BENCHOFF@VTVM1.CC.VT.EDU (Phil Benchoff) (11/29/89)
I am having a problem setting a subnet mask for one of the networks
attached to my p4200. The interface address is 128.173.1.1 and the mask
I am trying to set is 255.255.224.0. I know that this is a strange
choice of masks, but three bits is all I can use at the moment without
changing a lot of IP addresses on the local cable.
>From IP Config, I ADD SUB 128.173.0.0 255.255.224.0. When I re-start
the router (rel 8.1A), it won't talk to anything on the local cable.
It doesn't even send RIP updates on the local cable. If I use an
eight-bit subnet mask, the router does send traffic onto the local
cable.
Proteon tech support says that this should work. Can anyone think of
any other configuration item that I may be forgetting? All of the hosts
on the local cable are in the range 128.173.[1-31].xxx.
Thanks, Phil Benchoff, benchoff@vtvm1.cc.vt.educliff@violet.berkeley.edu (Cliff Frost) (11/30/89)
I think the problem is that you're trying to use subnet 0, which isn't allowed. (Eg, if you had a netmask of 255.255.255 you couldn't use 128.173.0.1.) Given the range of addresses on the cable I can't think of a solution short of changing the addresses in at least some of the machines, but I could be wrong. Obviously it would be nice if the IP Config process told you at config time that you did something wrong, but I know from experience that it doesn't, nor do any enlightening messages appear in process 2 at runtime when the router obviously detects the problem. Cliff Frost, cliff@berkeley.edu Re: In article <8911291406.AA00281@devvax.TN.CORNELL.EDU> BENCHOFF@VTVM1.CC.VT.EDU (Phil Benchoff) writes: >I am having a problem setting a subnet mask for one of the networks >attached to my p4200. The interface address is 128.173.1.1 and the mask >I am trying to set is 255.255.224.0. I know that this is a strange >choice of masks, but three bits is all I can use at the moment without >changing a lot of IP addresses on the local cable. > >>From IP Config, I ADD SUB 128.173.0.0 255.255.224.0. When I re-start >the router (rel 8.1A), it won't talk to anything on the local cable. >It doesn't even send RIP updates on the local cable. If I use an >eight-bit subnet mask, the router does send traffic onto the local >cable. > >Proteon tech support says that this should work. Can anyone think of >any other configuration item that I may be forgetting? All of the hosts >on the local cable are in the range 128.173.[1-31].xxx. > >Thanks, Phil Benchoff, benchoff@vtvm1.cc.vt.edu