Hi Albert, ³Map Register TTL² in the referenced paragraph is indeed the TTL for which a Map Register stays valid in a Map Server. Suggested time in the RFC for periodic Map Registers is 1 minute. And MS will expire the registration after 3 minutes if it does not receive a renewal. So this TTL in RTR should be set no larger than 3 minutes, and no smaller than 1 minute. Unfortunately NAPT devices don¹t have a standard TTL for expiring their address associations; some use 2 minutes as the threshold. So the 3 minute recommendation for expiring a Map Register seems suitable here.
Hope this clarifies it. Best, Vina On 11/6/17, 1:01 AM, "lisp on behalf of Albert López" <[email protected] on behalf of [email protected]> wrote: >In that case, I think that It would be better if the validation time / >expiration time of the locator associated with the ECM-ed Map Register & >ECM-ed Map Notify is related with the periodic time of sending ECM-ed >Map Registers. >Usually a hole in the nat box is less than two minutes so we send >periodic ECM Mag register to maintain this hole opened apart from >maintaining the status in the Map Server. If we use the TTL of the >record to maintain an entry in the Map Cacahe of the RTR, it is possible >we maintain an entry which is no longer valid or send packets to an >invalid rloc. What do you think? > >Regards > >Albert > >El 03/11/17 a les 18:38, Dino Farinacci ha escrit: >> The TTL in the Map-Register is the TTL returned in Map-Replies. So it >>is the expiry time for a map-cache entry. Note it is the ³Record TTL² in >>the EID-record which both appear in Map-Register and Map-Reply messages. >> >> Dino >> >>> On Nov 3, 2017, at 1:35 AM, Albert López <[email protected]> wrote: >>> >>> Dear all, >>> >>> In section 5.3 of the draft draft-ermagan-lisp-nat-traversal which >>>describe the RTR processing, it says that when the RTR receive and >>>ECM-ed Map Notify, once it is validated, it changes the state of the >>>associated map-cache entry to verified for the duration of the Map >>>Register TTL. What does it mean by Map Register TTL? it means the TTL >>>of the record of the Map Register or it is the same concept of the Map >>>Register TTL of the Map Server which is 3 minutes? If I understand >>>correctly, if we don't receive more Encap Map Register / Map Notify to >>>renew this verified period, the map-cache entry of the RTR expires, at >>>least the locator of the map-cache entry associated with the Encap Map >>>register. >>> >>> "Once the authenticity of the message is verified, >>> RTR can confirm that the Map-Register message for the ETR with the >>> matching xTR-ID was accepted by the Map-Server. At this point the >>> RTR can change the state of the associated map-cache entry to >>> verified for the duration of the Map-Register TTL" >>> >>> Thank you in advance. >>> >>> Albert López >>> >>> >>> _______________________________________________ >>> lisp mailing list >>> [email protected] >>> https://www.ietf.org/mailman/listinfo/lisp > >_______________________________________________ >lisp mailing list >[email protected] >https://www.ietf.org/mailman/listinfo/lisp _______________________________________________ lisp mailing list [email protected] https://www.ietf.org/mailman/listinfo/lisp
