Two different VLANs on the same port

Two different VLANs on the same port
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Two different VLANs on the same port hoeriksen 12-15-2006
Posted by on December 15, 2006, 8:02 am
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Disclaimer: Stupid questions may follow.
What I want to do is to set up a backbone LAN and a mangement LAN. I'm
therefore trying to find out if it's possible for me to set up my
D-Link 3526 so that my connected hosts can be on two different VLANs at
the same time. On the hosts I'm thinking that the adapter may be set up
with for instance: VLAN 1 (Backbone): Mask: 255.255.255.0. Ip-range
10.0.0.1 - .254 and VLAN 2 (Mngmt): Mask: 255.255.255.0. IP-range
10.0.1.0 - .254.

Does this sound feasible? I'm a bit scared of stuffing this up since
the Backbone LAN is already in production (though not set up with a
VLAN). If anyone has a different way to set up the two LANs, then any
information is much appreciated!

Thanks,
H=E5vard


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Posted by BernieM on December 15, 2006, 4:00 pm
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Disclaimer: Stupid questions may follow.
What I want to do is to set up a backbone LAN and a mangement LAN. I'm
therefore trying to find out if it's possible for me to set up my
D-Link 3526 so that my connected hosts can be on two different VLANs at
the same time. On the hosts I'm thinking that the adapter may be set up
with for instance: VLAN 1 (Backbone): Mask: 255.255.255.0. Ip-range
10.0.0.1 - .254 and VLAN 2 (Mngmt): Mask: 255.255.255.0. IP-range
10.0.1.0 - .254.

Does this sound feasible? I'm a bit scared of stuffing this up since
the Backbone LAN is already in production (though not set up with a
VLAN). If anyone has a different way to set up the two LANs, then any
information is much appreciated!

Thanks,
Håvard

If your wanting to do this with single nic'd hosts the switch needs to allow
vlan trunking on the port. Frames are 'tagged' according to which vlan
they're in. The most common tagging standard is "802.1q".

http://en.wikipedia.org/wiki/Trunking

http://en.wikipedia.org/wiki/IEEE_802.1Q

BernieM



Posted by on December 18, 2006, 7:37 am
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>
> If your wanting to do this with single nic'd hosts the switch needs to allow
> vlan trunking on the port. Frames are 'tagged' according to which vlan
> they're in. The most common tagging standard is "802.1q".
>
The hosts actually have to nic's but the other one is used for
production "outwards" and needs to be left as it is. But if I
understand you correctly it's just a matter of setting up the two
VLAN's and specify that the connected ports are to be part of both
VLANs? The nic drivers (Intel mostly) should be able to differentiate
the received frames?

> http://en.wikipedia.org/wiki/Trunking
>
> http://en.wikipedia.org/wiki/IEEE_802.1Q
>
> BernieM


Posted by BernieM on December 18, 2006, 2:10 pm
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>
>>
>> If your wanting to do this with single nic'd hosts the switch needs to
>> allow
>> vlan trunking on the port. Frames are 'tagged' according to which vlan
>> they're in. The most common tagging standard is "802.1q".
>>
>
>> http://en.wikipedia.org/wiki/Trunking
>>
>> http://en.wikipedia.org/wiki/IEEE_802.1Q
>>
>> BernieM
>
> The hosts actually have to nic's but the other one is used for
> production "outwards" and needs to be left as it is. But if I
> understand you correctly it's just a matter of setting up the two
> VLAN's and specify that the connected ports are to be part of both
> VLANs? The nic drivers (Intel mostly) should be able to differentiate
> the received frames?

There would be some change at the nic / os to configure them for trunking
dot1q encapsulation. Once that's done, yes, the nic / stack will
differentiate between tagged frames but what's going on at the switch end?
You need layer-3 switching / routiung to forward frames between the
different vlans / subnets.

BernieM



Posted by CK on December 16, 2006, 5:52 am
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Is DLINK 3526 supports VLAN tagging.

If not then you can have LINUX box creating VLAN's and managing network
and DLINK will be just a Swicth working edge.



CK




hoeriksen@gmail.com wrote:
> Disclaimer: Stupid questions may follow.
> What I want to do is to set up a backbone LAN and a mangement LAN. I'm
> therefore trying to find out if it's possible for me to set up my
> D-Link 3526 so that my connected hosts can be on two different VLANs at
> the same time. On the hosts I'm thinking that the adapter may be set up
> with for instance: VLAN 1 (Backbone): Mask: 255.255.255.0. Ip-range
> 10.0.0.1 - .254 and VLAN 2 (Mngmt): Mask: 255.255.255.0. IP-range
> 10.0.1.0 - .254.
>
> Does this sound feasible? I'm a bit scared of stuffing this up since
> the Backbone LAN is already in production (though not set up with a
> VLAN). If anyone has a different way to set up the two LANs, then any
> information is much appreciated!
>=20
> Thanks,
> H=E5vard


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