23-16
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 23 Configuring BXM Virtual Switch Interface
VSI Configuration Procedures
If there are not enough free LCNs in the Automatic Routing Management (AR) space, the
cnfrsrc
command does not fulfill a request to increase the VSI LCN space. In such a case, the
cnfrsrc
command
displays a failure message showing the number of currently free AR LCNs. You can reissue the
cnfrsrc
command specifying a smaller increase to the VSI partition. If that is not acceptable, you must first
delete and reroute the necessary number of AR connections. Then you can attempt
cnfrsrc
again.
Moving the VSI LCN boundary into the Automatic Routing Management space might step over LCNs
that are currently allocated. BPX software reprogram the necessary channels so that new channels out of
the lower AR LCN space are picked instead. Before starting the process of reprogramming the necessary
number of AR connections, the
cnfrsrc
command displays a warning message and waits for your
permission to proceed. The warning message shows the number of Automatic Routing Management
(AR) connections that are reprogrammed. After reprogramming the necessary channels the LCN
boundary is moved into the Automatic Routing Management space.
Note
You can migrate Automatic Routing Management connections only if the VPI range of the recipient
VSI partition is adjacent to Automatic Routing Management. To migrate Automatic Routing
Management connections to a nonadjacent VSI partition requires different VPIs within the recipient
VPI boundary.
Assigning a Service Template to an Interface
The ATM Class of Service templates (or Service Class Template, SCT) provide a means of mapping a
set of extended parameters. These are generally platform specific, based on the set of standard ATM
parameters passed to the VSI slave in a BXM port interface during initial setup of the interface.
A set of service templates is stored in each BPX 8650 switch and downloaded to the service modules
(BXMs) as needed during initial configuration of the VSI interface when a trunk or line is enabled on
the BXM.
Each service template type has an associated Qbin. The Qbins provide the ability to manage bandwidth
by temporarily storing cells and then serving them out based on a number of factors, including bandwidth
availability and the relative priority of different Classes of Service.
When ATM cells arrive from the Edge LSR at the BXM port with one of four CoS labels, they receive
CoS handling based on that label. A table look-up is performed, and the cells are processed, based on
their connection classification. Based on its label, a cell receives the ATM differentiated service
associated with its template type and service type (for example, label cos2 bw), plus associated Qbin
characteristics and other associated ATM parameters.
A default service template is automatically assigned to a logical interface (VI) when you up the interface
by using the commands
upport
and
uptrk
. The corresponding Qbin template is then copied into the
card’s (BXM) data structure of that interface.
Following are some examples of assigning a default service template by using the commands
upport
and
uptrk
:
•
uptrk 1.1
•
uptrk 1.1.1 (virtual trunk)
•
upport 1.1
This default template has the identifier of 1. To change the service template from service template 1 to
another service template, use the
cnfvsiif
command.
Содержание BPX 8650
Страница 49: ...P A R T 1 The BPX Switch ...
Страница 50: ......
Страница 159: ...P A R T 2 Installation ...
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Страница 273: ...P A R T 3 Initial Configuration and Network Management ...
Страница 274: ......
Страница 311: ...P A R T 4 Configuring Connections ...
Страница 312: ......
Страница 487: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 488: ......
Страница 533: ...P A R T 6 BPX Specifications ...
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Страница 555: ...P A R T 7 Appendices ...
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