home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.dcom.sys.cisco
- Path: sparky!uunet!boulder!recnews
- From: Paul Traina <pst@CISCO.com>
- Subject: Re: Problems using unnumbered serial interfaces in 9.0(1)
- In-Reply-To: Your message of "12 Aug 92 18:09:29."
- <9208122209.AA5f0@GARFY.nil.yu>
- Message-ID: <9208121631.AA08476@wolf.cisco.com>
- Sender: news@colorado.edu
- Date: 12 Aug 92 09:31:58 PDT
- X-From: <pst@cisco.com>
- Lines: 61
-
- -Excellent- diagnosis. I rarely see a customer report as detailed as the one
- you submitted. You're absolutely correct. The split horizon logic put into
- 8.3(3) and 9.0(1) broke routing updates exactly as you specified.
-
- I wrote a fix for it (CSCdi06205) a couple of weeks ago, but it hasn't been
- included in any production release yet.
-
- Please contact a CE and ask them to keep an eye on this bug and ship you
- a copy of the next beta-release with this fix in it. I'm surprised that
- this hasn't made it into 8.3 and 9.0 yet.
-
- Regards,
- Paul
-
- From: Ivan Pepelnjak <Ivan.Pepelnjak@nil.yu>
- Subject: Problems using unnumbered serial interfaces in 9.0(1)
- Hello !
-
- I have encountered a serious IP routing problem when using unnumbered
- serial interfaces with RIP in release 9.0(1). Consider the following
- simple network :
-
- network A (192.84.104.0) network B (192.84.105.0)
- =========================== ============================
- ! !
- +---------+ serial link +---------+
- | IGS/R | <---------------------> | IGS/R |
- +---------+ +---------+
-
- With SW release 8.3 all you have to do was a simple setup similar to
-
- interface ether 0
- ip address 192.84.104.10
- interface serial 0
- ip unnumbered ether 0
- router rip
- network 192.84.104.0
- network 192.84.105.0
-
- However, when using the same configuration with release 9.0(1), the
- Ethernet network is not announced across the serial link. Evidently
- the router thinks that the serial interface belongs to the same network
- and thanks to new split-horizon logic does not announce network A or B
- across the serial line (debug ip-rip output shows "RIP update suppressed").
-
- Turning the split-horizon off helps a bit, but not when you are in
- mixed versions environment (a mixture of 8.3 and 9.0). Numbering the
- serial line with IP addresses from yet another class-C network solves
- the problem (technically but surely not organisationally).
-
- Has anybody encountered anything like that with 9.0(1) or am I doing
- something wrong ?
-
- Ivan
-
- Ivan Pepelnjak Phone : +38 61 372-713
- Technical manager FAX: +38 61 372-809
- NIL, Systems integration and Consulting E-Mail: pipi@nil.yu
- >>
- Ljubljana, Slovenia
-
-