DHCP request failed

[Theoneandonly]

Hi all,

I moved recently some part of our WAN from hubs to catalyst 2950. Now DHCP clients are unable to renew their DHCP lease at startup. I've red somewhere that it might be due to spanning three algorithm, causing the process to time-out.
I don't have access to these switches, neither with console, nor remotely.

Any advice ?

By the way, can anyone tell me where I can find a good tutorial about using telnet for 2950 ?

Thanks for any info

 

[thethmon]

If these clients can successfully renew a lease after about 5 minutes, then I would suspect spanning-tree as the culprit. If this is the case, then you will need to get into the switches and disable spanning-tree. This should not cause problems as long as you do not have any redundant links in the network. That is to say, as long as these switches are only connecting to single-connected hosts.

You might also want to ask this question in the Cisco Switches forum. Todd Hethmon
thethmon@hethmon.com

 

[webnetwiz]

All ports on 2950 which connect hosts (PCs, printers), etc), you should configure with "spanning-tree portfast" command. That should take care of the problem (that is if spanning tree is causing it)