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Cisco Bug: CSCuj64806 - VRRPv2 priority goes wrong with tracking interfaces

Last Modified

Apr 17, 2019

Products (74)

  • Cisco IOS
  • Cisco 819 Hardened Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 886VAG 3G Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco VG204XM Analog Voice Gateway
  • Cisco 881SRSTW Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
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Known Affected Releases

15.2(1)E 15.3(3)M

Description (partial)

Symptom:
VRRPv2 priority may be incorrectly calculated when tracking interfaces.
After reloading the router, the track decrement value is decremented twice.
As a result, VRRPv2 with tracking does not work as expected.

Another symptom is that when a tracked interface returns to an operational state, the original priority is not restored.

Conditions:
This  is observed when you use tracking interfaces for VRRP priority.

Related Community Discussions

VRRP+Track で切り戻りが正常に動作しない
2014年1月6日(初版)   TAC SR Collection 主な問題 Track 機能を VRRP と組み合わせた場合に、VRRP の切り替わりが正常に行われないことが報告されております。   サンプル設定: | track 1 interface Tunnel0 line-protocol ! interface Ethernet0/0 | ip address 192.168.1.1 255.255.255.0 vrrp 1 ip 192.168.1.200 vrrp 1 priority 110 vrrp 1 track 1 !   track が down | するタイミングで誤って decrement を2回実施していたことが原因で、up したタイミングで increment(1回) しても切り戻りが発生いたしません。 原因 この問題は <key>CSCuj64806</key> として報告されています。 IOSの不具合となるため、機種に依存した問題ではございません。 解決策 不具合の暫定回避策: VRRPv2 の代わりに VRRPv3 を使用することで回避が可能です。恒久的な対策としてIOSアップグレードのみとなります。 ...
Latest activity: Feb 11, 2014
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