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- Newsgroups: comp.dcom.sys.cisco
- Path: sparky!uunet!boulder!recnews
- From: rcraig@cisco.com (Robert Craig)
- Subject: Re: Routing Problem ?
- X-Sender: rcraig@diablo.cisco.com (Unverified)
- Message-ID: <728273246.6361@news.Colorado.EDU>
- Sender: news
- Date: 28 Jan 1993 15:58:37 -0500
- Approved: news
- X-Note1: message-id generated by recnews
- X-Note2: mail msgid was <199301282100.AA02902@spot.Colorado.EDU>
- Lines: 36
-
- At 10:50 1/27/93 +0000, Glyn Simpson wrote:
- >I think this is more of a software problem rather than a routing problem.
- >I'm running 8.2(7) on out Cisco AGS+/3 quite successfully until a few
- >days ago. During that time, we lost our X.25 link to the outside world,
- >through which we encapsulate our IP packets. When the line was down, a
- >host on our local network broadcast to fact that it knew how to get to
- >the route 0.0.0.0 (ie the default) in 2 hops (yes, one hop to itself,
- >and one back to the cisco) - hence a routing loop was formed.
- >
- >This isnt the problem though. The problem then occurred in that the
- >Cisco changed its configuration to point to this host as the default
- >route, and subsequently, when the X.25 switch was brought back up,
- >routing was mangled.
- >
-
- You need to defend yourself from other routers, either through the use of
- administrative distance or an input filter on RIP (don't accept the default
- route from anyone).
-
- >Is this a known problem, and do i need to upgrade software (i think one
- >is on the cards when we *finally* get the FDDI card we've been promised
- >for months, and has not yet appeared.
- >
- >Thanks in advance.
- >
- >--
- >Glyn Simpson, Systems Officer, // Voice: +44 (0) 21 414 6575
- >University of Birmingham // Fax: +44 (0) 21 414 3952
- >Email: G.Simpson@bham.ac.uk // NIC Handle: GS56
-
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