Cisco Systems OL-7396-01 Configuring a Hard PVC for Structured CES

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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter19 Configuring Circuit Emulation Services
Configuring T1/E1 Structured (n x 64) Circuit Emulation Services
Configuring Network Clocking for Structured CES
Circuit emulation services require that the network clock be configured properly. For structured services,
synchronous clocking is required. For instructions on configuring network clocking, see Chapter 3,
“Initially Configuring the ATMSwitch Router.”. For a discussion of clocking issues and network
examples, refer to the network clock synchronization and network clocking for CES topics in the Guide
to ATM Technology.
Configuring Synchronous Clocking With an OC-12c Interface Module
When synchronous clocking is being used and propagated via an OC-12c interface module, be sure to
use the following configurations:
•For the Catalyst 8540 MSR, use the optional clocking module.
•For the Catalyst 8510 MSR and LightStream 1010 ATM switch routers, use feature card per flow
queueing (FC-PFQ).
Configuring a Hard PVC for Structured CES
This section describes how to configure a hard permanent virtual cha nnel (PVC) for structured circuit
emulation services.
Figure 19-3 shows that the hard PVC for structured CES connection is configured with the following
parameters:
•Four time slots (DS0 channels 1 to 3, and 7) are configured for a circuit named CBR-PVC-A.
•ATM port 0/1/3 in the ATM switch router is designated as the destination port of the hard PVC.
•The CES AAL1 service is structured and the clock source is network-derived.
•The framing is esf and the line code is b8zs.
Figure19-3 Hard PVC Configured for Structured CES
ATM port adapter CES port adapter
Target switch
27211
Destination port
Port ID - ATM0/1/3
(Explicit VPI 0, VCI 100)
Source port
Port ID - CBR3/0/0
CBR-PVC-A
(Implicit VPI 0, VCI 16)
(DSO 1-3, and 7)
0
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