[c-nsp] VLAN SUBNET

[Mark Tinka]

On Wednesday 11 May 2005 11:03, Hitesh Vinzoda wrote:
> hey fellows .... got stuck in VLAN thing
>
> can neone help me regrding this i ll be very thankful
> to em...
>
> 1. We give IP to VLAN to some say ... 10.0.12.1
> 255.255.252.0
>
> than is it necessary tht each switch port assigned to
> that VLAN needs to be of same subnet or network.

Hmmh, not necessarily. As long as there's more than one 
host with the same IP range in a VLAN, they should be 
able to speak. I just think you may have more noise on 
the VLAN if you have hosts multiple (working) address 
ranges.

>
> 2. if a DHCP is configured in the other Vlan Say VLAN
> 2 and configured to lease 172.16.0.0 network IP than
> if I plug a host in in the above mentioned VLAN1 port
> through a segment containing a unmanaged switch with
> other hosts having IP of 10.0.12.0 series than will
> the host be able to get IP of range 172.16.0.0...????

Well, think of a VLAN as a dedicated switch - a group of 
VLANs form their own broadcast domain (logical switch). 
So if your DHCP server is in VLAN 2, hosts in VLAN 1 
will not see any packets to/from the DHCP server unless 
through a L3 device attached to the switch, e.g., 
router, RSM, e.t.c.

Hope this helps.

Mark.

>
> please help
>
>
> Thanks in advance
>
> Hitesh Vinzoda
>
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