Specifications

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Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 5 SONET Topologies
Bidirectional Line Switched Rings
5.2.9 Moving BLSR Trunk Cards
Caution Call the Technical Assistance Center (1-877-323-7368) before performing this procedure to ensure
that circuit and provisioning data is preserved.
Caution To change BLSR trunk cards, you will drop one node at a time from the current BLSR. This
procedure is service affecting during the time needed to complete the steps below. This applies to all
BLSR nodes where cards will change slots. Review all the steps before you proceed.
Figure 5-18 shows a four node OC-48 BLSR using trunk cards in Slots 6 and 12 at all four nodes. Trunk
cards will be moved at Node 4 from Slots 6 and 12 to Slots 5 and 6. To do this Node 4 is temporarily
removed from the active BLSR while the trunk cards are switched.
Figure 5-18 A four-node BLSR before a trunk card switch
Figure 5-19 shows the BLSR after the cards are switched.
67550
Node 1
Node 4
Node 3
Node 2
Slot 12 (East)
Slot 6 (West)
Slot 12 (East)
Slot 6 (West)
Slot 12 (East)
Slot 6 (West)
Slot 12 (East)
Slot 6 (West)