Symptom

First observed in IOS XR 6.6.3 in ASR9k BNG IPOE DHCP ipv4 base profile. Process dhcpd's current packet allocation count is reaching maximum and thus not able to accommodate new incoming packets. Thus new subscribers are unable to connect and existing client session leases are not getting renewed and session is getting deleted after lease expiry.

Conditions

In case of BASE profile mode if dhcpd does not receives session start response from iedge, dhcpd will delete the client binding and fails to release the packet. Thus causing memory leak in the dhcpd packet queue.

Workaround

Restart the dhcpd process

Further Problem Description