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Cisco Bug: CSCul65858 - GARP is sent from a non-Active HSRP router for a NAT ip-address

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

15.2(4)S3 15.3(3)S1

Description (partial)

GARP for the NAT-inside-global-address is sent from a non-Active HSRP router.
The problem is seen when one of the redundancy pair is reloaded and the interface comes up.
Because of the behavior, traffic loss is seen on the NAT traffic.

When receiving the GARP, active router shows the duplicate address message like below.

%IP-4-DUPADDR: Duplicate address x.x.x.x on GigabitEthernetx/x/x, sourced by xxxx.xxxx.xxxx

The problem is seen on ASR1K platforms
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