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- Newsgroups: comp.dcom.sys.cisco
- Path: sparky!uunet!think.com!ames!ncar!csn!boulder!recnews
- From: Allan Leinwand <leinwand@cisco.com>
- Subject: Re: Does the Cisco cache Vines address???
- In-Reply-To: <C03o7w.G4v@inews.Intel.COM>; from "Sunil Kishen" at Dec 31, 92 1:31 am
- Message-ID: <725787489.1104@news.Colorado.EDU>
- Sender: news
- Date: 30 Dec 92 20:57:51 PST
- Approved: news
- X-Mailer: ELM [version 2.3 PL11]
- X-Note1: message-id generated by recnews
- X-Note2: mail msgid was <9212310457.AA22319@mead.cisco.com>
- Lines: 51
-
-
- >Now if we replace the MEC6 with a new MEC6 then the E0 MAC address would
- >change. The
- >Cisco should ideally change its Vines address to 3000xxxx.1 (where xxxx
- >is the last 4 octets
- >of the new MAC address of E0).
- >
- >Under 9.0(2) GS3BFx this is not the case! The vines address did not
- >change. Upon disabling
- >vines routing and restarting it again it still remained the same (as the
- >old vines addr.).
- >
- >This bug led to a situation where two Ciscos had the same vines addr.
- >(use old mec6 in a
- >new router and start vines routing)!!.
-
- Hello Sunil,
-
- The problem is most likely caused because the old vines server
- address is stored in NVRAM of the router. You see, when you first
- configured vines routing and wrote the configuration to NVRAM (the
- 'write mem' command) it stored the command:
-
- vines routing <server-address>
-
- The <server-address> argument above is optional, and if not
- specified is computed by using the algorithm you described above. If
- the server-address is specified, the router will use this regardless
- of the MAC on the first address interface. The router will save the
- current server-address in NVRAM for future use. We have found that
- users often want to keep the same server address on the router even if
- an interface changes -- this helps keep the network up without any
- interruption.
-
- This is why when you swapped interfaces the server address did not
- change. So, to resolve your problem, you simply need to configure the
- router with the above vines routing command and specify the new
- <server-address>:
-
- vines routing 3000xxxx.1
-
- Then, write this configuration to NVRAM for storage using the
- 'write mem' command.
-
- --
- Thanks,
-
- Allan Leinwand
- cisco Systems
- (415) 688-7653
- leinwand@cisco.com
-