Query related to a stp and vlan case

Query related to a stp and vlan case
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Query related to a stp and vlan case vicky 06-26-2008
Posted by Walter Roberson on July 5, 2008, 6:03 pm
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>VLANs share physical media with other traffic but the packets
>are at least tagged (often by port number) and usually
>encrypted to prevent traffic mixing on a logical level.

I gather that you are referring to some kind of app to app
level encryption? I'm not -aware- of any switch / router
that does encryption at the point where an untagged VLAN enters
the network, and decryption at the point where the untagged
VLAN exits the network (possibly a number of hops away), all
transparently to the hosts. Or rather, to the extent that I
have heard of such things, I would probably call them
Virtual Private Networks (VPNs) rather than encrypted VLANs -- especially
as VPNs can carry VLAN-tagged packets within them.

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Posted by Robert Redelmeier on July 6, 2008, 2:15 am
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>>VLANs share physical media with other traffic but the packets
>>are at least tagged (often by port number) and usually
>>encrypted to prevent traffic mixing on a logical level.
>
> I gather that you are referring to some kind of app to app level
> encryption? I'm not -aware- of any switch / router that does
> encryption at the point where an untagged VLAN enters the network,
> and decryption at the point where the untagged VLAN exits the
> network (possibly a number of hops away), all transparently to
> the hosts. Or rather, to the extent that I have heard of such
> things, I would probably call them Virtual Private Networks
> (VPNs) rather than encrypted VLANs -- especially as VPNs can
> carry VLAN-tagged packets within them.


Correct. I was not referring to 802.1Q tagging (layer 2)
but rather more to plain vanilla IP (layer 3) which is
probably best described as VPN.


-- Robert



Posted by vicky on July 5, 2008, 11:27 pm
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wrote:
> In article
>
>
> > What u say about =A0inter-vlan communication =A0 is it possible ..... i=
f
> > yes plz tell how ????
>
> A VLAN is a *virtual LAN*, i.e., distinct VLANs appear to be physically
> separate Local Area Networks. As with all separate networks,
> communication among them can be effected by using a router.
>
> --
> 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

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

And is inter- port based vlan communication is possible in l 2 switch
or for this the switch controller register support is required

Thanks


Vikrant

Posted by Rich Seifert on July 6, 2008, 12:39 pm
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In article

> wrote:
> > In article
> >
> >
> > > What u say about  inter-vlan communication   is it possible ..... if
> > > yes plz tell how ????
> >
> > A VLAN is a *virtual LAN*, i.e., distinct VLANs appear to be physically
> > separate Local Area Networks. As with all separate networks,
> > communication among them can be effected by using a router.
> >
>
> And is inter- port based vlan communication is possible in l 2 switch
> or for this the switch controller register support is required
>

Please read my original response. Communications among VLANs (indeed,
among *any* LANs) can be accomplished using a router. I am sorry if you
do not understand this, or if this is not the answer you want.

I have no idea what a "switch controller register" *is*, much less
whether it may be required for inter-port based VLAN communication.


--
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 7, 2008, 2:24 am
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wrote:
> In article
>
>
>
>
>
> > wrote:
> > > In article
>
>
> > > > What u say about =A0inter-vlan communication =A0 is it possible ...=
.. if
> > > > yes plz tell how ????
>
> > > A VLAN is a *virtual LAN*, i.e., distinct VLANs appear to be physical=
ly
> > > separate Local Area Networks. As with all separate networks,
> > > communication among them can be effected by using a router.
>
> > And is inter- port based vlan communication is possible in l 2 switch
> > or for this the switch controller register support is required
>
> Please read my original response. Communications among VLANs (indeed,
> among *any* LANs) can be accomplished using a router. I am sorry if you
> do not understand this, or if this is not the answer you want.
>
> I have no idea what a "switch controller register" *is*, much less
> whether it may be required for inter-port based VLAN communication.
>
> --
> 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 -

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

Hello Sir

I ve a query related to inter-vlan(port based) communication
so first please read my query which in my share web file
named as

stp and vlan case.txt

the link for my share web file is --


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

please read it and then please reply.



Thanks



Vikrant

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