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Cisco Bug: CSCuw33328 - IOS-XE: ZBF + dVTI + Default Zone, IOS doesn't do VFR

Last Modified

Jan 24, 2019

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

VFR is not enabled in default zone with dynamic tunnel and ZBF (e.g. DMVPN).

A symptom of the above is packets that need reassembly due to fragmentation to get dropped with an error similar to the one below:
Dropping udp pkt from internal0/0/rp:0 => 
due to Invalid L4 header with ip ident 11197

SPOKE#show policy-firewall stats platform
--show platform hardware qfp active feature firewall drop--
Drop Reason                                                             Packets
Invalid L4 header                                                          1241	<---

Default zone is enabled
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