(PM) Location/routing problems

Terje Sten Bjerkseth (tsb@infotron.no)
Tue, 19 May 1998 10:41:24 +0200

We've seen another problem with our PM2E ComOS 3.7.2 using BRI. We have
two locations; they are set up practically identically. Both route to a
/24 network (private address space). One location "always" work; the
other seem to work after the PM is booted, but doesn't afterwards. Also,
I have some "strange" output from ifconfig, below.

After a boot, routing for this location shows:

trd-pm2> show route 172.29.200.1
Destination Mask Gateway Source Flag Met Interface
----------------- ---- -------------------- ------- ---- --- ---------
172.29.200.0 24 172.29.200.1 local NL 1 ptp22

trd-pm2> show route 172.29.200.0
Destination Mask Gateway Source Flag Met Interface
----------------- ---- -------------------- ------- ---- --- ---------
172.29.200.0 24 172.29.200.1 local NL 1 ptp22

*After* the first dial, it seems, the routes are changed. From my PC, I
now get a "destination unreachable" from the PM when tracerouting to
this location. The routes show:

trd-pm2> show route 172.29.200.1
Destination Mask Gateway Source Flag Met Interface
----------------- ---- -------------------- ------- ---- --- ---------
172.29.200.1 32 172.29.200.1 local HL 1 ptp22
trd-pm2> show route 172.29.200.0
Destination Mask Gateway Source Flag Met Interface
----------------- ---- -------------------- ------- ---- --- ---------
trd-pm2>

How come this is changed to a host route?

I have no filters on ether0. Also, ifconfig shows the following:

ptp22:
flags=765<IP_UP,IPX_DOWN,POINT_TO_POINT,PRIVATE,IFILTER,OFILTER,SUSPENDE
D
>
dest 172.29.200.1 netmask ffffffff mtu 1500
ptp23: flags=165<IP_UP,IPX_DOWN,POINT_TO_POINT,PRIVATE,SUSPENDED>
dest 172.29.220.253 netmask ffffff00 mtu 1500

Notice the IFILTER,OFILTER in ptp22 (which doesn't work). Why are they
there? There are NO filters on this location, have even done set <loc>
ifilter, set <loc> ofilter and save all to make sure. How can I remove
them?

Ideas?

(Incidentally, there are Cisco 761s in the other end of both these
locations. They are running different versions. I believe the one which
works is running 4.2(1) and the one that doesn't is running 4.1(1) or
something. *Should* be no routes propagated, but we'll still try to get
the one upgraded and re-check the config.)

-tsb

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