Hello All, I think I see my error.
::/0 is going to cover all addresses that aren't covered explicitly by some other prefix in the Default Policy Table, right? Thanks, Tammy -----Original Message----- From: Leino, Tammy Sent: Thursday, October 25, 2007 3:36 PM To: ipv6@ietf.org Subject: RFC 3484 Question Hello All, I have a question regarding two examples in section 10.2 of RFC 3484 for default destination address selection. The Default Policy Table is defined as: Prefix Precedence Label -------------------------------- ::1/128 50 0 ::/0 40 1 2002::/16 30 2 ::/96 20 3 ::ffff:0:0/96 10 4 I have questions about the third, and last examples shown based on the Default Policy Table contents. Third Example: Candidate Source Addresses: 2001::2 or fe80::1 or 10.1.2.4 Destination Address List: 2001::1 or 10.1.2.3 Result: 2001::1 (src 2001::2) then 10.1.2.3 (src 10.1.2.4) (prefer higher precedence) The outcome shows that 2001::1 is sorted as the "best" address because of higher precedence, but I do not see how the Default Policy Table would return a matching prefix for this address. Can someone please explain how the Default Policy Table returns a precedence value for the addresses 2001::1 and 2001::2. Last Example: Candidate Source Addresses: 2002:836b:4179::2 or 2001::2 or fe80::2 Destination Address List: 2002:836b:4179::1 or 2001::1 Result: 2001::1 (src 2001::2) then 2002:836b:4179::1 (src 2002:836b:4179::2) (prefer higher precedence) Label is checked in Rule #5, and precedence is checked in Rule #6. Since 2002:836b:4179::1 would be the only address with a matching label, I do not see why we go on to check the precedence. I suppose it has something to do with that 2001 address that I do not understand from my previous question. Any clarification you can add would be much appreciated. Best Regards, Tammy Leino -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
