It sounds to me like you still have a layer three address somehwere on one
of your routers, and that you maight still have a default gateway on one of
your PCs pointing to that adx.
I would pose the question, are both PC's configured to be on the same
network? DO they have the same mask?
If either of them have a default gateway configured I would turn that off
for the testing just to limit the number of variables.
If the routers arte configured to be bridges they should be totally
transparent. You should not be able to ARP them because ARP requires a
destination IP address, and if they are just bridges they won't have any IP
addresses
my $.02
At 03:22 PM 06/04/2001 -0400, Philip Barker wrote:
>Hi Group,
> I vill say ziss only vonce.
>
>Okay, its my second attempt at trying to work out how I can bridge IP across
>to 2500's.
>
>I have 2 2500's configured with "no ip routing". 2 PC's are connected at
>either end, i.e one to bridge 1
>and one to bridge 2. I have a sniffer on both PC's. I am attempting to ping
>from one PC to the other.
>IEEE spanning tree is applied on both bridges. The bridges are connected via
>a
>serial cable and the serial
>ports of the bridges as well as the Ethernet ports are in bridge group 1.
>
>I have verified spanning tree operation and one of the serial ports has been
>elected root port on bridge 1,
>the other bridge is the designated bridge. Ref : Radia Perlman,
>Interconnections p.83.
>So far so good.
>
>I have configured the PC's with a default gateway to the IP address of each
>of
>the bridges.
>When I attempt to ping from one PC to the other, I can see from my Sniffer
>trace that the PC ARP's for
>the MAC Address of the bridge, this ARP is successful and the PC then sends
>out an ICMP echo request.
>This echo request appears to be my problem since the destination MAC address
>of this packet contains
>the Ethernet Mac address of the local bridge and the local bridge
>consequently
>disregards the packet.
>Should the PC have an ARP entry installed for the destination IP address
that
>I am pinging ?
>
>Has anyone achieved this scenario ? or am I way off mark with my thinking
>here.
>
>The reason I set this LAB up was because so many questions appear to be
being
>asked at CCIE written level
>akin to this setup i.e can PC 1 ping PC 2 in similar arrangement using
>(RSRB/DLSW+/SRB etc)
>
>Any comments welcome.
>
>Regards,
>
>Phil.
Tom Pruneau
Trainer Network Operations
GENUITY
3 Van de Graff Drive Burlington Ma. 01803
24 Hr. Network Operations Center 800-436-8489
If you need to get a hold of me my hours are 8AM-4PM ET Mon-Fri
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