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Posted by vicky on June 30, 2008, 8:01 am
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> > hi,
> > =A0 =A0 is there is a necessity of route field in layer 2 switch ...
>
> Can you be more specific in describing what you are asking?
>
> For example, to me it souds like you are asking whether layer 2
> connectivity MUST be provided within a mesh of layer 2 switches
> (bridges).
>
> If that's what you're asking, then it all depends what you want to do.
> For example, you can simply not connect these switches together at
> all. Just use them as the hub of a star-topology network, for multiple
> independent star networks. If you want to allow connectivity among the
> many star topologies, you simply install layer 3 routers between them,
> as necessary.
>
> VLANs are supposed to emulate physcially separate LANs, or physically
> separate catenets (to be more precise). If you build a network of
> layer 2 switches in which each Ethernet segment belongs to a different
> VLAN, you are emulating a case of multiple independent, physically
> disconnected LANs. Your previous example did not permit any
> communications between the Ethernet LANs at all, at layer 2.
>
> Bert
----------------------------------------
what is the mac_service_data_unit
what part of frame is it contain
as in IEEE standard of stp and 1q here mentioned this term
The
frame_type,
mac_action,
destination_address,
source_address,
mac_service_data_unit,
user_ priority,
and frame_check_sequence
please also tell me
is the sequence of a mac frame is seems to be changed
as normally tell the frame as
DA, SA, Type, Data, FCS
but here in IEEE stp and 1q the sequence seems from frame type ...
-------------------------
plz tell me the description of the
frame_type,
mac_action,
destination_address,
source_address,
mac_service_data_unit,
user_ priority,
and frame_check_sequence
and also tell how a end station make user priority
or a host is not vlan aware then also is it able to send priority
tagged frames (null VLAN ID).
Thanks
Vikrant
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