Re: M2PA questions on synchronization and message handling
"Brian F. G. Bidulock" <[email protected]>
| Newsgroups | gmane.ietf.sigtran |
|---|---|
| Organization | http://www.openss7.org/ |
| Message-ID | <[email protected]> |
Dario, Brian F. G. Bidulock wrote: (Thu, 20 Dec 2007 10:45:12) > > > > not if they are connected: > > > > 1. message is received with invalid BSN. This message wil be discarded > > 2. User Data message is received with FSN=x, valid, but it should be > > discarded according to Q.703 statement above. > > 3. User Data message is received with FSN=x+1. This is unexpected FSN and > > the message will be discarded....and so on. > > > > finally ack timer will expire and the link will go Out of Service. > > The peer violated the protocol at 1. (The rest is just one possible > result of that.) You should not find it surprising that signalling > links fail to operate and eventually find themselves in the out-of- > service state when one side refuses to follow the protocol. See also test case 3.8.10-1 in draft-bidulock-sigtran-m2pa-test-08.txt and section 2.2 of draft-bidulock-sigtran-ig-01.txt. --brian -- Brian F. G. Bidulock [email protected] http://www.openss7.org/