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Home > Archive > alt.certification.cisco > June 2002 > VLAN / Routing question
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VLAN / Routing question
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| patrick 2002-06-24, 6:37 pm |
| In order to communicate between VLANS, a router is needed. Does this
mean that a VLAN can only exist within a specific network address ?
For example, if I have VLAN-1 on network address 192.168.1.0/24, and I want
to create a VLAN-2, does this mean that this VLAN-2 can only exist on a
totally separate network (for example 192.168.2.0/24) ?
| |
| Jeff Hunt 2002-06-24, 6:37 pm |
| Hi Patrick
It sure does. Each VLAN uses it's own subnet.
Charlie
"patrick" <india_aus@hotmail.com> wrote in message
news an.2002.06.19.19.57.00.69353.12620@hotmail.com...
> In order to communicate between VLANS, a router is needed. Does this
> mean that a VLAN can only exist within a specific network address ?
>
> For example, if I have VLAN-1 on network address 192.168.1.0/24, and I
want
> to create a VLAN-2, does this mean that this VLAN-2 can only exist on a
> totally separate network (for example 192.168.2.0/24) ?
| |
| Reuben Stump 2002-06-24, 6:37 pm |
| Yup, they'd both be a "virtual LAN" completely isolated from each other
unless you set up a router.
Some of the higher end switches actually do routing between VLANs, so you
can set up inter-VLAN routing without an external router.
"Jeff Hunt" <jeff_hunt@hotmail.com> wrote in message
news:3d113fdb$0$20999$afc38c87
@news.optusnet.com.au...
> Hi Patrick
>
> It sure does. Each VLAN uses it's own subnet.
>
> Charlie
>
> "patrick" <india_aus@hotmail.com> wrote in message
> newsan.2002.06.19.19.57.00.69353.12620@hotmail.com...
> > In order to communicate between VLANS, a router is needed. Does this
> > mean that a VLAN can only exist within a specific network address ?
> >
> > For example, if I have VLAN-1 on network address 192.168.1.0/24, and I
> want
> > to create a VLAN-2, does this mean that this VLAN-2 can only exist on a
> > totally separate network (for example 192.168.2.0/24) ?
>
>
| |
| patrick 2002-06-24, 6:37 pm |
| On Wed, 19 Jun 2002 23:49:50 -0400, Reuben Stump wrote:
> Yup, they'd both be a "virtual LAN" completely isolated from each other
> unless you set up a router.
>
> Some of the higher end switches actually do routing between VLANs, so
> you can set up inter-VLAN routing without an external router.
>
>
> "Jeff Hunt" <jeff_hunt@hotmail.com> wrote in message
> news:3d113fdb$0$20999$afc38c87
@news.optusnet.com.au...
>> Hi Patrick
>>
>> It sure does. Each VLAN uses it's own subnet.
>>
>> Charlie
>>
>> "patrick" <india_aus@hotmail.com> wrote in message
>> newsan.2002.06.19.19.57.00.69353.12620@hotmail.com...
>> > In order to communicate between VLANS, a router is needed. Does this
>> > mean that a VLAN can only exist within a specific network address ?
>> >
>> > For example, if I have VLAN-1 on network address 192.168.1.0/24, and
>> > I
>> want
>> > to create a VLAN-2, does this mean that this VLAN-2 can only exist on
>> > a totally separate network (for example 192.168.2.0/24) ?
>>
>>
Thanks for your responses guys.
One further question.....based on what you've said already, would it be
impossible for VLAN-1 to have nodes on subnet 192.168.1.0/24 AND
192.168.2.0/24 ?
| |
| Hansang Bae 2002-06-24, 6:37 pm |
| In article <pan.2002.06.20.00.11.03.996530.12620@hotmail.com>,
india_aus@hotmail.com says...
> Thanks for your responses guys.
> One further question.....based on what you've said already, would it be
> impossible for VLAN-1 to have nodes on subnet 192.168.1.0/24 AND
> 192.168.2.0/24 ?
It wouldn't be impossible. You could use secondary addressing or use a NIC
that's VLAN-aware.
--
hsb
"Somehow I imagined this experience would be more rewarding" Calvin
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| |
| Kurt Hutchison 2002-06-24, 6:40 pm |
| Take a look at the cisco web site for a lab called "router on a stick".
This is a lab that uses a router to allow to VLANs to send traffic to each
other.
You will need a router that has an IOS that supports ISL in order for this
to work.
"Reuben Stump" <r_stump@no.spam.bellsouth.net> wrote in message
news:v6cQ8.18349$jT.4693891@e3500-atl1.usenetserver.com...
> Yup, they'd both be a "virtual LAN" completely isolated from each other
> unless you set up a router.
>
> Some of the higher end switches actually do routing between VLANs, so you
> can set up inter-VLAN routing without an external router.
>
>
> "Jeff Hunt" <jeff_hunt@hotmail.com> wrote in message
> news:3d113fdb$0$20999$afc38c87
@news.optusnet.com.au...
> > Hi Patrick
> >
> > It sure does. Each VLAN uses it's own subnet.
> >
> > Charlie
> >
> > "patrick" <india_aus@hotmail.com> wrote in message
> > newsan.2002.06.19.19.57.00.69353.12620@hotmail.com...
> > > In order to communicate between VLANS, a router is needed. Does this
> > > mean that a VLAN can only exist within a specific network address ?
> > >
> > > For example, if I have VLAN-1 on network address 192.168.1.0/24, and I
> > want
> > > to create a VLAN-2, does this mean that this VLAN-2 can only exist on
a[col
or=darkred]
> > > totally separate network (for example 192.168.2.0/24) ?
> >
> >
>
>
>[/color]
| |
| Kurt Hutchison 2002-06-24, 6:40 pm |
| Take a look at the cisco web site for a lab called "router on a stick".
This is a lab that uses a router to allow to VLANs to send traffic to each
other.
You will need a router that has an IOS that supports ISL in order for this
to work.
"Reuben Stump" <r_stump@no.spam.bellsouth.net> wrote in message
news:v6cQ8.18349$jT.4693891@e3500-atl1.usenetserver.com...
> Yup, they'd both be a "virtual LAN" completely isolated from each other
> unless you set up a router.
>
> Some of the higher end switches actually do routing between VLANs, so you
> can set up inter-VLAN routing without an external router.
>
>
> "Jeff Hunt" <jeff_hunt@hotmail.com> wrote in message
> news:3d113fdb$0$20999$afc38c87
@news.optusnet.com.au...
> > Hi Patrick
> >
> > It sure does. Each VLAN uses it's own subnet.
> >
> > Charlie
> >
> > "patrick" <india_aus@hotmail.com> wrote in message
> > newsan.2002.06.19.19.57.00.69353.12620@hotmail.com...
> > > In order to communicate between VLANS, a router is needed. Does this
> > > mean that a VLAN can only exist within a specific network address ?
> > >
> > > For example, if I have VLAN-1 on network address 192.168.1.0/24, and I
> > want
> > > to create a VLAN-2, does this mean that this VLAN-2 can only exist on
a[col
or=darkred]
> > > totally separate network (for example 192.168.2.0/24) ?
> >
> >
>
>
>[/color]
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