I beg to differ on this one. I'm currently dealing with a network that has
4 VLANs. Two of those VLANs use multiple subnets. the only thing you need
to do to make another subnet work on a VLAN is a secondary IP on the router
interface for that VLAN. Remember - VLANs are layer 2 (MAC address), not
Layer 3 (IP address). The only entity that cares what subnet a node belongs
to is the router.
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk: 206-770-4035
Pager: 206-994-4514
Walker
Traylor To: [EMAIL PROTECTED]
<wtraylor@cis cc:
co.com> Subject: Re: subnet vs. Vlan
Sent by:
nobody@groups
tudy.com
07/20/00
04:20 PM
Please
respond to
Walker
Traylor
You must use a router between any networks, even if they are on the same
VLAN. You do not need a router to merely connect VLANS if they are on
the same network. However, you could just make them just one VLAN in
that case.
--Walker
jeongwoo park wrote:
>
> HI all
> I have a question.
> Cisco recommends that there be one-to-one relationship
> between ip subnets and Vlans.
> When the number of devices on a Vlan exceeds the
> number of host ip addresses per configured subnet,
> more than one subnet can exit on a Vlan.
> Having said that, my question;
> There are two subnets in a Vlan. Do we need a router
> to interconnect these two subnets?
> I know that we need a router to interconnect two
> different Vlans.
> In addtion to that, can more than one vlan exist on a
> subnet?
> if so, do we still need a router to interconnect
> different vlans even if there are in a same subnet?
>
> thanks
>
> jeongwoo
>
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