[PWE3] RE: Concern with draft-ietf-pwe3-enet-mib-10

Ken,
Please see inside. 

-----Original Message-----
From: Ken Young [mailto:KenY@gridpointsystems.com] 
Sent: Wednesday, March 21, 2007 12:07 AM
To: pwe3@ietf.org
Cc: Lyndon Ong; David Zelig; tnadeau@cisco.com; Brian Smith; Chris
Barrett
Subject: Concern with draft-ietf-pwe3-enet-mib-10

All,

Since the PW-ENET MIB is heading for last call, I reviewed the MIB
today.  I realised that the MIB does not comply to the MEF's view of
Ethernet E-line services.  For more information on this definition,
please refer to: 

http://www.metroethernetforum.org/PDFs/Standards/Overview_of_MEF_6_and_1
0.ppt
<https://webaccess.hostedmail.net/exchweb/bin/redir.asp?URL=http://www.m
etroethernetforum.org/PDFs/Standards/Overview_of_MEF_6_and_10.ppt> 

I realise that this was not the stated intention of the MIB but I would
like to see the gaps closed.  Note that I believe this gap is small.  We
only need to address 3 issues:

1/  defining a default VLAN for the untagged and priority packets (this
may already be possible) 
[DZ] Assigning a PW for the default VLAN and priority tagged packets can
be supported by the PW-ENET-STD-MIB. 

2/  define how L2CP protocols are handled (right now they are
tunnelled).  We need to add the capability to discard L2CP packets.  I
believe this is desirable on a per L2CP basis but I need to verify this.
[DZ] I think that this part of the functionality is part of the NSP
function. In addition, the MEF may change the specifications at any
time, and there is no mutual process to synchronize the specifications.

3/  define a way to map p-bit / vlans to a PW.  The rest are discarded.
[DZ] I believe that this functionality is out of the scope of the PWE3
group (and as such from PWE3 MIB modules). Note also that traffic
descriptors at the PW level (as exist in the MEF) are not defined as QOS
issues are not defined within the group.

I need to review this in more detail to make sure these are the only
gaps.  However, before I went through this effort, I wanted to bring
this issue to the list.

Do we see MEF compliance as an objective of the PW-ENET service?
[DZ] There is no mutual process between the MEF and IETF to adjust the
specifications. The MIB modules are derived from IETF specifications. If
the specifications will changed, than we can adapt the MIB modules.

Thanks
David

Please let me know,
Ken

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