BLSR (Node View)

(ONS 15327, ONS 15454, and ONS 15600; node view only) Use the node view BLSR tab to view node BLSR information including the ring name, ring type (two-fiber or four-fiber), status, the node's BLSR ID, any active ring or span reversions, and the node's east and west spans. For ONS 15327, ONS 15454, and ONS 15600 nodes, you can create, delete, and edit two-fiber BLSRs. For ONS 15454 and ONS 15600 nodes, you can convert two-fiber BLSRs to four-fiber BLSRs and create four-fiber BLSRs.

Item

Description

Type

Displays the BLSR type, either two-fiber or four-fiber.

Rate

Displays the BLSR OC-N rate.

Ring Name

Displays the user-assigned BLSR name.

Node ID

Displays the node's BLSR identification number.

Ring Reversion

If checked, indicates that a ring reversion is active.

Span Reversion

If checked, indicates that a span reversion is active.

West Line

Displays the slot and card used for the BLSR west line.

East Line

Displays the slot and card used for the BLSR east line.

Create

Displays the BLSR Creation wizard, where you can create a new BLSR.

Delete

Deletes the highlighted BLSR.

Ring Map

Displays the BLSR ring map.

Squelch Table

Displays the BLSR squelch table. BLSR STS squelch tables show STSs that will be squelched for every isolated node. Squelching replaces traffic by inserting the appropriate alarm indication signal path (AIS-P); it prevents traffic misconnections. For an STS with a VT-access check mark, the AIS-P will be removed after 100 ms.

BLSR VT squelch tables only appear on the node that drops VTs from a BLSR and are used to perform VT-level squelching when a node is isolated. To view the BLSR VT squelch table, double-click the VT check mark in the BLSR STS Squelch Table window. VT squelching is supported on the ONS 15454 and the ONS 15327 platforms. The ONS 15600 platform does not support VT squelching; however, when an ONS 15454 and an ONS 15600 are in the same network, the ONS 15600 node allows the ONS 15454 node to carry VT circuits in a VT tunnel. The ONS 15600 performs 100-ms STS-level squelching for each VT-access STS at the switching node, in case of a node failure.

For more information about BLSR squelching, see Telcordia GR-1230.

Rip Table

Displays the ring interworking on protection (RIP) table for a BLSR. The secondary node maintains a RIP table that contains, for each incoming and outgoing inter-ring circuit carried on the protection bandwidth, the source or terminating node address and the primary node address.

Upgrade

(ONS 15454 and ONS 15600 only) If the highlighted BLSR is two-fiber, the button allows you to upgrade the BLSR to a four-fiber BLSR.

Apply

Applies changes made to the BLSR fields.

Reset

Cancels any BLSR subtab changes and returns the fields to their last-saved settings.

Help

Displays context-sensitive help.