Re: Query related to a stp and vlan case
- From: Albert Manfredi <bert22306@xxxxxxxxxxx>
- Date: Thu, 26 Jun 2008 13:26:36 -0700 (PDT)
On Jun 26, 1:53 pm, vicky <vikrant.pan...@xxxxxxxxx> wrote:
Hi, to all
please go to that link below to see my query stored in a file which is
accessable
as my query need some graphics along with it
http://vikrantpandey.diinoweb.com/files/
Essentially NOTHING will work in this network, as far as I can tell.
It doesn't matter whether the VLANs are statically configured by
switch port, or whether all of the ports are 802.1Q VLAN-aware. You
have no trunk links between the three switches, and none of these
switches is configured as a router, so it looks to me like nothing
will communicate.
Think about what a switch would do with a frame arriving at one port,
configured to only accept VLAN X frames, when none of its other ports
are members of that VLAN X. The frame will get dropped on the floor.
The link between switch 1 and switch 2, and between switch 2 and
switch 3 (or switch 1 and switch 3), have to be configured as trunks.
Then you can at least get frames between all the switches.
If these segments are configured as trunks, and without any router
function in the net, the three PCs off switch 2 will still NOT be able
to communicate among each other, because they each belong to different
VLANs.
If you make even those PC links trunk segments, and the PCs themselves
VLAN-aware, then you can allow each PC to intercommunicate at Layer 2
by becoming member of the same VLAN as the other PCs, or you can add
an IP layer and configure the PCs as routers. In this last case, each
PC could belong to a different VLAN, and still intercommunicate, using
IP routing to jump between different VLANs.
Bert
.
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