Common Framework
for OAM
IEEE 802.1 Meeting San Diego
July 16th-20th, 2012
by
Tissa Senevirathne
Donald Eastlake 3rd
Objective
Explore complementary OAM model
between IEEE 802.1 and IETF/TRILL
 Explore Leveraging Existing OAM
Framework for the purpose

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OAM Model

Goal of OAM
◦ Complement and coexist rather than re-invent
and compete

OAM Framework
◦ Common OAM frame structure
◦ Common OAM concepts/semantics/Functional
elements
◦ Common OAM messaging format
◦ This allow us to reuse the same framework
 Faster Time to Market
 Uniform user experience
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Scope of TRILL OAM vs 802.1ag
(CFM)
TRILL Network
802.1 LAN
802.1 LAN
TRILL OAM
802.1ag
MEP
MIP
TRILL Switch
802.1 Bridge
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Scope TRILL OAM vs 802.1ag (CFM)
Application
Media Layers
OSI Model
Host Layers
Presentation
Session
Transport
(end-end)
802.1ag
Network
TRILL OAM
Link
802.1ag/802
.3ah
Physical
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Common OAM Frame Structure
• OAM Message structures are similar between many
technologies
• Most OAM functions are common across technologies
• Yet, there are no established common OAM framework
Encapsulation
Header
1. Technology
Dependent
2. Addresses MEP
(end Points)
3. Drives Forwarding
decisions
Flow Entropy
1. Technology
Dependent
2. Influence
Forwarding
decisions
Message Channel
1. Drives OAM
Functions
2. SHOULD be
common across
Technologies (SDO)
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Common OAM
Concepts/Functional Elements

Common OAM Functional elements
◦
◦
◦
◦
Maintenance
Maintenance
Maintenance
Maintenance
Domains
Associations (MA)
End Points (MEP)
Intermediate Points (MIP)
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Common OAM Message Channel

Utilize 802.1ag Messaging
◦ Re-use TLV and opcodes where commonality
exist
◦ IETF/TRILL specific opcodes for Technology
specific functions.
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Next Steps
Your comment/Feedback on the general
direction of having a common OAM
framework between IEEE and TRILL/IETF
 If we do agree this is the right thing to do

◦ Then how can we collaborate and workout the
details ?
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References

TRILL OAM Requirements
(WG document)
◦ draft-ietf-trill-oam-req-00

TRILL OAM Framework
(Individual submission)
◦ draft-salam-trill-oam-framework-00

Use of 802.1ag for TRILL
(Individual submission)
◦ draft-tissa-trill-8021ag-00
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