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Cisco Bug: CSCuj41701 - Large INVITE from Lync 2013 conference causes 4500 CPU load to be very h

Last Modified

Jul 21, 2014

Products (15)

  • Cisco TelePresence MCU 4500 Series
  • Cisco TelePresence MCU 4520
  • Cisco TelePresence MCU 4505
  • Cisco TelePresence MCU 5320
  • Cisco TelePresence MCU 4510
  • Cisco TelePresence MCU 4205
  • Cisco TelePresence MCU 4215
  • Cisco TelePresence MCU 4220
  • Cisco TelePresence MCU MSE 8420
  • Cisco TelePresence MCU 4203
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Known Affected Releases


Description (partial)


When a 4500 series MCU is called from a conference on a Lync 2013 server and the routes are set up incorrectly so that the SIP INVITE is not modified by the VCS, the CPU load becomes very high and is only brought back to normal levels by a restart.


- Lync version 2013 (not supported)
- Calling from a Lync conference (not supported)
- Route from Lync  not set up correctly so the INVITE is not modified by the VCS.
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