Re: ISA Server doesn't support VLANs?
From: Dmitry Mashkov (dm_at_byte-et.ru)
Date: Mon, 22 Mar 2004 13:34:18 +0400
I forgot one important detail:
We have IP addresses from two different external networks (a.b.c1.d1 and
The problem is reproduced ONLY with two IP address from different subnets
IPs from one subnet and VLANs work OK.
IPs from different subnets and no VLANs work OK.
"Tristan Kington [MS]" <firstname.lastname@example.org> wrote in message
> Generally, if your IP infrastructure is working correctly and Windows is
> properly configured for it, ISA should also be working correctly. I've
> ISA with VLANs in the past, and there hasn't been an issue, though it was
> a different brand of hardware.
> Is there anything of interest in the IPPEXT and FWSEXT logs when the
> occurs? Can the ISA Server use itself as a Web Proxy at that point?
> This posting is provided "AS IS" with no warranties, and confers no
> "Dmitry Mashkov" <email@example.com> wrote in message
> We are migrating to new switch and LAN infrastructure and faced strange
> We have correctly running ISA with two NICs.
> Then we have to install Intel ProSET and create a tagged VLANs. So we have
> two VLANs, one is configured as LAN, second as Internet.
> IP configuration is EXACTLY the same.
> When ISA Server Firewall service is stopped, we can ping external network
> without any problems.
> But, after starting Firewall service, ping returns "Destination host
> This problem reproduces on every clean install of ISA, even with ISA 2004
> Beta 2.
> How can I make ISA to work correctly with VLANs?
> Dmitry Mashkov