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).
