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Cisco Bug: CSCum05146 - NAT SIP ALG removes certain media attributes

Last Modified

Dec 21, 2019

Products (1)

  • Cisco IOS

Known Affected Releases

15.2(4)M4.3

Description (partial)

Symptom:
The SDP attribute - fmtp  is removed after NAT is applied which may cause certain communications to break

Conditions:
Issue is seen during a SIP INVITE message after being NATed
Issue is currently seen on a 2900 running 15.2(4)M4
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