route field

route field
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Subject Author Date
route field vicky 06-29-2008
---> Re: route field Walter Roberson06-29-2008
---> Re: route field Albert Manfredi06-29-2008
Posted by vicky on July 4, 2008, 2:00 am
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wrote:
> In article
>
>
>
>
>
>
> > As u mentioned here above in u'r point that
>
> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if the bridge is "tunneling=
," or bridging, an
> > FDDI
> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0> frame from one FDDI LAN to=
another FDDI LAN,
> > for example, and there
> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0> are some Ethernet segments=
between the two FDDI
> > LANs, then the VLAN
> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0> tag can carry that FDDI "s=
ource routing"
> > information. It's a way of
> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0> allowing frames from diffe=
rent MACs to be
> > bridged, without losing
> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0> extra header information a=
vailable in the non-
> > Ethernet LANs.
>
> > so for doing that function is a brigde is capable of doing routing (is
> > bridge is source routed bridge) or it done at normally also.
>
> Tunneling is *not* routing. The point made above is that an Ethernet
> bridge can be used to tunnel source-route information (including CFI
> information) between two source-route-capable LANs (e.g., Token Ring or
> FDDI) across a non-source-route-capable Ethernet backbone. The Ethernet
> bridge is not performing any source-route function, only passing along
> the information.
>
> > One more thing is about that type of tunneling is it done
> > automatically or a programmer has also play a role for this , and if a
> > programmer has a role than also tell me some about of this role.
>
> The tunneling function must be designed into the bridge. It can be
> performed either in hardware or software.
>
> --
> Rich Seifert =A0 =A0 =A0 =A0 =A0 =A0 =A0Networks and Communications Consu=
lting
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 21885 Bear Creek Way
> (408) 395-5700 =A0 =A0 =A0 =A0 =A0 =A0Los Gatos, CA 95033
> (408) 228-0803 FAX
>
> Send replies to: usenet at richseifert dot com- Hide quoted text -
>
> - Show quoted text -

-----------------------------------------------------------

can u please highligted the following with detail....................

The tunneling function must be designed into the
bridge. It can be
performed either in hardware or software.


Thanks

regards

Vikrant Pandey

NMFall 20%
Posted by Rich Seifert on July 4, 2008, 11:22 am
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In article

> can u please highligted the following with detail....................
>
> The tunneling function must be designed into the
> bridge. It can be
> performed either in hardware or software.
>

The statement means exactly what it says. A device cannot tunnel unless
it is designed to do so. The tunneling function can be implemented
either in hardware (e.g., in a finite-state machine), or in software
(e.g., as code executed by a microprocessor). The choice is a matter of
implementation preference, performance, and cost.


--
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

Posted by vicky on July 14, 2008, 1:47 am
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Hello

Please access my share web file link ---


http://vikrantpandey.diinoweb.com/files/


and please see my query which is in the vlan case1.jpg file.


Thanks in advance


Vikrant

Posted by vicky on July 5, 2008, 9:24 am
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Hello Sir

What u say about inter-port based-vlan communication is it
possible ..... if
yes plz tell how ????
please.........


Thanks

Vikrant

Posted by Walter Roberson on July 5, 2008, 11:02 am
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>What u say about inter-port based-vlan communication is it
>possible ..... if
>yes plz tell how ????
>please.........

It is *not* possible on any Layer 2 switch unless that switch has bugs
in its hardware or software.

(Some Layer 2 switches allow you to deliberately configure intra-vlan
communications, but I count that as a bug.)

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