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Cisco Bug: CSCut63277 - L2TP Load balancing not working during burst of traffic

Last Modified

Feb 06, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(938)

Description (partial)

Symptom:
[local]chcgila2ha2# show l2tp sessions peer-address 208.83.161.222 | grep Total
Thursday March 26 15:07:09 UTC 2015
Total sessions matching specified criteria: 6108
 
[local]chcgila2ha2# show l2tp sessions peer-address 208.83.161.206 | grep Total
Thursday March 26 15:07:48 UTC 2015
Total sessions matching specified criteria: 2168
 
[local]chcgila2ha2# show l2tp sessions peer-address 209.233.38.21 | grep Total
Thursday March 26 15:08:16 UTC 2015
Total sessions matching specified criteria: 2866
[local]chcgila2ha2#

Conditions:
1. When the load balancing algorithm is configured as 'balanced'

  subscriber name commandcenter.sprintpcs.com
      timeout absolute 88200
      tunnel l2tp peer-address 208.83.161.206 encrypted secret /// preference 10 local-address 68.28.89.76      
      tunnel l2tp peer-address 209.233.38.21 encrypted secret /// preference 10 local-address 68.28.89.76      
      tunnel l2tp peer-address 208.83.161.222 encrypted secret /// preference 10 local-address 68.28.89.76      
      loadbalance-tunnel-peers balanced
    exit
2. burst of traffic
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