CANOGA PERKINS 9145EMP NID Software Version 4.0 - Manual (Page 147)

9145EMP NID Software User’s Manual Service OAM
Service OAM
132
Port ID TLVs are optionally used for Linktrace reply messages, to identify a particular port on a
given system. Port ID TLVs received from the far end are displayed in the Linktrace monitoring
screen (see section 11.6.6.2).
11.1.5 Typical Service OAM Deployment and Applications
The application shown in Figure 11-2 is an example of a service provider network consisting of
two Metro Ethernet Networks (MEN), MENA and MENB, interconnected at an NNI interface. The
9145EMP, located in the customer premises, provides the demarcation between the customer
and the service provider networks. When SOAM fault monitoring is used, the network can be
portioned into multiple hierarchical domains that allow better isolation of faults in the network.
Every domain has some administrative boundaries.
For example the topology described in Figure 11-2 contains four hierarchical domains. At the
lowest level (MD1) three distinct domains are monitoring point-to-point UNI and NNI links. Two
Level 4 domains (MD4), MEN A and MEN B, are monitoring the end-to-end connectivity inside
each Metro Ethernet Network in the topology. The service provider monitors its end-to-end
service via a level 5 domain (MD5), while the subscriber uses a level 6 domain for customer-level
monitoring.
The SOAM levels used by different organizations are decided based on administrative
recommendations.
Figure 11-2 Typical Service OAM deployment and applications