On Tue, Mar 18, 2008 at 02:40:29PM +0200, Christian Vogt <[EMAIL PROTECTED]> wrote a message of 45 lines which said:
> If the key is an EID, the query will be for reverse DNS. Does this > answer your question? Yes. So, if you want to know the locator for the EID ABC::1, assuming someone delegated sixone.arpa, the first Sixone router would query 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.a.0.sixone.arpa. Correct? > The lookup key is always for a specific host, i.e., either a domain > name or an address. The MAP resource records themselves may contain > aggregated information, however. They include (in the RDATA field) > a pair of edge address prefix and transit address prefix -- although > prefix lengths may be 32 bits (IPv4) or 128 bits (IPv6) to enable > non-aggregated, per-host mappings. I am not sure how it could work. Another solution would be to use aggregation and DNS wildcards. Assuming that ABC::/56 is handled by the transit address (the address of the ETR in LISP) 1000::1, just add in the DNS zone file: *.0.0.0.0.0.0.0.0.0.0.c.b.a.0.sixone.arpa. MAP 1000::1 and that's all, requests for the MAP of ABC::1, ABC::42:1, ABC::34:56:CAFE:6 would all yield 1000::1. [Limitation: the resolution is one digit, that is 4 bits. So, you can handle /56 prefixes but not /55.] An ANSWER=0 (no MAP records) could mean that the EID is not an EID but a RLOC. > Depending on the DNS server implementation, the owner name may be > filled in dynamically given the lookup key in a DNS query, or MAP > resource records must be replicated for each possible owner name. This is also possible. > The latter can typically be accomplished via macros, which many DNS > servers provide to generate resource records for a range of owner > names. You do not need DNS server support, the zone files can be preprocessed by the macro system before being giving out to the DNS server. -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
