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Cisco Bug: CSCvs78594 - NAT doesn't translate SIP header's orignial source for return traffic on 16.9.3 and 16.9.4

Last Modified

Aug 29, 2020

Products (14)

  • Cisco ASR 1000 Series Aggregation Services Routers
  • Cisco ASR 1000 Series IOS XE SD-WAN
  • Cisco 4221 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco 4321 Integrated Services Router
  • Cisco ASR 1002-X Router
  • Cisco ASR 1001-X Router
  • Cisco 4351 Integrated Services Router
  • Cisco ISR 4000 Series IOS XE SD-WAN
  • Cisco ISR 1000 Series IOS XE SD-WAN
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Known Affected Releases

16.9.3 16.9.4

Description (partial)

- NAT doesn't translate SIP header source from out to in
- From in to out NAT works as expected
- Call establishment breaks because of the NAT

- IOS-XE running 16.9.3 or 16.9.4
- When initiating the call from inside to the outside, the phone behind the outside is ringing. When it answers the connection never establishes successfully
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Related Community Discussions
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