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Subjectip/arp problems in switched environment (kernel 2.0.36)
Hi,

I have a problem with ethernet/token ring address resolution
in a switched ethernet/token ring environment.
I can´t communicate (via IP) from a linux-machine (kernel 2.0.36) on the

ethernet to a machine wich is placed in token ring behind the switch(i.
e. win
nt or AIX). When the Linux-box is placed in the token ring all
communication
works fine.

I did some tests:

the ping (ping aix001) results in nothing (no response)
the arp cache shows up the following:

aix001.lrp.de (10.1.200.3) at <incomplete> on eth0

the original MAC-Adress of the machine is 00:04:ac:fd:cc:58
the switch translates it to 00:20:35:bf:33:1a

So, I created a manual arp cache entry with the translated
MAC-Address:

arp -s aix001 00:20:35:bf:33:1a

After this, all communication works fine.

Then I did some further tests with IPX. Here all things
are working fine.

Any ideas on it? I posted this to the linux networking
news-group some weeks ago, but there was no response.

The switches are from Cabletron Systems (some SmartSwitch 9000
and SmartSwitch 6000). I also did some tests with some older kernel
versions and some development kernels.

Thanks,
- Volker -

--
##############################
sender: Volker Dormeyer
eMail: Volker.Dormeyer@lrp.de
volker@csa.de


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