Monitoring Layer 2 Services over MPLS

You can monitor layer 2 services over MPLS using the show mpls interface [ shim ] and the show mpls forwarding commands.

    show mpls interface
show mpls interface shim

• Use to display status and configuration information about MPLS interfaces.
• When the keyword shim is specified instead of a particular interface, all shim interfaces are displayed. Otherwise, the specified interface is displayed.
• Field descriptions

• Interface - specifier and status of each interface
• base-LSP/remote-addr - identifies either the tunnel that is selected to forward the traffic, or the address of the router at the other end.
• group-id - group ID number for the interface
• vc-id - VC ID number for the interface
• state/in/out-label - status of the layer 2 over MPLS connection or the incoming/outgoing VC label
• mtu - maximum transmission unit for the interface
• Mpls Statistics

• pkts - number of packets received or sent
• hcPkts - number of high-capacity (64-bit) packets received or sent
• octets - number of octets received or sent
• hcOctets - number of high-capacity (64-bit) octets received or sent
• errors - number of packets that are dropped for some reason at receipt or before being sent
• discardPkts - number of packets that are discarded due to lack of buffer space at receipt or before being sent

• Examples

host1:two#show mpls interface shim brief

Interface              base-LSP/remote-addr  group-id vc-id  state/in/out-label

serial4/1:1/1.1        tun mpls:1            0        1      20       45

serial4/1:1/1.2        tun mpls:1            0        2      21       46

serial4/1:1/1.3        tun mpls:1            0        3      22       47

host1:two#show mpls interface shim

serial4/1:1/1.1

  base LSP tun mpls:1 to 222.9.1.3

  group-id 0 vc-id 1 mtu 1600

  State UP

  In  Label 20 on stack

    0 pkts, 0 hcPkts, 0 octets

    0 hcOctets, 0 errors, 0 discardPkts

  Out Label 45 on tun mpls:1

    0 pkts, 0 hcPkts, 0 octets

    0 hcOctets, 0 errors, 0 discardPkts

    show mpls forwarding

• Use to display configuration and statistics for all label-switching paths (LSPs) or for specific LSPs configured on the label-switching router (LSR).
• Field descriptions

• name/id - interface specifier
• destination - destination ip address
• In label - label sent to upstream neighbor for route
• Out label - label received from downstream neighbor for route
• pkts - number of packets sent across tunnel
• hcPkts - number of high-capacity (64-bit) packets sent across tunnel
• octets - number of octets sent across tunnel
• hcOctets - number of high-capacity (64-bit) octets sent across tunnel
• errors - number of packets that are dropped for some reason before being sent
• discardPkts - number of packets that are discarded due to lack of buffer space before being sent

• Examples

host1:two#show mpls forwarding brief

name/id               destination        label/intf

serial4/1:1/1.1       222.9.1.3          In  20

                                         Out 45 on tun mpls:1 nbr 222.9.1.3

serial4/1:1/1.2       222.9.1.3          In  21

                                         Out 46 on tun mpls:1 nbr 222.9.1.3

host1:two#show mpls forwarding

serial4/1:1/1/1/1/1.1 to   222.9.1.3

  In  label 20

    0 pkts, 0 hcPkts, 0 octets

    0 hcOctets, 0 errors, 0 discardPkts

  Out label 45 on tun mpls:1 nbr 222.9.1.3

    0 pkts, 0 hcPkts, 0 octets

    0 hcOctets, 0 errors, 0 discardPkts