Cisco ONS 15454 SDH Specifications download pdf (Page 215)

5-25

Cisco ONS 15454 SDH Installation and Operations Guide, R3.3

May 2002

Chapter 5 SDH Topologies

Creating MS-SPRings

5.4.4 Setting Up MS-SPRings

To set up an MS-SPRing on the ONS 15454 SDH, you perform six basic procedures:

Step 1 Complete the “Install the MS-SPRing Trunk Cards” procedure on page 5-25.

Step 2 Complete the “Create the MS-SPRing DCC Terminations” procedure on page 5-27.

Step 3 Set up MS-SPRing timing. See the “Set up External, Line, or Mixed Timing for the ONS 15454 SDH”

procedure on page 3-19 or the “Set Up Internal Timing for the ONS 15454 SDH” procedure on

page 3-22.

Step 4 Complete the “Set Card Ports In Service” procedure on page 5-60.

Step 5 If an MS-SPRing span passes through equipment that cannot transparently transport the K3 byte, remap

the MS-SPRing extension byte on the trunk cards on each end of the span. See the “Remap the K3 Byte”

procedure on page 5-28.

Step 6 Complete the “Provision the MS-SPRing” procedure on page 5-29.

Procedure: Install the MS-SPRing Trunk Cards

Caution Always wear an authorized electrostatic discharge wrist band when removing or installing ONS

15454 SDH cards.

Step 1 Install the STM-4, STM-16, or STM-64 cards that will serve as the MS-SPRing trunk cards. You can

install the STM-4 and STM-16 cards in slots 1—6 and 12—17. The STM-64 card can only be installed

in Slots 5, 6, 12, or 13.

Step 2 Allow the cards to boot. For more information about installing cards, see “Card Installation” section on

page 1-27.

Step 3 Attach the fiber to the east and west MS-SPRing ports at each node.

• To avoid errors, make the west port the farthest slot to the left and the east port the farthest slot to

the right.

• Plug fiber from a west port at one node into the east port on the adjacent node. Figure 5-21 shows

fiber connections for a two-fiber MS-SPRing with trunk cards in Slot 5 (west) and Slot 12 (east).

• Plug fiber from the transmit (Tx) connector of an STM-N card at one node into the receive (Rx)

connector of an STM-N card at the adjacent node. The card displays an SF LED if Tx and Rx fibers

are mismatched after the DCCs are created and the ports are in service.

Purpose To set up an MS-SPRing on the ONS 15454 SDH, you must first install the

MS-SPRing trunk cards.

Prerequisite Procedures All STM-N cards that will be used in the MS-SPRing.

Onsite/Remote Onsite

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Cisco ONS 15454 SDH Specifications Page 215