Re: [EFM] Question regarding OAM in 802.3ah D1.3
There is only one answer to this that can be within the scope of
802.3, that is that the OAMP PDU terminates and originates at what you
have labeled the "ONU". All other transport of this information
is in-band and is in the domain of systems management. The purpose of OAM
is (1) to extend the systems management of the box that you have labeled
ONU to the box you have labeled OLT without requiring a full SNMP agent
in the box you have labeled OLT and (2) to be able to (remotely) manage
what you have labeled:
---Ethernet---- ONU 1
as a single entity.
I hope this helps.
At 11:12 AM 2/10/2003 -0800, Shahram Davari wrote:
802.3ah section 57 says that the OAM defined is
for single link (or emulated link), and should not be forwarded by
My question is, in case of Ethernet over SONET
transport (GFP + Virtual concatenation), should the OAMPDU be terminated
at the EOS device or it should be transparently transported?
Consider this example:
OLT1 -------------- ONU 1------------------ ONU
2 ------------ OLT 2
Assume OLT1 and OLT2 are the customer
equipments and ONU1 and ONU2 are provider
transport equipments that transport Ethernet over SONET (but don't do any
In this case should ONU1 terminate OAMPDUs from
OLT1 or it should sent them transparently to OLT2?
In other words is OLT1--ONU1 considered a single link? what about ONU1 to
ONU2, is this also a link?
Thanks in advance,
Senior Product Research Engineer
R&D Research Ottawa
Phone: (613) 271-4018
Fax: (613) 271-6468