Date created: 08/12/19 20:14:48. Last modified: 08/12/19 20:14:48

Show Egress MPLS Label Stack

It is possible to show the egress MPLS label stack on a Nokia LSR, similar to "show cef exact-route" on Cisco IOS.

Below in the example a Nokia PE is connected to two P nodes with ECMP routing so multiple paths are shown:

*A:sr12.lab# show router fib 1 10.0.0.40/32 extensive
===============================================================================
FIB Display (Router: Base)
===============================================================================
Dest Prefix : 10.0.0.40/32
Protocol : ISIS
Installed : Y
Next-Hop : 10.0.130.198
Interface : base_pr4.lab_1
QoS : Priority=n/c, FC=n/c
Source-Class : 0
Dest-Class : 0
ECMP-Weight : 1
Next-Hop : 10.0.134.226
Interface : base_pr2.lab_1
QoS : Priority=n/c, FC=n/c
Source-Class : 0
Dest-Class : 0
ECMP-Weight : 1
===============================================================================
Total Entries : 1
===============================================================================



*A:sr12.lab# show router tunnel-table 10.0.0.40/32
===============================================================================
IPv4 Tunnel Table (Router: Base)
===============================================================================
Destination Owner Encap TunnelId Pref Nexthop Metric
-------------------------------------------------------------------------------
10.0.0.40/32 sdp MPLS 25540 5 10.0.0.40 0
10.0.0.40/32 ldp MPLS 104914 9 10.0.130.198 200000
10.0.0.40/32 ldp MPLS 104914 9 10.0.134.226 200000
-------------------------------------------------------------------------------
Flags: B = BGP backup route available
E = inactive best-external BGP route
===============================================================================



*A:sr12.lab# show router tunnel-table 10.0.0.40/32 detail
===============================================================================
Tunnel Table (Router: Base)
===============================================================================
Destination : 10.0.0.40/32
NextHop : 10.0.0.40
Tunnel Flags : (Not Specified)
Age : 20h20m22s
CBF Classes : (Not Specified)
Owner : sdp Encap : MPLS
Tunnel ID : 25540 Preference : 5
Tunnel Label : - Tunnel Metric : 0
Tunnel MTU : 8192 Max Label Stack : 1
-------------------------------------------------------------------------------
Destination : 10.0.0.40/32
NextHop : 10.0.130.198
Tunnel Flags : (Not Specified)
Age : 18h33m42s
CBF Classes : (Not Specified)
Owner : ldp Encap : MPLS
Tunnel ID : 104914 Preference : 9
Tunnel Label : 99145 Tunnel Metric : 200000
Tunnel MTU : 8204 Max Label Stack : 1
-------------------------------------------------------------------------------
Destination : 10.0.0.40/32
NextHop : 10.0.134.226
Tunnel Flags : (Not Specified)
Age : 18h33m42s
CBF Classes : (Not Specified)
Owner : ldp Encap : MPLS
Tunnel ID : 104914 Preference : 9
Tunnel Label : 24031 Tunnel Metric : 200000
Tunnel MTU : 8204 Max Label Stack : 1
-------------------------------------------------------------------------------
Number of tunnel-table entries : 3
Number of tunnel-table entries with LFA : 0
===============================================================================

It can be seen that the egress transport label will be 99145 when sending traffic via the P node with IP address 10.0.130.198 and label 24031 will be used when sending the traffic via the P node with IP 10.0.134.226.


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