Symptom

Input queue of dialer interface is wedged by following procedure. 1) Establish IPsec tunnel on PPPoE session. 2) Shut the physical PPPoE Interface 3) Clear IPsec session (clear crypt session) 4) No shut phsical PPPoE Interface 5) Ping through IPsec tunnel while PPPoE session and IPsec session is establishing again. 6) input queue of Dialer Interface is wedged like below: Router #show int dialer 1 | i Input queue|Dialer1 Dialer1 is up, line protocol is up (spoofing) Input queue: 20/75/0/0 (size/max/drops/flushes); Total output drops: 0 <<<< 7) At last input queue is completely wedged and drop counter is increased like below: Router #show int dialer 1 | i Input queue|Dialer1 Dialer1 is up, line protocol is up (spoofing) Input queue: 76/75/89/0 (size/max/drops/flushes); Total output drops: 0 <<<<<

Conditions

Problem is happened with ISM-VPN-29 and is not happened with Onboard-VPN.

Workaround

Disable ISM-VPN-29 and use Onboard-VPN.

Further Problem Description