From: Ben_J_Durand@xxxxxxxxxx
Date: Sun Mar 26 2000 - 19:15:04 GMT-3
Hi Art,
I'm confused about this:
-> 12.0 Doc > Bridge and IBM > IBM Networking > DLSW
-> (Optional) MAC address mask in hexadecimal h.h.h. The "f" value represents
-> the "don't care" bit and the "0" value represents the "care" bit.
-> The mask indicates which bits in the MAC address are relevant.
->
-> dlsw icanreach mac-address 0005.e9db.1100.0000 mask 0000.0000.ffff
I wrestled with that to figure out which way the mask goes, and this is the
output straight from the router:
Dublin(config)#dlsw icanreach mac-address 4000.bbbb.0000 ?
mask Set a MAC Mask - MACx is reachable if (MACx & MASK) == MACVALUE
<cr>
The way this is worded in IOS, if I had a MACx of 4000.bbbb.1234, then
(4000.bbbb.1234 & ffff.ffff.0000) == 4000.bbbb.0000 which makes sense to me. I
f
it was 0000.0000.ffff then it doesn't work.
I agree with you, that's how the docs are worded, but IOS seems to point the
other way. I've tried both commands, and dlsw doesn't really care one way or
the other. It shows up in "show dlsw capabilities" as "0000.0000.ffff" or
"ffff.ffff.0000" depending on how you entered it.
Any concensus out there? Has anyone actually tried and verified this?
I'm confused :) Thank you.
- Ben
"Mosley, Arthur" <Arthur.Mosley@wang.com> on 03/26/2000 04:41:47 PM
Please respond to "Mosley, Arthur" <Arthur.Mosley@wang.com>
To: "'clou@ebnetworks.com'" <clou@ebnetworks.com>, ccielab@groupstudy.com
cc: (bcc: Ben J Durand/Tivoli Systems)
Subject: RE: DLSW - DLSW mac-address command
Thank you for your quick response.
ICANREACH understood. I was more interested in how the dlsw mac-addr
command works(does not support wild cards). Additionally, the fff are
don't care bits and 0 are care bits according to the cisco 12.0 doc(it is
not described in the earlier ones. The Configuring Cisco Routers for DLSW
and Desktop protocol example is inconsistent with the Cisco docs.
Thanks again!
art
12.0 Doc > Bridge and IBM > IBM Networking > DLSW
mask mask
(Optional) MAC address mask in hexadecimal h.h.h. The "f" value represents
the "don't care" bit and the "0" value represents the "care" bit.
The mask indicates which bits in the MAC address are relevant.
dlsw icanreach mac-address 0005.e9db.1100.0000 mask 0000.0000.ffff
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