7-3
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 7
Configuring Virtual Connections
Configuring Virtual Channel Connections
Note
The value of the VPIs and VCIs can change as the traffic is relayed through the ATM network.
To configure a point-to-point VCC, perform the following steps, beginning in global configuration
mode:
Note
The row index for
rx-cttr
and
tx-cttr
must be configured before using this optional parameter. See
Chapter 9, “Configuring Resource Management.”
Note
When configuring PVC connections, begin with lower VCI numbers. Using low VCI numbers allows
more efficient use of the switch fabric resources.
Note
This parameter specifies the weight assigned to the output VC for weighted round robin scheduling and
is an integer in the range of 1 to 15.This parameter is valid only on systems equipped with the switch
processor feature card. (Catalyst 8540 MSR and Catalyst 8510 MSR and LightStream 1010 with
FC-PFQ). For more information on scheduling, see “Scheduling Output” in the
Guide to ATM
Technology.
Note
The
sched
option is only available on OC-48c interfaces. Each OC-48c interface has four OC-12
schedulers. The sched variable is used to select the specific OC-12 scheduler for which the virtual circuit
is assigned for output on an interface and is therefore a number between 1 and 4.
Examples
The following example shows how to configure the internal cross-connect PVC on Switch B between
interface ATM 3/0/1 (VPI = 0, VCI = 50) and interface ATM 3/0/2 (VPI = 2, VCI = 100)
(see
Figure 7-1
):
Switch-B(config)#
interface atm 3/0/1
Switch-B(config-if)#
atm pvc 0 50 interface atm 3/0/2 2 100
Command
Purpose
Step 1
Switch(config)#
interface atm
card
/
subcard
/
port
Switch(config-if)#
Selects the interface to be configured.
Step 2
Switch(config-if)#
atm pvc
vpi-A
[
vci-A
|
any-vci
1
]
[
rx-cttr
index
] [
tx-cttr
index
]
[
wrr-weight
weight
] [
sched
sched-A
]
interface
atm
card
/
subcard
/
port
[
.
vpt#
]
vpi-B
[
vci-B
|
any-vci
1
][
wrr-weight
weight
] [
sched
sched-B
]
1.
The
any-vci
parameter is only available for interface atm0.
Configures the PVC.