DHCP Relay V DHCP Local Cisco v 3com

Posted by DefSol on Server Fault See other posts from Server Fault or by DefSol
Published on 2010-03-26T02:25:05Z Indexed on 2010/03/26 9:13 UTC
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I have a client who has a WAN with 7 sites. At one site in particular, randomly about 4-5 clients do not get an IP address. The local gateway is a cisco 871 and relay's to a windows server in a Data Center running a valid scope for the subnet.

If I put in a cisco 1800 and configure a dhcp scope (disabling the scope on the server) all clients get an ip address and everything is right with the world.

The Wan providing keeps saying it's a local issue although we can work around with the 1800. The provider says a 3Com switch is at fault and the 1800 does not have a local switch, and because the 871 does, means the internal switching will receive a different uplink policy. The 3Com is the only managed switch in the subnet.

Any ideas greatly appreciated.


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