topic Re: VMS TCPIP 5.3 on VMS 7.3-1 in Operating System - OpenVMS

VMS TCPIP 5.3 on VMS 7.3-1

Larry Cox — Tue, 21 Sep 2004 08:53:37 GMT

Will VMS/TCPIP relearn a route to a network device if the route changes? Or, perhaps a better question is, should VMS care as long as the default gateway is available. In this particular situation, the gateway didn't change but a subnet was added on the other side of the gateway. When that happened, connectivity to network printers was lost until I bounced TCPIP services on VMS.

A VMS newbie....
Larry Cox

Re: VMS TCPIP 5.3 on VMS 7.3-1

Ian Miller. — Tue, 21 Sep 2004 10:33:29 GMT

is dynamic routing enabled ?

Re: VMS TCPIP 5.3 on VMS 7.3-1

Larry Cox — Tue, 21 Sep 2004 11:13:46 GMT

No it isn't.

Re: VMS TCPIP 5.3 on VMS 7.3-1

Ian Miller. — Wed, 22 Sep 2004 04:05:42 GMT

Do you have the results of a traceroute to a printer at the time? I thought that the VMS system would send everything that does not have an explict route to the default gateway. I wonder if there was another problem (not routing) that was fixed by the restart of tcpip.

Re: VMS TCPIP 5.3 on VMS 7.3-1

Larry Cox — Wed, 22 Sep 2004 07:32:15 GMT

No I don't and you are correct it could be another but related problem.

I am accustomed to other OS's depending on a default gateway to route WAN traffic. I have heard that VMS handles WAN traffic differently and depends on "learned routes" in cache. Is that true and can you explain?

Re: VMS TCPIP 5.3 on VMS 7.3-1

Ian Miller. — Wed, 22 Sep 2004 10:57:09 GMT

If dynamic routing is not enabled then VMS uses the static defined routines. However I have seen TCPIP for VMS pick up routes when mtu_path was set to 1

The core routing functionality should act the same as HPUX (as that is where the tcpip stack came from).

Re: VMS TCPIP 5.3 on VMS 7.3-1

Larry Cox — Thu, 23 Sep 2004 08:14:10 GMT

OK, Thanks!