Thank you so much Jonathon. This is exactly what I what I was searching for. Oh and yes I should have mentioned I'd like to do the Y.1731 and measure the delay and delay variance
Just yesterday evening I found a great article about how ATT did theirs active measurements though for IP - wondering if I could do the same for my Y.1731 They used dedicated servers and I'll be running this form the routers ME3600X and CX and ASR9K so I'm a bit worried about the scaling of the whole thing ATT basically used two probes and each 24-hour day is divided into 96 test cycles of 15 minutes A Poisson probe sequence of duration equal to the test cycle characteristics: - Poisson distribution with average interarrival time of 3.3 s - Packet size of 278 bytes, including headers - UDP protocol Two periodic probe sequences in every test characteristics: - Interval of 20 ms between successive packets (or 50 packets/s) - 1 min duration - Random start time within the 15 min cycle - Packet size of 60 bytes (including headers) - UDP protocol adam -----Original Message----- From: Jonathon Exley [mailto:jonathon.ex...@kordia.co.nz] Sent: Wednesday, September 26, 2012 6:34 PM To: nanog@nanog.org Subject: RE: Ethernet OAM BCPs Please are there any yet??? The ITU recommend the following levels: 5,6,7 = Customer 3,4 = Provider 1,2 = Operator 0 = Local segment I don't know if there are any rules of thumb for the CCM interval - faster is more sensitive & unstable, slow is sluggish but stable. The spec allows between 3.33 ms and 10 minutes in 7 steps, with 1s being the midpoint. So we use 1s intervals. I'm not sure if the other parameters you mention are configurable for CCM. I think the packet has a constant size. Are you wanting to also do Y.1731 performance management? Jonathon > -----Original Message----- > From: Adam Vitkovsky [mailto:adam.vitkov...@swan.sk] > Sent: Wednesday, 26 September 2012 9:29 p.m. > To: nanog@nanog.org > Subject: Ethernet OAM BCPs Please are there any yet??? > > Hi > Are there any best common practices for the CFM levels use Since my > pure Ethernet aggregation layers are small I believe I only need two > CFM levels I plan on using Level 5 between CPEs managed by us and > Level 4 between Aggregation devices -that's where MPLS PWs kicks in So > leaving Level 7 and Level 6 for customers and carrier-customers > respectfully -would this be enough please? > > I'm also interested on what's the rule of thumb for CCMs Frequency, > Number of Packets, Interpacket Interval, Packet Size and Lifetime for > the particular operation Thanks a lot for any inputs This email and attachments: are confidential; may be protected by privilege and copyright; if received in error may not be used, copied, or kept; are not guaranteed to be virus-free; may not express the views of Kordia(R); do not designate an information system; and do not give rise to any liability for Kordia(R).
