Sorry about this. Seems the interface to this forum takes enter as I'm done instead of new line.
Here's my router info:
Firmware Version: 3.17.0 Build 20150518 Rel.38024n
Hardware Version: ArcherC8 v1
The router is releasing the IP address and then Cox sometimes issues a new one and sometimes not. Here's the router log from a successful DHCP renew. As to why it takes 3 to 5 minutes is anyones guess.
1st day 22:02:17 DHCP INFO DHCPC Unicasting a release of 68.107.4.209 to 172.19.97.117
1st day 22:02:17 DHCP INFO DHCPC Entering released state
1st day 22:02:17 DHCP INFO dhcpc_ipc_data_rcv_router 763 : current network type = 0
1st day 22:03:59 DHCP INFO DHCPC perform a DHCP renew
1st day 22:03:59 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 0
1st day 22:04:01 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 0
1st day 22:04:03 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 0
1st day 22:04:07 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 1
1st day 22:04:09 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 1
1st day 22:04:11 DHCP INFO DHCPC DHCP Service unavailable, recv no OFFER
1st day 22:04:11 DHCP INFO dhcpc_ipc_data_rcv_router 763 : current network type = 0
1st day 22:04:21 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 0
1st day 22:04:23 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 0
1st day 22:04:25 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 0
1st day 22:04:29 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 1
1st day 22:04:31 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 1
1st day 22:04:33 DHCP INFO DHCPC DHCP Service unavailable, recv no OFFER
1st day 22:04:33 DHCP INFO dhcpc_ipc_data_rcv_router 763 : current network type = 0
1st day 22:05:13 DHCP INFO DHCPC Send DISCOVER with request ip D1046B44 and unicast flag 0
1st day 22:05:13 DHCP INFO DHCPC Recv OFFER from server 756113ac with ip d1046b44
1st day 22:05:13 DHCP INFO DHCPC Send REQUEST to server 756113ac with request ip d1046b44
1st day 22:05:14 DHCP INFO DHCPC Recv ACK from server 756113ac with ip d1046b44 lease time 86400
1st day 22:05:14 DHCP INFO DHCPC:GET ip:d1046b44 mask:f8ffff gateway:1006b44 dns1:b1c6944 dns2:b1d6944 static route:0
1st day 22:05:14 DHCP INFO dhcpc_ipc_data_rcv_router 763 : current network type = 0
1st day 22:05:14 DHCP NOTICE Dynamic IP(DHCP Client) obtained an IP successfully
This never happened before the upgraded modem.
Power cycling the modem (and router if needed) forces a clean DHCP request.
I'm getting a lease time of 86400 seconds (24hrs) but my router seems to be releasing randomly.
I have another identical router and I'll swap it in to see if it's my problem.
For now my workaround was to fix the IP address which will work until COX decides I need something different. Not sure how long that will last.