Wired Networks Thread, Different default gateway per VLAN in Technical; In essence my thread title explains my question.
Is it possible (with an HP Procurve based LAN) to have a ...
25th April 2012, 11:39 AM #1
Different default gateway per VLAN
In essence my thread title explains my question.
Is it possible (with an HP Procurve based LAN) to have a different default gateway for each VLAN?
For example (and this is a very simplified example)...
VLAN 1 (10.1.1.0/24 - normal network clients) need the core switch to send traffic to a default gateway of 10.1.1.1 (Smoothwall NIC 1)
VLAN 999 (10.2.1.0/24 - iPads and other such tablets) need the core switch to send traffic to a default gateway of 10.2.1.1 (Smoothwall NIC 2, set as a transparent proxy with SSL based auth)
I seem to be only able to set one global default gateway on my core switch (5412zl).
*UPDATE* I've had a break from typing this and I've now got to the point where I'm pretty sure I'm approaching this the wrong way and what I need to do is setup custom routes on my switch to route traffic depending upon the source location. Does that sound right?
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25th April 2012, 12:26 PM #2
Looks like how its set up on my A5800s; I can only set an IP and mask for a VLAN interface, not a gateway, but there's no end of static routes set up for different client & management VLANs.
25th April 2012, 12:33 PM #3
Ta - I'm not sure if I can setup different default routes based on traffic source though. Doesn't look like it's possible to do it.
I may have to think about this from a different angle. Essentially the issue is Smoothwall authentication and iPads... meh. I need more coffee.
25th April 2012, 12:34 PM #4
Thinking about it, wouldn't you actually set the default gateway on the DHCP scope options for that VLAN?
25th April 2012, 12:36 PM #5
Yep... but that would have to be the IP address of the VLAN on the switch surely? Otherwise how would traffic route between VLANs?
Unless I make the Smoothwall box do the routing, but I'm not sure a) if it can. b) if that's not a really naff idea.
Last edited by pantscat; 25th April 2012 at 12:38 PM.
Reason: general sloppiness and lack of attention to detail.
25th April 2012, 12:45 PM #6
Ah, fair point. Didn't think about that. Flu is still eating my brain alive.
Looks like the Smoothwall can do some routing - it has sections for subnets and RIP - but don't know if it could meet needs.
If it's entirely guest wireless it shouldn't matter about the rest of the network, of course, but I imagine it includes school kit that needs access to domain servers?
25th April 2012, 12:53 PM #7
Exactly that... it's school kit that ideally would use the DCs for DHCP and DNS resolution. It doesn't really need to access much else... but you never know!
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