--- "Deloso, Elmer G (WPNSTA Yorktown)" <[EMAIL PROTECTED]> wrote:
> Hi, all.
> I might have posted something similar to this not too long ago but I
> might
> not have beed specific enough. Here's the story:
>
> HostA ---Router1---........................Router9----HostB
>
> If i traceroute from within Router1 to HostB, it goes through.
Which leads me to believe Router 9 is not filtering high UDP packets, ICMP
Time Exceeded, or ICMP Destination Port Unreachable.
> But if i do the same from HostA, it stops at Router9.
Router 9 may be filtering ICMP echo reply packets. (Echo request packets
go through because Host B's traceroute stops at Router 1 not at 9.) A
Windows host uses ICMP Echo (instead of high port UDP) packets when using
"tracert". Everyone else traceroutes normally.
> The same thing happens when tracerouting from HostB's end, it stops
> at Router1.
I wonder if it's the access-lists?
> So i checked with another network that also has a route to Router9,
> ans the same story happens. From the Router-Y the trace gets to
> HostB. But from Host-Y it stops at Router9.
> Has anyone else seen this and figured out the cause?
Check if "ping" from the routers to each of the hosts works.
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