Mac address and VLAns

Mac address and VLAns
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Mac address and VLAns vicky 06-17-2008
Posted by vicky on June 27, 2008, 2:28 am
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wrote:
> In article
>
>
> > Can u plz tell me about the DA (Destination Mac Address) =A0 and =A0 SA
> > (Source mac Address)
>
> > of a frame which contains multicast data (or multicast member ship
> > requist or leave requist)
>
> > is at this case =A0is =A0DA =3D=3D SA
> > or SA contain a unique mac address of either router or host.
>
> You really should read the relevant standards (IEEE 802.3, IEEE
> 802.1D/Q) and then ask your questions, rather that looking to this group
> to provide a tutorial on every aspect of your design.
>
> That said, a source MAC address is never a multicast; it is always a
> unique identifier of the station sending the frame, whether an end
> station or 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

---------------------------------------------------------------------------=
---

Hello Sir,

I've a query with me regarding with Single STP with multiple port
based vlans

then
What u say about a single instance of STP is used for all port based
vlans

for exp-

If using a switch controller with only IEEE 802.1D support and using
port based vlans

then plz tell me is at this scenerio any mechanism is implemented for
making inter - vlan data transmission accessible.

Thanks

Vikrant

NMFall 20%
Posted by Walter Roberson on June 27, 2008, 2:52 am
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>I've a query with me regarding with Single STP with multiple port
>based vlans

>then
>What u say about a single instance of STP is used for all port based
>vlans

>for exp-

>If using a switch controller with only IEEE 802.1D support and using
>port based vlans

>then plz tell me is at this scenerio any mechanism is implemented for
>making inter - vlan data transmission accessible.

I believe the answer is NO, in that case there is no such mechanism.
(I looked at your diagram.)

Single instance STP does not know anything about VLANs and will
not take VLANs into account in creating the spanning tree.
If that happens to cut a link needed for a particular VLAN to make
it through the switches between two points, then Tough Tootsies.
Do not use single-instance STP with VLANs.

Posted by vicky on June 27, 2008, 3:16 am
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On Jun 27, 11:52=A0am, rober...@hushmail.com (Walter Roberson) wrote:
> In article <a3103bea-bfcf-4070-b916-e25ac6b4a...@a9g2000prl.googlegroups.=
com>,
>
> >I've a query with me regarding with Single STP with multiple port
> >based vlans
> >then
> >What u say about a single instance of STP is used for all port based
> >vlans
> >for exp-
> >If using a switch controller with only IEEE 802.1D support and using
> >port based vlans
> >then plz tell me is at this scenerio any mechanism is implemented for
> >making inter - vlan data transmission accessible.
>
> I believe the answer is NO, in that case there is no such mechanism.
> (I looked at your diagram.)
>
> Single instance STP does not know anything about VLANs and will
> not take VLANs into account in creating the spanning tree.
> If that happens to cut a link needed for a particular VLAN to make
> it through the switches between two points, then Tough Tootsies.
> Do not use single-instance STP with VLANs.

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

please check the following link

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


here a file named as stp.txt

and tell me plz what u say about this situation
is a switch controller support for inter vlan data transmission is
necessary for that situation.

Thanks

Vikrant

Posted by Rich Seifert on June 27, 2008, 11:07 am
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In article

> On Jun 27, 11:52 am, rober...@hushmail.com (Walter Roberson) wrote:
> > In article
> >
> > >I've a query with me regarding with Single STP with multiple port
> > >based vlans
> > >then
> > >What u say about a single instance of STP is used for all port based
> > >vlans
> > >for exp-
> > >If using a switch controller with only IEEE 802.1D support and using
> > >port based vlans
> > >then plz tell me is at this scenerio any mechanism is implemented for
> > >making inter - vlan data transmission accessible.
> >
> > I believe the answer is NO, in that case there is no such mechanism.
> > (I looked at your diagram.)
> >
> > Single instance STP does not know anything about VLANs and will
> > not take VLANs into account in creating the spanning tree.
> > If that happens to cut a link needed for a particular VLAN to make
> > it through the switches between two points, then Tough Tootsies.
> > Do not use single-instance STP with VLANs.
>
> -----------------------------------------------------------------
>
> please check the following link
>
> http://vikrantpandey.diinoweb.com/files/
>
>
> here a file named as stp.txt
>
> and tell me plz what u say about this situation
> is a switch controller support for inter vlan data transmission is
> necessary for that situation.
>

Your question has been answered, at least twice and perhaps more times.
I am sorry if you do not understand the answer. Perhaps you should read
the relevant standards, or an appropriate text book, so that you can
better understand the technology.

--
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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