Router and Switch issue 1

[oliver1349]

Hi, here is my problem:

My Network cables are connected to a 8 port switch.
One of those ports is connected to a linksys routeur which is acting as DHCP server and of course internet gateway.

Connections are ok till the connected computers are shut down. When computers are started again, they are unable to get a valid IP address (limited 169.xxx address) till I reboot the router.

Would someone have any tip regarding that problem?

Thanks,

Olivier

 

[chieftan]

Have you tried to do a release/renew to see if that is affected as well.

Start / Run / cmd

at dos prompt type the following:-

ipconfig /release
ipconfig /renew

 

[elmurado]

Check the firmware of your router-might need upgrading.
Do you have to have dhcp? Not sure how many IP's you have but maybe changing to static would be easier than renewing all the time.

 

[oliver1349]

Yes with no luck.
My situation now is that I tried to connect the computers directly to the router. Was better but not perfect.
I tried with another router (linksys) and the situation is with a direct connection. Will perform tests with a switch later this week-end

 

[chieftan]

On the DHCP side of things, what is the Lease time (ie - 2 Hours, 1 day, 1 week).

Normally, the MAC address of the system is tied to that IP address for the durartion of the lease time. If the system is switched off but then switched back on within that lease time it generally keeps the same address.

If however, the system is switched back on after the lease time has expired then a new DHCP DISC is sent out. This is a broadcast packet and all DHCP's on that segment will respond. The system then picks the first address received and talks to the supplying DHCP only.

Have you run an Ethereal trace on the far side of the switch to ensure that the DHCP DISC or ACKs are getting through?

 

[oliver1349]

DHCP is needed because the whole installation goal is to provide the network everywhere in my house (plugs in each room) for video, music and, of course the internet.
Some devices just can't get static IPs.

Ethereal is something I did not try yet, lack of spare time.
Will monitor this week-end. Thanks for the information.