Ping and Trace problem

gurkamal01 · ‎02-24-2010

Hi,

Vlan 70 and vlan 83 exist on 6513 floor switch 1 . This floor switch is tied to core switch 2. I have attached a Diagram of the scenario.

SVI for vlan 70 and 83 sit on Core 1.

My workstation is on vlan 70 and when i do a ping to a workstaion on vlan 83 it works but when i do a trace to the same desktop on vlan 83 it stops on Core 1 and i dont see the trace going to hte workstation

Can anybody explain why this is hapenning.

Thanks

Edison Ortiz · ‎02-24-2010

Do you have no ip unreachables enabled on any of the SVIs?

gurkamal01 · ‎02-25-2010

Hi Ediison,

"No IP unreachables " is not enabled on any of the SVI's

Thanks

milan.kulik · ‎02-25-2010

Hi,

any personal Fw involved on the PCs?

BR,

Milan

gurkamal01 · ‎02-25-2010

Hi

I can ping the Workstation but trace doesn't work

i have question aren't ping and trace both the same (ICMP)

KARUPPUCHAMY MALAIYANDI · ‎02-25-2010

Hi,

ping is working with ICMP and trace is working with UDP packets.

can you check is there any desktop firewall in your both workstations.

regards

karuppu

milan.kulik · ‎02-25-2010

Hi,

Cisco trace is using UDP but Microsoft tracert is using ICMP.

The difference between Ping and traceroute then is the traceroute works with TTL - it sends packets with TTL=1, 2, 3,...

And the routers on the path are replying with ICMP "TTL expired" responses.

The target device should respond with a different ICMP message (Host unreachable, I think) though.

BR,

Milan

gurkamal01 · ‎02-25-2010

Hi,

you mean if i can ping the workstation the firewall is stopping trace packets (UDP)

Is this possible?