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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 13 Convert Network Configurations
NTP- D320 Convert an SNCP to a Two-Fiber MS-SPRing Automatically
Note Before beginning this procedure, optical transmit and receive levels should be in their acceptable range
as shown in Table 2-4 on page 2-17.
Note If overhead circuits exist on the network, an in-service topology upgrade is service affecting. The
overhead circuits will drop traffic and have a status of PARTIAL after the upgrade is complete.
Step 1 Complete the “DLP-D60 Log into CTC” task on page 17-49 at a node on the SNCP. If you are already
logged in, continue with Step 2.
Step 2 Complete the “DLP-D298 Check the Network for Alarms and Conditions” task on page 19-83.
Step 3 From the Tools menu, choose Topology Upgrade > Convert SNCP to MS-SPRing.
Step 4 In the SNCP to MS-SPRing Topology Conversion dialog box, set the MS-SPRing properties:
• Ring Type—(Display only) The default is two-fiber.
• Speed—Choose the MS-SPRing ring speed: STM-1, STM-16, or STM-64. The speed must match
the OC-N speed of the MS-SPRing trunk (span) cards.
Note If you are creating an STM-1 MS-SPRing and will eventually upgrade it to STM-16 or
STM-64, use the single-port STM-1 cards (OC12 IR/STM4 SH 1310, OC12 LR/STM4 SH
1310, or OC12 LR/STM4 LH 1550).
• Ring Name—Assign a ring name. The name can be from 1 to 6 characters in length. Any
alphanumeric string is permissible, and upper and lower case letters can be combined. Do not use
the character string “All” in either upper or lower case letters. This is a TL1 keyword and will be
rejected. Do not choose a name that is already assigned to another MS-SPRing.
• Reversion time—Set the amount of time that will pass before the traffic reverts to the original
working path following a ring switch. The default is 5 minutes. Ring reversions can be set to Never.
Step 5 Click Next. If the SNCP to MS-SPRing Topology Conversion dialog box with the network graphic
appears, go to Step 6.
If CTC determines that a MS-SPRing cannot be created, for example, not enough optical cards are
installed or it finds circuits with SNCP selectors, a “Cannot Create MS-SPRing” message appears. If this
occurs, complete the following steps:
a. Click OK.
b. In the Create MS-SPRing window, click Excluded Nodes. Review the information explaining why
the MS-SPRing could not be created, then click OK.
c. Depending on the problem, click Back to start over or click Cancel to cancel the operation.
d. Complete the “NTP-D40 Provision MS-SPRing Nodes” procedure on page 5-10, making sure all
steps are completed accurately, then start this procedure again.
Step 6 In the network graphic, double-click a MS-SPRing span line. If the span line is DCC connected to other
MS-SPRing cards that constitute a complete ring, the lines turn blue. If the lines do not form a complete
ring, double-click span lines until a complete ring is formed. Click Next.
Step 7 The next SNCP to MS-SPRing Topology Conversion page appears. The page states that the system is
about to force traffic to the shortest SNCP paths. Click Next to continue.
Step 8 Another page appears, stating that the force has been applied to the shortest SNCP path. Click Finish.
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