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Cisco Bug: CSCvu17191 - [IVT-UPF]: First time LI Interception of content packets are successful only after a reload of UPF

Last Modified

Aug 31, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.15.35 21.15.35.75609

Description (partial)

First Time LI Interception of content packets are successful only after a reload of UPF

Symptom:
After configuring LI for the first time on the UPF, interception of packets is not happening:
[local]ivt-testbed-upf-1# show lawful-intercept full all
  Username     :    -                       
  ip-address   :    12.0.0.31       
  msid/imsi    :    123456789012345 
  msisdn       :    9999988888      
  imei/mei     :    12345678666666   
  session      :    Session Present 
  service-type :    user plane
  pdhir        :    - 
  li-context   :    LI              
  intercept-id :    1        
  intercept-key:    - 
 Content-delivery: udp-unack-format-1
       Num. Intercepted pkt for Active call: 0       
  Provisioning method: Camp-on trigger
  LI-index    :    1       


 Total active lawfully intercepted calls 1
 Total camp-on triggers 0

Conditions:
After configuring LI for the first time on the UPF, interception of packets is not happening. however LI Recovery Stats is incremented.

[local]ivt-testbed-upf-1# show lawful-intercept statistics 
 Total currently active LI calls:               0
 Total current camp-on triggers:                0
 Total event packets sent:                      0
 Total intercepted content packet sent:         0
 Total event packets dropped:
         no tcp connection with mediation       0
         src-ip-addr not configured             0
 Total content packets dropped:
         no tcp connection with mediation       0
         src-ip-addr not configured             0
         LI-context mis-configured              0
 Total intercepted packets for active calls:
         number of event packets:               0
         number of content packets:             0
 Total LI provisioning stats:
         via active-only method                 0
         via camp-on method                     0
 Total LI provisioning failure stats:
         LI-context not configured              0
         src-ip-addr not configured             0
         src-ip-addr mis-configured             0
 Total LI session termination stats:
         due to call-disconnect                 0
         due to deletion of context             0
         due to de-provisioning                 0
 Total LI sess recovery stats:
         recovery performed                     0
         recovery info collected            3
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