[c-nsp] MPLS TE Load Balancing

omar parihuana omar.parihuana at gmail.com
Thu Mar 29 20:28:28 EDT 2012


Hi Group,

I'm wondering about a strange behaviour about MPLS TE on ASR9K

I have two MPLS TE tunnels (with autoroute announce):

RP/0/RSP0/CPU0:9K6-413#show route 10.100.100.7
Thu Mar 29 23:09:49.818 UTC

Routing entry for 10.100.100.7/32
  Known via "isis BACKBONE", distance 115, metric 140, type level-2
  Installed Mar 29 22:58:29.392 for 00:11:20
  Routing Descriptor Blocks
    10.100.100.2, from 10.100.100.7, via tunnel-te502
      Route metric is 140
    10.100.100.3, from 10.100.100.7, via tunnel-te501
      Route metric is 140
  No advertising protos.
RP/0/RSP0/CPU0:9K6-413#

In accordance to RIB output I was hopping that traffic to 10.100.100.7 be
balanced between both tunnels... however I only see traffic over the first
tunnel...


RP/0/RSP0/CPU0:9K6-413#show mpls forwarding prefix 10.100.100.7/32 detail
Thu Mar 29 23:05:13.320 UTC
Local  Outgoing    Prefix             Outgoing     Next Hop
Bytes
Label  Label       or ID              Interface
Switched
------ ----------- ------------------ ------------ ---------------
------------
16012  16014       10.100.100.7/32    tt502        10.100.100.2
24438881830
     Updated Mar 29 22:58:29.416
     MAC/Encaps: 14/18, MTU: 9180
     Label Stack (Top -> Bottom): { Imp-Null 16014 }
     Packets Switched: 100987115

       16018       10.100.100.7/32    tt501        10.100.100.3
0
     Updated Mar 29 22:58:29.416
     MAC/Encaps: 14/22, MTU: 9180
     Label Stack (Top -> Bottom): { 16020 Imp-Null 16018 }
     Packets Switched: 0


What's happening? why not load balancing ? do i need a additional conf on
ASR9K in order to accomplish MPLS TE load balancing?


Thank you for your answer...

Rgds.


-- 
Omar E.P.T
-----------------
Certified Networking Professionals make better Connections!


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