Re: [Time] MEP and maintenance domain boundary
Huub van Helvoort <huubatwork@gmail.com> Mon, 30 June 2014 12:58 UTC
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Date: Mon, 30 Jun 2014 14:58:21 +0200
From: Huub van Helvoort <huubatwork@gmail.com>
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Subject: Re: [Time] MEP and maintenance domain boundary
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You wrote:
Unfortunately MPLS-TP has only one MEL, fixed at "7".Hi, Greg:
Thanks for your review to problem statement draft.
http://tools.ietf.org/html/draft-ww-opsawg-multi-layer-oam-01" rel="nofollow">http://tools.ietf.org/html/draft-ww-opsawg-multi-layer-oam-01
Section 4 gives an architecture overview of management plane OAM,
You comment on the following quoted sentence
“MEP is a maintenance functional entity that is implemented into
network entity at the maintenance domain boundary
”
as “Not necessarily, e.g. MEP at Level < 7 in Ethernet Service OAM as CFM or Y.1731”.
First of all you have to correct the expansion of MEP and MIP:
Are you saying MEP can be placed either at the maintenance domain boundary or within maintenance domain?
MEP = Maintenance entity End Point
MIP = Maintenance entity Intermediate Point.
MEPs and MIPs that belong to the same Maintenance Entity (ME) are not
aware of any MEPs or MIPs outside the ME they belong to.
A Maintenance Entity can be any path, tunnel or section in the
network.
So it can exist between domain boundaries (NNIs) but also inside
a domain, or across multiple domains (end-to-end ME).
In section 4 I notice:
MEP is a maintenance functional entity that is implemented into a Network Element either at the maintenance domain boundary or in the maintenance domain and can generate, send and receive OAM packets. What is the difference between generate and send OAM packets? MIP is a maintenance functional entity that is implemented into a Network Element in the maintenance domain and can forward OAM packets. A MIP can also respond to OAM messages sent by the source MEP. Either MEP or MIP may be at different layer and use various different encapsulating protocols. This is confusing, as I explained above. MEPs and MIPs can exist in different layers/technologies. However in the same layer ME MIPs cannot exist without MEPs. MEPs and MIPs in the same ME in a layer are not aware of MEPs and MIPs other ME in the same layer, nor in other layers. Best regards, Huub.
-- ***************************************************************** 请记住,你是独一无二的,就像其他每一个人一样
- [Time] MEP and maintenance domain boundary Qin Wu
- Re: [Time] MEP and maintenance domain boundary Huub van Helvoort
- Re: [Time] MEP and maintenance domain boundary Qin Wu
- Re: [Time] MEP and maintenance domain boundary Huub van Helvoort
- Re: [Time] MEP and maintenance domain boundary Yuji Tochio
- Re: [Time] MEP and maintenance domain boundary Qin Wu
- Re: [Time] MEP and maintenance domain boundary Yuji Tochio
- Re: [Time] MEP and maintenance domain boundary Qin Wu
- Re: [Time] MEP and maintenance domain boundary Yuji Tochio
- Re: [Time] MEP and maintenance domain boundary Qin Wu