Datasheet

Manual:MPLS

Forwarding Table

Sub-menu: /mpls forwarding-table

Entries in this sub-menu shows label bindings for specific routes that will be used in MPLS label switching.

Properties in this menu are read-only

Property Description

bytes (integer) Total number of packet bytes matched by this entry

destination (IP/Mask) Destination prefix for which labels are assigned

in-label (integer) Label number for incoming packet

interface (string)

ldp (yes | no) Whether labels are LDP signaled

nexthop (IP) IP address of the nexthop

out-label (integer) Label number which is added or switched to for outgoing packet.

packets (integer) Number of packets matched by this entry

traffic-eng (yes | no) Shows whether entry is signaled by RSVP-TE (Traffic Engineering)

vpls (yes | no) Shows whether entry is used for VPLS tunnels.

For example we have forwarding table as shown below.

[admin@RB493G] /mpls forwarding-table> print

Flags: L - ldp, V - vpls, T - traffic-eng

# IN-LABEL OUT-LABELS DESTINATION IN NEXTHOP

0 expl-null

1 L 105 10.255.255.36/32 lo 10.5.101.36

2 L 120 112 3.3.3.1/32 lo 10.5.101.3

3 L 121 113 3.3.3.2/32 lo 10.5.101.3

[admin@RB493G] /mpls forwarding-table>

You can see that all labels are LDP signaled. Note that for entry #1 there is no out-label, it means that MPLS label

switching will not occur, packet will be sent out as regular IP packet. In the other hand entry #2 has in-label and

out-label, which means that during packet forwarding label will be switched from 120 to 112.

Interface

Sub-menu: /mpls interface

This menu allows to configure MTUs including MPLS headers that interface can forward without fragmentation.

Note: If Ethernet card does not support Jumbo frames, then MPLS MTU for all interfaces on all devices

participating in LSP should be set to 1500

Properties