[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
LMP Question: data link FSMs
I have a couple of problems with the Data Link FSMs in
draft-ietf-ccamp-lmp-01.txt. Event 14:evdcDown appears to be an
administrative action, as opposed to the failure event
13:evLocalizeFail. That being the case, event 14:evdcDown should only
transit from Up/Free to Down.
If this understanding is correct, suggested FSMs are included below. In
the passive case, transition 13 would need something like
ChannelFailNack to trigger it.
Figure 5 illustrates operation of the LMP active data link FSM in a
form of FSM state transition diagram.
+------+
+------------->| |
| +--------->| Down |<---------+
| | +----| |<-----+ |
| | | +------+ | |
| | |5b 3| ^ | |
| | | | |2,7 | |
| | | v | | |
| | | +------+ | |
| | | | |<-+ | |
| | | | Test | |11 | |
| | | | |--+ | |
| | | +------+ | |
| | | 5a| 3^ | |
| | | | | | |
| | | v | | |
| |2,12 | +---------+ | |
| | +-->| |14 | |
| | | Up/Free |----+ |
| +---------| | |
| +---------+ |
| 9| ^ |
| | | |
|10 v |10 |
+-----+ 2 +---------+ |
| |<--------| | 13 |
| Deg | |Up/Alloc |--------+
| |-------->| |
+-----+ 1 +---------+
Figure 5: Active LMP Data Link FSM
Figure 6 illustrates operation of the LMP passive data link FSM in a
form of FSM state transition diagram.
+------+
+------------->| |
| +---------->| Down |<---------+
| | +-----| |<----+ |
| | | +------+ | |
| | |5b 4| ^ | |
| | | | |2,8 | |
| | | v | | |
| | | +----------+ | |
| | | | PasvTest | | |
| | | +----------+ | |
| | | 6| 4^ | |
| | | | | |14 |
| | | v | | |
| |2,12 | +---------+ | |
| | +--->| Up/Free | | |
| | | |---+ |
| +----------| | |
| +---------+ |
| 9| ^ |
| | | |
|10 v |10 |
+-----+ +---------+ |
| | 2 | | 13 |
| Deg |<--------|Up/Alloc |--------+
| |-------->| |
+-----+ 1 +---------+
Figure 6: Passive LMP Data Link FSM
Regards,
George R. Young
edgeflow Inc.
329 March Rd., Kanata, ON, Canada, K2K 2E1
phone: +1 613-270-9279 Ext 287
fax: +1 613-270-9268