Specifications

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Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 7 Card Provisioning
Provisioning IPPM
The ONS 15454 performs section, line overhead, and pointer conversions between SDH and SONET.
However, to ensure operability, the following requirements must be met:
• The embedded payload must be compatible on both sides and require no conversion of any kind.
Examples of such payloads include concatenated ATM or Packet over SONET/SDH signals.
• The path overhead (POH) must be compatible on both sides and require no conversion of any kind.
Each overhead byte must be processed identically or simultaneously ignored. Key POH bytes to
consider are the J1 (path indicator) and C2 (payload format).
• You cannot enable intermediate path protection monitoring (IPPM) on OC-12 and OC-48 ports that
are enabled for SDH.
Most SONET and SDH routers and ATM switches can be configured to meet these requirements.
Procedure: Provision an OC-N Card for SDH
Step 1 Log into the node and double-click the OC-N card.
Step 2 Click the Provisioning > Line tabs.
Step 3 Under Type, choose SDH.
Step 4 Click Apply.
7.4 Provisioning IPPM
Intermediate-Path Performance Monitoring (IPPM) allows you to transparently monitor traffic
originating on DS-1, DS-3, DS3E and DS3XM cards (Path Terminating Equipment) as it passes through
EC-1, OC-3, OC-12, OC-48, and OC-192 cards (Line Terminating Equipment). To use IPPM, you create
the STS circuit on the DS-N cards, then enable IPPM on the EC-1 or OC-N cards that carry the circuit.
Note For Release 3.0 and later, IPPM is enabled for near-end (originating) traffic only. Far-end
(terminating) IPPM will be enabled in a future release.
For example, suppose you have an STS circuit that originates and terminates on DS-N cards at Nodes 1
and 4. You want to monitor the circuit as it passes through OC-N cards at Nodes 2 and 3. To do this, you
enable IPPM on the OC-N card by selecting the appropriate STS, in this example, STS 1 (Figure 7-3).