Clarification regarding the IPSP behavior for ASPTM messages without RC
Vaibhav Banga <[email protected]> Tue, 12 Mar 2013 15:06:00 +0530
| Newsgroups | gmane.ietf.sigtran |
|---|---|
| Message-ID | <CAL=vkEZAki8Ws+Ba1LGGd6kd40=up-4WxVSeDfhqdNVzQ4AkMA@mail.gmail.com> |
Hi All,
I would request you to clarify regarding the IPSP D.E mode behavior for
ASPTM messages without RC.
According to M3UA RFC 4666 section 4.3.1 last paragraph :
“ASPTM messages. When sending ASPTM messages to activate/deactivate
all the traffic independently of routing keys by not specifying any
RC, a single exchange could be sufficient.”
A single exchange of ASPTM messages without RC sufficient to
activate/deactivate the traffic. Whereas the diagram in section 5.6.2.
double exchange it looks, even if RC is optional, double exchange of ASPAC
messages are required.
IPSP-A IPSP-B
| |
|<-------------ASP Up------------|
|-----------ASP Up Ack---------->|
| |
|-------------ASP Up------------>| (optional)
|<----------ASP Up Ack-----------| (optional)
| |
|<------- ASP Active(RCb)--------| RC: Routing Context
|-----ASP Active Ack (RCb)------>| (optional)
| |
|------- ASP Active(RCa)-------->| RC: Routing Context
|<-----ASP Active Ack (RCa)------| (optional)
| |
|<========= DATA (RCa) =========|
|========== DATA (RCb) ========>|
| |
|<-----ASP Inactive (RCb)--------| RC: Routing Context
|----ASP Inactive Ack (RCb)----->|
| |
|------ASP Inactive (RCa)------->| RC: Routing Context
|<----ASP Inactive Ack (RCa)-----|
| |
|<-----------ASP Down------------|
|---------ASP Down Ack---------->|
| |
|------------ASP Down----------->| (optional)
|<--------ASP Down Ack-----------| (optional)
| |
Both section are seems to be contradictory. I would request you to clarify
the behavior for ASPAC/ASPIA messages without RC for IPSP Double exchange
mode. Whether single exchange of ASPTM messages or double exchange of ASPTM
messages are required to acivate/deactivate the traffic with out RC.
-
Thanks and kind Regards,
Vaibhav Banga
Software Engineer,
ARICENT TECHNOLOGIES
Gurgaon, Ph.No. 09654714588
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