Dear Bharat, In the scenario that you mentioned RIP packet will have two RTEs after the RIP header, first one will be authentication RTE and second one will be FULL table request RTE with address family identifier as 0. This may be followed by authentication trailer depending on the authentication scheme selected.
RFC section 3.9.1 first states the general format of RIP Version 2 request message. Even though authentication is present, there is only one RTE (full table RTE) other than authentication as authentication RTE doesn't convey routing information. Hope this helps. Note: I think this is not correct forum to discuss this issue. I am not sure where you can post it as RIP mailing list is not active anymore. Regards, -Gopakumar -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bharat Joshi Sent: Tuesday, December 25, 2012 4:02 PM To: [email protected] Cc: Bharat Joshi Subject: A query on RIPv2 Hi All, I came across some text in RFC 2453 (RIPv2) which has confused me. It would be great if someone can clarify this for me. I searched the net and looked through the errata but could not find any reference to this. In section 3.9.1 of RFC 2453 (http://tools.ietf.org/html/rfc2453#section-3.9.1), in second para, following text is available: <quote> There is one special case. If there is exactly one entry in the request, and it has an address family identifier of zero and a metric of infinity (i.e., 16), then this is a request to send the entire routing table. <unquote> In section 4.1 of same RFC (http://tools.ietf.org/html/rfc2453#section-4.1), in first para, following text is available: <quote> If the Address Family Identifier of the first (and only the first) entry in the message is 0xFFFF, then the remainder of the entry contains the authentication. <unquote> Now what has confused me is that if a router is configured to use authentication, how should its 'request' message for full routing table look? Should it go without authentication information or with authentication information? If it goes with authentication information then it is not conforming to the statement of 3.9.1. If it goes without authentication information then it is not conforming to the user configuration and also there may be security issues. Regards, Bharat PS: I am currently not subscribed to RTG working group mailing list, so please reply all so that I can get your reply. **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS*** _______________________________________________ rtgwg mailing list [email protected] https://www.ietf.org/mailman/listinfo/rtgwg _______________________________________________ rtgwg mailing list [email protected] https://www.ietf.org/mailman/listinfo/rtgwg
