Sent: Monday, February 10, 2003 3:00
Subject: RE: [EFM] Question regarding
OAM in 802.3ah D1.3
question is somewhat out of scope wrt EFM, but the answer is yes, the EFM
OAMPDU flow must be terminated at the Provider Edge. Otherwise it would flow
through the provider's SONET network and get mixed in with a separate EFM
OAMPDU flow at the far end.
separate OAMPDU flow? do you mean from ONU2 to OLT2?
Note that you
have the terms ONU / OLT reversed.
ONU is the customer side?
"filter function" is being defined in the ITU-T SG15 / Q.12 work in draft
G.ethna (was G.etna) and in the OIF UNI v2.
I will have a look.
PE-PE, or SONET portion is not an EFM link, but rather a SONET path, which
has its own OAM (i.e. POH).
+1 613 765-2901
Sent: Monday, February 10, 2003 2:13
Subject: [EFM] Question regarding OAM
in 802.3ah D1.3
802.3ah section 57 says that the
OAM defined is for single link (or emulated link), and should not be
forwarded by bridges/switches.
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
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
In other words is OLT1--ONU1
considered a single link? what about ONU1 to ONU2, is this also a
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