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Cisco Bug: CSCvv32514 - 9800 sending radius packets with df-bit set and not honoring PMTU

Last Modified

Sep 15, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.12.2 16.12.3

Description (partial)

Symptom:
9800 sending radius packets over ipsec tunnel with df-bit set which prevents fragmentation and causes packet drops at the edge router. The controller is receiving fragmentation needed packets

Conditions:
9800 with default settings authenticating clients with radius server authenticating using EAP over ipsec tunnel that has specified MTU and fragmentation occurring on any packets above the MTU
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