Example: Virtual Trunk Across An Atm Network - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Example: Virtual Trunk Across an ATM Network

The CBR/VBR parameter must also correspond to the virtual trunk type of the virtual trunk. For T3, set
PCR to 96000 and CDTV to 24000 for the connection so that the BXM does not drop cells. Cisco
recommends these values based on testing.
Step 5 Configure BXM trunks. Use uptrk to enable the virtual trunk on the port. Take this step if the ATM
cloud provider has assigned the VPC. On BXMs that connect to the cloud's ports, configure the virtual
trunks, as follows:
If the cloud is already configured, the alarm on the virtual trunk should clear.
When you use cnftrk to configure the virtual trunk, make sure the virtual trunk type and VPI correspond
to the existing Virtual Path connections (that is, make sure that the virtual trunk matches the cloud's
VPC configuration, uses the correct cell format (UNI or NNI), and that HCF-based shifting is
Ports on UXM cards that connect to a cloud must always be set to Shift off.
Connections between a port set to Shift on and a port set to Shift off are not guaranteed.
Step 6 Optionally, use cnfrsrc to configure the number of connection IDs (conids) and the bandwidth available
on the trunk. (Refer to the cnfrsrc command in this chapter.)
Step 7 Use addtrk to add the virtual trunk to the network topology.
The parameters slot.port.vtrk on a BXM card can have the following values:
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BXM cards support up to 31 virtual trunks, while UXM cards support up to 15 virtual trunks.
The two ends of a virtual trunk can have different port interfaces. For example, a virtual trunk
supported by a UXM-OC-3 on one end can be supported by a BXM-T3 at the other end.
However, both ends of the trunk must have the same:
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The
Example: Virtual Trunk Across an ATM Network
The procedure in this section gives the specific commands for every step in adding one virtual trunk
across an ATM network. This is a very typical situation.
This procedures assumes this hypothetical situation:
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Cisco BPX 8600 Series Installation and Configuration
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uptrk slot.port.vtrk
cnftrk slot.port.vtrk
addtrk slot.port.vtrk
Slot can be 1–6, 9–14.
Port is the physical port number, which can be 1–3 for T3/E3 or 1–2 for OC-3/STM1.
Vtrk is the virtual trunk number, which (for BXMs) can be 1–31 for T3/E3.
trunk bandwidth
connection channels
cell format
traffic classes
command verifies this when you add the trunk.
addtrk
On one side of the cloud is a BPX with a BXM trunk card in slot 4.
On the other side of the cloud is an IGX with a UXM trunk card in slot 10.
Chapter 25 Configuring BXM Virtual Trunks
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
.)
Shift on