WAN ip Renews without warning

[cdikland]

For the past 2 months or so we have been experiencing some odd behaviour with our internet connection. We will suddenly lose our internet but only for 1 minute or less. When the connection is restored, we have a brand new IP. I am assuming this problem lies with my ISP but I would like to get others opinion under what circumstances could this IP be renewed so quickly???

My main router is AC68U running Merlins FW 378.56_2

 

[RMerlin]

What does the system log show?

 

[cdikland]

What does the system log show?

Not an awful lot. Here is portion of the log at the time this occurred

Mar 2 19:56:29 kernel: device br0 left promiscuous mode
Mar 2 20:44:44 WAN Connection: Ethernet link up.
Mar 2 20:44:44 rc_service: wanduck 405:notify_rc restart_wan_if 0
Mar 2 20:44:44 dnsmasq[419]: read /etc/hosts - 5 addresses
Mar 2 20:44:44 dnsmasq[419]: read /etc/hosts.dnsmasq - 1 addresses
Mar 2 20:44:44 dnsmasq[419]: read /etc/hosts.dnsmasq - 1 addresses
Mar 2 20:44:44 dnsmasq-dhcp[419]: read /etc/ethers - 52 addresses
Mar 2 20:44:44 dnsmasq[419]: using nameserver 216.104.98.222#53 for domain eastlink.ca
Mar 2 20:44:44 dnsmasq[419]: using nameserver 216.104.96.22#53 for domain eastlink.ca
Mar 2 20:44:44 dnsmasq[419]: using nameserver 209.107.219.5#53 for domain netflix.net
Mar 2 20:44:44 dnsmasq[419]: using nameserver 64.145.73.5#53 for domain netflix.net
Mar 2 20:44:44 dnsmasq[419]: using nameserver 209.107.219.5#53 for domain netflix.com
Mar 2 20:44:44 dnsmasq[419]: using nameserver 64.145.73.5#53 for domain netflix.com

 

[pete y testing]

I am assuming this problem lies with my ISP but I would like to get others opinion under what circumstances could this IP be renewed so quickly???

the isp is running a very short dhcp lease time and thus when you reconnect you get a different ip address , does it happen around the same time every day ? could be an over sold subscription base by a cheap isp

 

[cdikland]

the isp is running a very short dhcp lease time

Ah... But here's the thing. I have at times shutoff my router for what ever reason and after 5+minutes rebooted but still retained my original IP. There is no specific times when this occurs but everyone/thing connected is blown off the network for a short period of time. The new IP is obvious because netflix no longer works until I reset my account/IP information at Unblock-US

 

[RMerlin]

Not an awful lot. Here is portion of the log at the time this occurred

Mar 2 19:56:29 kernel: device br0 left promiscuous mode
Mar 2 20:44:44 WAN Connection: Ethernet link up.
Mar 2 20:44:44 rc_service: wanduck 405:notify_rc restart_wan_if 0
Mar 2 20:44:44 dnsmasq[419]: read /etc/hosts - 5 addresses
Mar 2 20:44:44 dnsmasq[419]: read /etc/hosts.dnsmasq - 1 addresses
Mar 2 20:44:44 dnsmasq[419]: read /etc/hosts.dnsmasq - 1 addresses
Mar 2 20:44:44 dnsmasq-dhcp[419]: read /etc/ethers - 52 addresses
Mar 2 20:44:44 dnsmasq[419]: using nameserver 216.104.98.222#53 for domain eastlink.ca
Mar 2 20:44:44 dnsmasq[419]: using nameserver 216.104.96.22#53 for domain eastlink.ca
Mar 2 20:44:44 dnsmasq[419]: using nameserver 209.107.219.5#53 for domain netflix.net
Mar 2 20:44:44 dnsmasq[419]: using nameserver 64.145.73.5#53 for domain netflix.net
Mar 2 20:44:44 dnsmasq[419]: using nameserver 209.107.219.5#53 for domain netflix.com
Mar 2 20:44:44 dnsmasq[419]: using nameserver 64.145.73.5#53 for domain netflix.com

If you have a matching "Ethernet link down" then it means that your modem just rebooted itself. Look for a problem with either the modem or the ISP.

 

[cdikland]

Look for a problem with either the modem or the ISP.

That is what I figured but I wanted a second opinion My money is on the old modem which looks like something that went through the war. Anyway, thanks for your reply.

 

[cdikland]

If you have a matching "Ethernet link down" then it means that your modem just rebooted itself. Look for a problem with either the modem or the ISP.

So, I have been watching my router for a few weeks now and when the problem occurs my log shows only "Ethernet link up". Each time this happens there is no matching "Ethernet link down" log entry. Am I to assume now that the problem lies with the router not the modem as I originally thought??

 

[RMerlin]

link up messages would also indicate an Ethernet-related issue, which usually points at the modem.