Re: single/double exchange mode doubt
"Ankit Kumar Sharma" <[email protected]>
| Newsgroups | gmane.ietf.sigtran |
|---|---|
| Message-ID | <[email protected]> |
Brian, On 7/17/07, Brian F. G. Bidulock <[email protected]> wrote: > > Ankit, > > Ankit Kumar Sharma wrote: (Tue, 17 Jul 2007 11:31:59) > > > > Where have I written that ASP-Active is sent by IPSP-A for rc=y? > > For rc=y, ASP-Active is sent from IPSP-1 towards IPSP-A(Please > see > > statement (3) above). > > Following diagram gives a much clearer view of this scenario. > > +----+ +----+ > > |AS-1 | |AS-A | > > |rc=x | |rc=x | > > +----* *----+ > > \\ // > > \\ // > > \\ // > > *------+ +------+/ > > |IPSP-1+--------------+IPSP-A| > > /*------+ +------+ > > // > > // > > +----* > > |AS-2 | > > |rc=y | > > +-----+ > > > > In SE mode an AS exists at both ends of the association or > not at all. rc=x is valid in you diagram by rc=y is not. > > If an AS with rc=y does not exist at IPSP-A, then it will > not be sending ASP-Active(rc=y) to IPSP-1. > > Put an AS-B(rc=y) at IPSP-A and your problems vanish. I know this, please check one of my previous responses. I have copied that below for your convenience: " Corresponding to rc=y, I need to send ASP-Active towards IPSP-A. Since there is no local AS with rc=y at IPSP-A, it would return with error code "invalid RC", unless there is some way to instruct IPSP-A to behave as a double-exchange IPSP for rc=y. Although I could do the workaround by adding a dummy AS with rc=y at IPSP-A but that solution is irrational and not so clean. " Whole point of this discussion is, why exchange mode(Double/Single) is a property of IPSP, but not AS? --brian > > -- > Brian F. G. Bidulock > [email protected] > http://www.openss7.org/ Cheers, Ankit _______________________________________________ Sigtran mailing list [email protected] https://www1.ietf.org/mailman/listinfo/sigtran