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Cisco Bug: CSCvu39206 - Cisco 9130 AP: MTU mismatch between NSS and CAPWAP

Last Modified

Sep 19, 2020

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases

ap-17.2.1.11

Description (partial)

Symptom:
AP9130 is dropping fragments uplink/downlink when nss MTU is different that capwap MTU.
sh cont nss status | i mtu
sh capwap client rcb | i MTU

sh cont nss stats showing:
drop_memfail counters increasing for upstream drops
drop_malformed counters increasing for downstream drops

Conditions:
Observed when there is capwap fragmentation due to capwap MTU lower than 1485.
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