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Cisco Bug: CSCtd72215 - IPv6: diesabling & then enabling "ipv6 unreachables" does not work

Last Modified

Apr 13, 2010

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

Using 12.2(33)XNE CCO image the following behavior is noticed with an IPv6 enabled   \
interface. Basically, toggling "ipv6 unreachables" config on an interface leads to   \
unreachables being permanently disabled:

1. Confirm that by default interface responds with ICMPv6 unreachable message when   \
traffic with unknown destination is sent

2. Configure "no ipv6 unreachables" on interface and it is observed that ICMPv6      \
unreachables are no longer sent

3. Configure "ipv6 unreachables" on interface ... expect to see unreachables being   \
generated again however this is not the case
after configure no ipv6 unreachables, can not configure back to ipv6 unreachables
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Bug Details Include

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