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Cisco Bug: CSCsz33693 - Sending ICMP dest unreach from inappropriate interface

Last Modified

Jan 28, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

When a MTU execeeded packet with DF-bit set arrives at the router,
router should send back ICMP destination unreachable from the interface
where it received the packet.
But the problem is that the router doesn't send ICMP unreachable
if received interface is VRF interface.

this problem is observed with L2TP.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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