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Cisco Bug: CSCvt72197 - COS AP reloads after 4h if ICMP is blocked between AP and Default Gateway

Last Modified

Oct 13, 2020

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases

8.10(112.0) 8.10(121.0)

Description (partial)

Symptom:
As from 8.10.112.0, a new gateway reacheability check was introduced and AP reloads after 4h if ICMP is blocked between AP and Default Gateway.
Now the APs will send periodic ICMP echo requests (ping) to the default gateway to check for connectivity.
If you have traffic filtering between APs and default gateway(like ACLs) you will need to allow ICMP between AP and default gateway.

Customers that have ACLs not allowing ICMP will end up facing APs dropping from WLC even if there is perfect connectivity between AP and WLC.

Conditions:
WLC 8.10.x.
ACL between AP and default gateway blocking ICMP.
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