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Date:      Mon, 29 May 2000 12:58:38 +0930 (CST)
From:      Stavros Patiniotis <stavros@esc.net.au>
To:        freebsd-questions@FreeBSD.ORG
Subject:   connectivity problems
Message-ID:  <Pine.BSI.4.02.10005291200580.4310-100000@bang.esc.net.au>
In-Reply-To: <20000529022742.073F237B9CB@hub.freebsd.org>

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Hello,

I have experienced this on two separate networks.  The backbone in both
case is a Cisco Cataylst swicth (one was 1900 the other 2900). FreeBSD
v3.3 is in use at both networks.

10.0.0.128/255.255.255.192
routed to access server (10.0.0.7) for dialup customers

After some time of no activity on the network anyone whois dialed in to
the access server can not contact the machines on 10.0.0.14,10.0.0.15
The machine all have the correct netmask being:

10.0.0.1 (router)		255.255.255.224
10.0.0.2 (mail)	 		255.255.255.224
10.0.0.3 (www)	 		255.255.255.224
10.0.0.7 (access server)	255.255.255.224
10.0.0.14 (proxy1)		255.255.255.224
10.0.0.15 (proxy2)	 	255.255.255.224


The mail machine is always accessible, maybe becuase it has radius and
named running, keeping the connection to the access server and client
alive.

Externally to the network I can at all times traceroute to the dialup
customer, and the proxy servers.  As soon as I trace route to the proxy
servers and 'open' the connection, the dialup customer can begin to use
the proxy.  The proxy will remain 'open' to the dialup user unless no data
is transfered for more than 5-15 minutes.  When it is not working the
client cannot access either proxy.

If a connection to one of the proxies is opened, the other proxy becomes
available.

The access server and router's ethernet interfaces are set the the correct
netmask, and ip classless is set on both routers (10.0.0.1 & 10.0.0.6)

A bainaid is currently in place which solves the problem.  On the
individual proxy machines i have set a ping to ping itself eg I have ping
10.0.0.14 on proxy1 and ping 10.0.0.15 on proxy 2.

Any help ideas to solve this would be much appreciated.

Note 10.0.0.x is not the actual network used.

Regards,


Stavros Patiniotis
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