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Cisco Bug: CSCut60261 - Fragmented UDP SIP messages via CUBE not processed

Last Modified

Feb 16, 2018

Products (87)

  • Cisco IOS
  • Cisco 886VAG 3G Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 819 Hardened Integrated Services Router
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Known Affected Releases

15.2(4)M6

Description (partial)

Symptom:
If SIP message in UDP transportation is fragmented, fragmentation received by IOS gateway are not observed in debugs.

a large UDP SIP invite  may be fragmented into two packets to fit into Ethernet frame, since the IOS is not re-assembling the fragmentation properly, CUBE appears not receiving the SIP invite message,

Conditions:
++ Observed for all fragmented SIP UDP packet processing in 15.2(4)M6
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