Figure 25-7 Virtual Trunks Across A Cisco Wan Switching Atm Cloud - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 25 Configuring BXM Virtual Trunks

Figure 25-7 Virtual Trunks across a Cisco Wan Switching ATM Cloud

SubNetwork
Configure the cloud ports. For each port connected to a BNI virtual trunk port, run these commands:
Step 2
upln <slot.port>
upport <slot.port>
cnfport <slot.port> and set the shift parameter to "N" for no shift if the cloud contains BPX
Execute addcon. In the cloud network, add a virtual path connection for each virtual trunk that is
to route through the cloud. An example of this syntax is:
addcon joker 5.1.1.* swstorm 6.2.10.*
Where 5.1 and 6.2 are ports hooked up and configured for virtual trunking. Daxcons are acceptable.
Note that the third number is the VPI which must correspond to the virtual trunk VPI you configured
by using cnftrk in Step 4.
When the cloud is a public ATM service and not a Cisco WAN Switching cloud, the VPI is provided by
the carrier, as well as the guaranteed BW associated with the VPI.
The Constant Bit Rate (CBR), Variable Bit Rate (VBR), and Available Bit Rate (ABR) parameters must
also correspond to the Virtual Trunk Type of the virtual trunk. For T3, set PCR to the bandwidth of the
virtual trunk, and CDVT to 24000 for the connection so that the card does not drop cells. These are
values that Cisco recommends based on testing.
Configure the Broadband Network Interface (BNI) virtual trunks. On the BNIs that connect to the cloud
Step 3
ports, configure up to 32 virtual trunks:
uptrk <slot.port.vtrk>
cnftrk <slot.port.vtrk>
For cnftrk, make sure that the virtual trunk type and the VPI correspond to the Virtual Path connections
that have been set up.
addtrk <slot.port.vtrk>
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
BNI
StrataCom
ASI
ATM cloud
StrataCom
SubNetwork
BNI
ASI
Virtual trunks
ASI
SubNetwork
Cisco BPX 8600 Series Installation and Configuration
Example: Virtual Trunk Across an ATM Network
BNI
StrataCom
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