DHCP relay not working in switch WS-C3560G-24PS
image details -
its working if i keep DHCP server in same vlan as user ., wireshark says DHCP offer packets are currupted and there is no client ip (0.0.0.0 0.0.0.0 ) .
Thanks 4 reply
Could you post the wireshark capture file filtering only DHCP.
Provide sh run | s dhcp.
Also do a debug ip dhcp server events and debug ip dhcp server packets on the switch doing relay.
I was talking about the modified pcap showing only dhcp not a screenshot.
Can you also picture your topology with HSRP, DHCP server, DHCP pools and provide output of sh run | be dhcp on the switch.
Where was the capture taken? where is located DHCP server, is it router, w2k3,linux?
Hi Alain ,
This is windows server , switch 3560 acting as relay .Before switch was working as IOS DHCP and now I want it to configure as relay agent only .
In same vlan its working fine but on diff vlans its not .
I m not able to attach wireshark capture here , not able to find option what most i can say DHCP offer packet is currupt with 0.0.0.0 in client address .
please let me know if any thing you can suggest me .
Thanks 4 reply
provide a picture of topology and post running of the 3560 .
Just use the attached file at the bottom of window to attach pcap file.
foget to add - full config I m not able to past here but here is the vlan for which i did wireshark capture -
description <<< A_Corp >>>
ip vrf forwarding A_VRF
ip address 10.107.170.2 255.255.255.192
ip access-group A_Corp in
ip helper-address 10.107.170.228
no ip redirects
no ip unreachables
no ip proxy-arp
standby 100 ip 10.107.170.1
standby 100 timers 5 10
standby 100 preempt
standby 100 authentication md5 key-string 7 052D423960666E3039
I've never configured DHCP relay agent with vrf so I'll lab it up to see if this is the vrf which may be causing the problem.