In reply to a post by mistral:

I seem to keep coming across a problem with a cisco router not being able to allocate an ip address by dhcp on a virgin connection. It happens every time the connection drops and has been doing this since the router was installed. But I don't think its our problem since it works again after we get virgin to reset something.

Full details of this are available here

What do you think?

Incidentally I forgot to mention that VM use Cisco's own DHCP daemon as part of Cisco Network Registrar.

So if it's poor DHCP it's by the same company that made your router.

Again I've never seen issues but I've never felt the need to use an IOS based router at home so no idea!

Why doesn't that surprise me...

ok if I understand you right.

lets say I have a pc connected direct to modem.

I then swap it with a laptop, you saying dhcp renew on the laptop wouldnt work and I would need to reboot the modem?

In reply to a post by Chrysalis:

ok if I understand you right.

lets say I have a pc connected direct to modem.

I then swap it with a laptop, you saying dhcp renew on the laptop wouldnt work and I would need to reboot the modem?

Yes, the modems will only accept the first MAC address connected to them per their config file. Once they have learned a MAC they will not learn another regardless of what you do.

The setting is a per-session setting. Nothing short of restarting the modem's cable interface will start a new session.

Edited by deleted (Mon 27-Jun-11 20:55:43)