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From: Reza Sharifi
To:
Sent: Thursday, May 23, 2002 5:30 PM
Subject: Re: Token ring Question. [7:44805]
Ivan,
Take a look at the subject (CCIE written question)
that Dennis responded to on May 20.
He is a great source for this group.
Thanks
Reza
Ivan wrote in message
[EMAIL
you can do transparent bridging between Token Ring and Ethernet. It
requires a Translational Bridging..
See the following URL: (watch for wrap)
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/mmbridge.htm
Mike W.
2504s wrote in message
[EMAIL PROTECTED]">news:[EMAIL
Hi Ivan,
Mac addresses only have local significance. So for your scenario, host X
sends a packet with it's own MAC address as the source and the router TR
interface as the destination MAC address. The router then rebuilds the
packet and sends it out the ethernet interface with the Ethernet
This is achieved by bit swapping. I do not know the complete ins and outs of
it but I has attached a URL which is a bit swapping tool which can be used
to verify translation.
http://www.cisco.com/cgi-bin/Support/Bitswap/bitswap.pl
Message Posted at:
He said the router is acting as a translation (sic) bridge. So the router
(bridge) address does not come into play. The router (bridge) translates
the non-canonical TR address to a canonical Ethernet address. The bridge
reverses the bits in each byte of the address.
We have had many
At 07:25 AM 5/23/02, Ivan wrote:
Hi all,
I have a interest question, doesn't any one know the answer?
A router is being used as a translation bridge between a Token Ring network
and an Ethernet network. Host X on the Token ring sends a packet to Host Y
on the Ethernet. The soursce MAC address
I just noticed that I misplaced the functional/non-functional bit. I hate
that! ;-)
The functional/non-functional bit is the most significant bit of the 3rd
byte (not the least significant bit of the 2nd byte as I said before.)
So, the address is:
4000.a089.0002
0100 1010
This is correct if the router is acting as a router but when the router
is bridging, this is no longer true.
To answer your question, Ivan, you would simply perform bitswapping on the
TR MAC to find the ethernet equivalent.
There were a series of posts on this topic (some by me) that
Priscilla Oppenheimer wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
If this seems mysterious or difficult to apply in a generic fashion to any
hex representation of a byte, then it's not time yet to go for CCIE.
Thank you for verifying my feelings about this. As you may, or
Ivan,
Take a look at the subject (CCIE written question)
that Dennis responded to on May 20.
He is a great source for this group.
Thanks
Reza
Ivan wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
Hi all,
I have a interest question, doesn't any one know the answer?
A
I'm with you 100% on this. I said that bit swapping is as easy as writing
your name backwards. Maybe that's a bit of an exaggeration, so to speak,
because you do have to do hex to binary and back, but only for a four-digit
binary number. So it's as easy as writing your name backwards in Pig
]
cc:
Subject:Re: Token ring Question. [7:44805]
Is this part of a business decision process?:
At 07:25 AM 5/23/02, Ivan wrote:
Hi all,
I have a interest question, doesn't any one know the answer?
A router is being used as a translation bridge between a Token Ring
network
ring Question. [7:44805]
Is this part of a business decision process?:
At 07:25 AM 5/23/02, Ivan wrote:
Hi all,
I have a interest question, doesn't any one know the answer?
A router is being used as a translation bridge between a Token Ring
network
and an Ethernet network. Host X
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