Xref: utzoo comp.protocols.tcp-ip:13286 alt.sys.sun:1616
Newsgroups: comp.protocols.tcp-ip,alt.sys.sun,jpl.sun-nets
Path: utzoo!utgpu!freedom!elroy.jpl.nasa.gov!news
From: cyamamot@kilroy.jpl.nasa.gov (Cliff Yamamoto)
Subject: Our Sun isn't "RIPing"
Message-ID: <1990Oct7.000448.26450@elroy.jpl.nasa.gov>
Originator: cyamamot@kilroy
Keywords: RIP, router, passive
Sender: news@elroy.jpl.nasa.gov (Usenet)
Nntp-Posting-Host: kilroy.jpl.nasa.gov
Organization: Jet Propulsion Laboratory, Pasadena, CA
Date: Sun, 7 Oct 90 00:04:48 GMT

Greetings network gurus!

We have a Sun Sparc+ running as a file server and router for our building's
LAN.  We also have a Banyan server running as passive router on the same
physical ethernet.  On this same ethernet, we have various PCs.  Some are
running PC-NFS while others are running PC/TCP on top of Vines.  A picture
is probably in order:


     PC  . . .   PC  . . .   PC  . . . etc      Banyan
     |           |           |               +--Server--+
     |           |           |               |          |        x.x.63.1
     +-----------+-----------+---------------+----------+-----------+
  x.x.63.10   x.x.91.20   x.x.91.21      x.x.63.107  x.x.91.1       |
                                                                   Sun
                                                                  Sparc+
where: x.x.63.x is Tcp/Ip & NFS                                     |
       x.x.91.x is Banyan/Vines        x.x.1.137  x.x.1.xxx         |
       x.x.1.xx is Labwide backbone     ----------------------------+
                                           |          |         x.x.1.165
                                          Sun       other
                                           A     hosts & subnets

The situation:

- We have /etc/gateways on the Sun Sparc+ configured as required.
- All the PCs on the 63.x and 91.x subnets can ping each other fine.
- All the PCs on the 63.x can ping the x.x.1.xxx hosts and vice-versa.
- The Sun Sparc+ can ping all hosts on all subnets.

The problem:

- NONE of the 91.x hosts can ping the x.x.1.xxx hosts and vice-versa.

The probable cause?

- The Sun Sparc+ is not sending out RIP info to the hosts on x.x.1.xxx
  about the 91.x subnet.

The test:

- We added an explicit /etc/gateway routing entry at Sun A.  It basically
  tells Sun A that all x.x.91.0 traffic should route to x.x.1.165 with a
  metric of 1 and passive.  THIS WORKED!!  Sun A was able to ping all PCs
  on the 91.x subnet and vice-versa.

The question:

So does anyone know what causes this?  We don't have access to a sniffer so
it makes it difficult to see if the Sparc+ is sending out info.  Is there
something we missed?  Any help would be appreciated.

Thanks in advance!
Cliff Yamamoto