to-dot1p] [all |

<input_value>]/<output_value>

Configures MPLS-specific QoS mappings.

Specify one of the following QoS mappings:

■

dot1p-to-exp — Mappings are used in

performing the ingress LSR function. The

value in this priority field is set based on the

QoS classification performed by the ingress

I/O module.

■

exp-to-dot1p — Mappings are used when

performing label swapping as an intermediate

LSR and when performing the egress LSR

function.

config mpls vlan [<name> | all] ip-mtu

Configures the IP MTU for frames transmitted

onto MPLS LSPs via the specified egress VLAN.

The range is 42 to 9190 (using jumbo frame

sizes). The default setting is 4 less than the IP

MTU value. By default, the IP MTU value is 1500

bytes, so the default MPLS MTU is 1496 bytes.

disable mpls Disables MPLS on the switch. Disabling MPLS

causes all LSPs to be released and all LDP

neighbor sessions to be terminated.

enable mpls Enables MPLS on the switch. By default, MPLS

is disabled.

show mpls {vlan <name>} {detail} Displays MPLS configuration information for one

or all VLANs. Omitting the vlan keyword,

displays information for all VLANs.

Table 3-5: MPLS Configuration Commands (continued)

Command Description