19-23
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 19
Configuring Circuit Emulation Services
Configuring T1/E1 Structured (n x 64) Circuit Emulation Services
Configuring a Hard PVC for Structured CES with a Shaped VP Tunnel
A shaped VP tunnel is a VP tunnel that, by default, carries only VCs of the constant bit rate (CBR)
service category with a peak cell rate (PCR). However, it is possible to configure a shaped virtual path
(VP) tunnel to carry VCs of other service categories. The overall output of the shaped VP tunnel is
rate-limited, by hardware, to the PCR of the tunnel.
This section describes how to configure a hard PVC for structured CES with a shaped VP tunnel, which
is a two-phase process, as follows:
•
Phase 1—Configuring a Shaped VP Tunnel, page 19-23
•
Phase 2—Configuring a Hard PVC, page 19-25
For more information about configuring shaped VP tunnels, see
Chapter 7, “Configuring Virtual
Connections.”
.
Figure 19-4
shows an example of a how a structured CES circuit can be configured with a shaped
VP tunnel.
Figure 19-4 Structured CES Circuit Configured with a Shaped VP Tunnel
Phase 1—Configuring a Shaped VP Tunnel
To configure a shaped VP tunnel, follow these steps, beginning in global configuration mode:
PBX
PBX
ATM
ATM
VP tunnel
CES module
CES module
VP tunnel
Network
27722
Command
Purpose
Step 1
Switch#
configure terminal
Switch(config)#
At the privileged EXEC prompt, enters global
configuration mode.
Step 2
Switch(config)#
atm
connection-traffic-table-row
[
index
row-index
]
cbr pcr
rate
Configures the connection traffic table row for
the desired PVP CBR cell rate.
Step 3
Switch(config)#
interface atm
card
/
subcard
/
port
Switch(config-if)#
Selects the physical interface to be configured.
Step 4
Switch(config-if)#
shutdown
Disables the interface.