Traffic flow over oc-48 blsr, Traffic flow over oc-48 blsr 2-31 – Nortel Networks OPTera Metro 3500 User Manual
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Operation, administration, and maintenance (OAM) features 2-31
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
BLSR connection audit
If there is a discrepancy discovered in the connection audit, the "BLSR
Connection Audit Failed" alarm is raised against the pass-through node with
the inconsistency.
BLSR connection audit behaviour is as follows:
•
The BLSR connection audit feature resides on the NPx.
•
The audit period is user-provisionable.
•
If the audit cannot connect to a node’s SPx, the NPx will output the
autonomous message "BLSR Connection Audit could not connect to SP"
•
The audit will determine the correct End NE A and End NE Z information
of a path by looking at the Add/Drop points of the existing path.
•
When an audit is complete, the NPx will output the autonomous message
"BLSR Connection Audit completed".
•
The "BLSR Connection Audit Failed" alarm is cleared upon the next
successful BLSR connection audit.
•
The BLSR connection audit feature can only raise an alarm if the entire
path is provisioned. For partial paths (for example, during the provisioning
of a path), an alarm is not raised.
Traffic flow over OC-48 BLSR
All traffic types previously supported on the OPTera Metro 3500 shelf are
supported in Release 12.1.
OC-48 BLSR is supported on OPTera Metro 3500 shelves equipped with
VTX-series circuit packs in slots 13 and 14.
STS BLSR with VT assignment
In VT assigned BLSRs, users must provision STS connections at pass-through
nodes. This gives a number of distinct advantages to the user:
•
There are fewer connections for the user to manage.
•
There are fewer, therefore quicker, connection retrievals on pass-through
nodes.
Note: The number of fewer connections can be estimated to be:
16 nodes x 24 available STS/node x 1/2 used for passthrough x 28 VT/STS
= 5376 fewer possible connections.
•
The BLSR topology of OPTera Metro 3500 supports interoperability with
STS-based products like OPTera Connect HDX, OPTera Connect DX and
TransportNode OC-48 subtended BLSRs.