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Cisco Bug: CSCvu17427 - Crash on ASR during collab call load

Last Modified

Sep 25, 2020

Products (68)

  • Cisco IOS
  • Cisco 4221 Integrated Services Router
  • Cisco Catalyst 9400 Supervisor Engine-1XL-Y
  • Cisco Catalyst 9300-48T-A Switch
  • Cisco Catalyst 9300-48P-A Switch
  • Cisco Catalyst C9500-16X-E Switch
  • Cisco Catalyst 9800-40 Wireless Controller
  • Cisco ASR 1000 Series IOS XE SD-WAN
  • Cisco Catalyst 9300-48U-A Switch
  • Cisco Catalyst 9300-48UXM-A Switch
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Known Affected Releases

16.12.2 16.12.3 16.9.5 17.2.1 17.3.1 17.3.2 17.4.1

Description (partial)

Crash observed when load test performed Basic, Transfer, Hold/Resume and Conference scenarios simultaneously over a long period of time (3-12 hours). Issue was not seen when we run each one of these flows individually.

Symptom:
Crash seen under load with combination of IPv4 & IPv6, both Secure & Nonsecure call types. Problem is seen with different Call flows like Basic call, Transfer, Hold/Resume and Conference scenarios, being tried out in parallel on different calls .

Conditions:
Basic, Xfer, Hold/Resume and Conference scenarios combined load test for long-duration (3-12 hours). Not seen when these are scenarios are executed individually.

Test includes:
- SIP endpoints with combination of IPv4 & IPv6, both Secure & Nonsecure types
- SIP trunks between CUCM clusters and ASR GW with combination of IPv4, IPv6 types and Secure and Non-Secure types

This load run was pumping around 30 active calls on the ASR GW when the crash happened.

When a condition arises where we are getting delayed responses from the DP then it's leading to some race condition (where we have received request for stream add but previous response for stream dead is still awaited at the DP for same stream callid) which eventually results in crash.
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