Well I think your on the right track with the packet capture then. It looks as if the client either never sees the dhcp proposal, or the proposal itself is unacceptable to the client. (there are more potential issues, but only when there is more than 1 dhcp server)
so for the access list: access-list 100 permit udp any any eq bootps access-list 100 permit udp any any eq bootpc as a good comparison, you can use working dhcp packet captures on the net (search for wireshark sample captures). cheers On 21 September 2010 16:58, Jeff Wojciechowski <[email protected]> wrote: > Nope - got a cat3560 doing nothing at all really - just one vlan - no qos - > nothing crazy at all. > > Clients aren't locked down either (even had the terminals set to factory > defaults with DHCP) > > And from the switch side - no errors or flaps. And the trouble is the > clients in question don't ever fully complete the DHCP transaction upon power > up to assign an ip - so they can't connect -but if I assign an IP manually on > the client - then they can connect right up to Citrix servers. > > That's why I figured get a packet capture to look at. > > Thanks, > > -Jeff > > > -----Original Message----- > From: Heath Jones [mailto:[email protected]] > Sent: Tuesday, September 21, 2010 10:52 AM > To: Jeff Wojciechowski > Cc: [email protected] > Subject: Re: [c-nsp] Embeded Packet Capture for DHCP Troubleshooting > > Is the switch in the middle doing anything 'funky', or just pretty bog > standard? > Are the clients configured to accept any dhcp response, or are they locked > down in any way? > > If the ethernet port is flapping according to the client, it may make new > requests when the link comes back up each time.. > If a client sees a gratuitous arp or packet from another host with the same > IP address, it may drop the lease and request a new one.. > > It sounds like it works though, they get the IP, but just keep asking when > they don't need to (before dhcp lease expiry) ?? > > > > This electronic mail (including any attachments) may contain information that > is privileged, confidential, or otherwise protected from disclosure to anyone > other than its intended recipient(s). Any dissemination or use of this > electronic mail or its contents (including any attachments) by persons other > than the intended recipient(s) is strictly prohibited. If you have received > this message in error, please delete the original message in its entirety > (including any attachments) and notify us immediately by reply email so that > we may correct our internal records. Midland Paper Company accepts no > responsibility for any loss or damage from use of this electronic mail, > including any damage resulting from a computer virus. > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
