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Cisco Bug: CSCul35051 - ISAKMP NAT-keepalives not sent if both ends are beind NAT

Last Modified

Feb 13, 2018

Products (49)

  • Cisco IOS
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
  • Cisco 881W Integrated Services Router
  • Cisco 888E-CUBE Integrated Services Router
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Known Affected Releases

15.1(4)M 15.1(4)M4

Description (partial)

Symptom:
IOS routers behind a NAT/PAT are not sending nat-t keepalives packets whenever the remote end is as well behind a NAT.

Conditions:
Have a VPN connection between a router and a headed with both being behind NAT.
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Bug Details Include

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  • Status
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  • Known Fixed Releases
  • Related Community Discussions
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