ISA 2006 Routing issue

[tperachio]

I am having problems trying to create a route to 2 subnets and i get the following error:

H:\>route add 10.0.1.0 mask 255.255.0.0 10.0.0.4
The route addition failed: The specified mask parameter is invalid. (Destination
& Mask) != Destination.

Our internal network is setup as such:

10.0.0.0 servers isa server is on this segment
10.0.1.0 printers
10.0.2.0 end user pc's

the mask that was setup before i arrived is 255.255.0.0

the network seems to be fine, don't seem to experience any problems, should the mask be set to a class 3
255.255.255.0

need help figuring this out

 

[ADB100]

It sounds like you have logically separated the devices but not physically put them on different VLAN's and are routing between them. That's pretty inefficient use of IP address space even if you are using RFC1918 network 10.0.0.0/8.

If your ISA server is already on network 10.0.0.0/16 then you don't need to add any routes to this network (it covers all hosts from 10.0.0.0 to 10.0.255.255).

If you don't need 65534 hosts on this VLAN then I would look at breaking it down; ideally don't make any networks bigger than /23 (max 510 hosts).

HTH

Andy