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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
Chapter4 Configuring VISM Features
Configuring VISM Features
•The switched AAL2 PVC operating mode requires you to set up as many as 64 AAL2 PVCs
connected to each remote location supported by the network. The PVCs carry voice traffic across
the ATM network.
Each PVC is set up as three segments consisting of two local segments and one network segment.
The local segments are set up between the two VISM cards (one at the end of the PVC) and their
respective PXM cards. The network segment is set up between the two PXM cards across the
network. Refer to the Cisco MGX 8850 Release 1 installation and co nfigurat ion gu ide s fo r mor e
information.
In switched AAL2 PVC operating mode, you must bind endpoints to specific DS0s using the
addendpoint(s) commands. You must also create VCCIs (virtual circuit connection identifiers),
which identify each PVC and associate each PVC with a specific remote ATM address. At call setup
time, the call agent informs VISM which VCCI to use for the call and instructs VISM to set up a
CID for transport across the VCCI. This ensures that the binding of a DS0 to a CID and PVC is
dynamic by using of the called address.
Configuring PVC Connections for All Operating Modes
Complete the following steps to configure PVC connections for all operating modes:
Step 1 Type the addcon command, local-vci, pref-level, pvc-conn-type, conn-app, peak-cell-rate, conn-type,
|remote-conn-id, service-type, sus-cell-rate, and max-burst-rate| argument values, and press Enter to
add an ATM PVC between the VISM card and the MGX 8000 Series platform PXM card. Specify the
addcon command arguments with the following values:
•local-vci: In the range from 131 to 510.
•pref-level:
–
1 = Primary
–
2 = Secondary (for redundancy)
•pvc-conn-type:
–
1 = AAL5
–
2 = AAL2
–
3 = AAL1
•conn-app:
–
1 = Control
–
2 = Bearer
–
3 = Signaling
•peak-cell-rate (defined as cells per second):
–
In the range from 1 to 80000 for VoIP bearer.
–
In the range from 1 to 20000 for VoIP control.
–
In the range from 1 to 50000 for AAL2 T1.
–
In the range from 1 to 60000 for AAL2 E1.
–
In the range from 1 to 400 for AAL2 signaling (trunking).
–
In the range from 1 to 90000 for AAL5 bearer.
–
In the range from 1 to 10000 for AAL5 control.