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Michelot
Guest
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 Posted:
Wed Dec 15, 2004 8:44 pm Post subject:
What would be a non-transparent bridge? |
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Bonjour,
I wonder what would be a non-transparent bridge. Perhaps a bridge that
tags the received non-tagged frames. Is it an example? have you
others?
Thanks,
Michelot |
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Rich Seifert
Guest
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| Posted:
Wed Dec 15, 2004 9:22 pm Post subject:
Re: What would be a non-transparent bridge? |
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In article <1c1de54c.0412150744.51d933cb@posting.google.com>,
mhostettler@voila.fr (Michelot) wrote:
| Quote: | Bonjour,
I wonder what would be a non-transparent bridge. Perhaps a bridge that
tags the received non-tagged frames. Is it an example? have you
others?
|
A "Non-transparent bridge" generally means a Source Routing Bridge
(SRB), as used with Token Ring networks. These bridges were "visible"
(i.e., not transparent); end stations expressly specified the path each
frame would take via a list of ring numbers and bridge numbers. SRBs are
no longer used today. (There is a complete discussion of Source Routing
Bridges in Chapter 6 of "The Switch Book".)
Trivia: A "transparent" object is one which is physically present, but
can be treated as if it was not (e.g., a transparent bridge). The
opposite is a "virtual" object, which is not physically present, but can
be treated as if it was.
--
Rich Seifert Networks and Communications Consulting
21885 Bear Creek Way
(408) 395-5700 Los Gatos, CA 95033
(408) 228-0803 FAX
Send replies to: usenet at richseifert dot com |
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T. Sean Weintz
Guest
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| Posted:
Wed Dec 15, 2004 9:43 pm Post subject:
Re: What would be a non-transparent bridge? |
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Rich Seifert wrote:
| Quote: | A "Non-transparent bridge" generally means a Source Routing Bridge
(SRB), as used with Token Ring networks. These bridges were "visible"
(i.e., not transparent); end stations expressly specified the path each
frame would take via a list of ring numbers and bridge numbers. SRBs are
no longer used today.
|
Oh yes they ARE still used today. I know several fortune 50 comnaies
that are still heavily using token ring and still use SRB's. Heck, my
local hospital still uses 4mbps token over type1 cable and SRB's. |
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Rich Seifert
Guest
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| Posted:
Wed Dec 15, 2004 11:07 pm Post subject:
Re: What would be a non-transparent bridge? |
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In article <10s0qdloi7amo83@news.supernews.com>,
"T. Sean Weintz" <strap@hanh-ct.org> wrote:
| Quote: | Rich Seifert wrote:
A "Non-transparent bridge" generally means a Source Routing Bridge
(SRB), as used with Token Ring networks. These bridges were "visible"
(i.e., not transparent); end stations expressly specified the path each
frame would take via a list of ring numbers and bridge numbers. SRBs are
no longer used today.
Oh yes they ARE still used today. I know several fortune 50 comnaies
that are still heavily using token ring and still use SRB's. Heck, my
local hospital still uses 4mbps token over type1 cable and SRB's.
|
Sorry, I meant that SRBs are no longer used for new installations. Of
course, legacy networks may last for a *long* time; I know of a few
places that still used ARCnet.
--
Rich Seifert Networks and Communications Consulting
21885 Bear Creek Way
(408) 395-5700 Los Gatos, CA 95033
(408) 228-0803 FAX
Send replies to: usenet at richseifert dot com |
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T. Sean Weintz
Guest
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| Posted:
Wed Dec 15, 2004 11:14 pm Post subject:
Re: What would be a non-transparent bridge? |
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Rich Seifert wrote:
| Quote: | I know of a few
places that still used ARCnet.
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Sheesh. Ya, come to think of it I know of a place that does too. Arcnet
over fiber at that. |
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Michelot
Guest
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| Posted:
Thu Dec 16, 2004 2:14 am Post subject:
Re: What would be a non-transparent bridge? |
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Thanks Rich for the history of the concept "transparent bridge".
| Quote: | no longer used today. (There is a complete discussion of Source Routing
Bridges in Chapter 6 of "The Switch Book".)
|
The contents of your book is very interesting. I will ask if it is available
in my school library, and suggest to buy it if not.
| Quote: | Trivia: A "transparent" object is one which is physically present, but
can be treated as if it was not (e.g., a transparent bridge). The
opposite is a "virtual" object, which is not physically present, but can
be treated as if it was.
|
I would like to write that in epigraph, on the first page of a training in
network introduction. Could I write your name as the author of this trivia?
Regards,
Michelot |
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News Me
Guest
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| Posted:
Thu Dec 16, 2004 2:28 am Post subject:
Re: What would be a non-transparent bridge? |
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Rich Seifert wrote:
| Quote: |
Trivia: A "transparent" object is one which is physically present, but
can be treated as if it was not (e.g., a transparent bridge). The
opposite is a "virtual" object, which is not physically present, but can
be treated as if it was.
|
Metaphysical, mystical, ethereal. Could it be that Rich is waxing
toward the philosophical in his middle age..?
NM |
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Neill Massello
Guest
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| Posted:
Thu Dec 16, 2004 2:36 am Post subject:
Re: What would be a non-transparent bridge? |
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News Me <newsTWOme@pacifierDOTcom> wrote:
| Quote: | Rich Seifert wrote:
Trivia: A "transparent" object is one which is physically present, but
can be treated as if it was not (e.g., a transparent bridge). The
opposite is a "virtual" object, which is not physically present, but can
be treated as if it was.
Metaphysical, mystical, ethereal. Could it be that Rich is waxing
toward the philosophical in his middle age..?
|
How many geeks can dance on a transparent bridge? |
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News Me
Guest
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| Posted:
Thu Dec 16, 2004 4:15 am Post subject:
Re: What would be a non-transparent bridge? |
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Neill Massello wrote:
| Quote: | News Me <newsTWOme@pacifierDOTcom> wrote:
Rich Seifert wrote:
Trivia: A "transparent" object is one which is physically present, but
can be treated as if it was not (e.g., a transparent bridge). The
opposite is a "virtual" object, which is not physically present, but can
be treated as if it was.
Metaphysical, mystical, ethereal. Could it be that Rich is waxing
toward the philosophical in his middle age..?
How many geeks can dance on a transparent bridge?
|
I've never danced on one, but in my time I've kicked around a Vitalink
or two... What happens when one implements a virtual bridge within a
transparent bridge? Or vice versa? |
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jpd
Guest
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| Posted:
Thu Dec 16, 2004 5:07 am Post subject:
Re: What would be a non-transparent bridge? |
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Begin <10s1hc8pk8h2m6c@corp.supernews.com>
On 2004-12-15, News Me <newsTWOme@pacifierDOTcom> wrote:
| Quote: | Neill Massello wrote:
News Me <newsTWOme@pacifierDOTcom> wrote:
Rich Seifert wrote:
Trivia: A "transparent" object is one which is physically present, but
can be treated as if it was not (e.g., a transparent bridge). The
opposite is a "virtual" object, which is not physically present, but can
be treated as if it was.
Metaphysical, mystical, ethereal. Could it be that Rich is waxing
toward the philosophical in his middle age..?
How many geeks can dance on a transparent bridge?
I've never danced on one, but in my time I've kicked around a Vitalink
or two... What happens when one implements a virtual bridge within a
transparent bridge? Or vice versa?
|
Two bridging routers configured as half-bridges to form a virtual
transparant bridge. Which box does one dance on? Choices, choices...
--
j p d (at) d s b (dot) t u d e l f t (dot) n l .
So far I've only stood on a router. I knew I'd missed something. |
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Hansang Bae
Guest
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| Posted:
Thu Dec 16, 2004 5:18 am Post subject:
Re: What would be a non-transparent bridge? |
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On Wed, 15 Dec 2004 15:15:21 -0800, News Me <newsTWOme@pacifierDOTcom>
wrote:
| Quote: | I've never danced on one, but in my time I've kicked around a Vitalink
or two... What happens when one implements a virtual bridge within a
transparent bridge? Or vice versa?
|
I actually liked Vitalink TransLAN bridges. It was an interesting
concept anyway.
--
hsb
"Somehow I imagined this experience would be more rewarding" Calvin
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James Knott
Guest
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| Posted:
Thu Dec 16, 2004 5:18 am Post subject:
Re: What would be a non-transparent bridge? |
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News Me wrote:
| Quote: | Metaphysical, mystical, ethereal. Could it be that Rich is waxing
toward the philosophical in his middle age..?
|
Ethereal is a network analyzer. ;-) |
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Rich Seifert
Guest
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| Posted:
Thu Dec 16, 2004 5:18 am Post subject:
Re: What would be a non-transparent bridge? |
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In article <41c0a94f$0$10194$8fcfb975@news.wanadoo.fr>,
"Michelot" <mhostettler@wanadooNOSPAM.fr> wrote:
| Quote: |
Trivia: A "transparent" object is one which is physically present, but
can be treated as if it was not (e.g., a transparent bridge). The
opposite is a "virtual" object, which is not physically present, but can
be treated as if it was.
I would like to write that in epigraph, on the first page of a training in
network introduction. Could I write your name as the author of this trivia?
|
Sure. While perhaps someone else has said the same thing, I made the
realization independently, and use the comparison often in my own
classes.
--
Rich Seifert Networks and Communications Consulting
21885 Bear Creek Way
(408) 395-5700 Los Gatos, CA 95033
(408) 228-0803 FAX
Send replies to: usenet at richseifert dot com |
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