Virtual Trunk Transmit Queuing; General Procedure To Set Up A Trunk; Table 25-3 Virtual Trunk Traffic Types - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

General Procedure to Set Up a Trunk

Virtual Trunk Transmit Queuing

In the BXM, the egress cell traffic out a port is queued in 2 stages:
•
•
In other words, these types of traffic are queued separately:

Table 25-3 Virtual Trunk Traffic Types

AutoRoute
VSI
These classes are all queued separately, and the overall queue depth of the virtual interface is the sum
of all the queue depths shared by all the available queues. Because each virtual trunk occupies one
virtual interface (VI), the overall queue depth available for the virtual trunk is that of its VI.
You do not directly configure the VI.
You use the cnftrkparm command to configure the queues within AutoRoute virtual trunks.
You use the cnfvsiif and cnfqbin commands to configure the queues within VSI virtual trunk VIs.
General Procedure to Set Up a Trunk
Before setting up a trunk, you must first finish setting up the nodes. Also, the front and back cards that
support the proposed line type and communication technology must reside in the slot intended for the
trunk.
The Ports and Trunks feature allows you to configure port, routing trunk and feeder trunk interfaces
simultaneously on a slot containing a BXM or UXM card. For example, you can up port 1 on a BXM
slot as a trunk interface while also upping port 2 as a line interface. For BXM and UXM cards, you do
not need to upgrade the firmware.
Cisco BPX 8600 Series Installation and Configuration
25-12
First they are queued per Virtual Interface (VI), each of which supports a virtual trunk.
Within each VI, the traffic is queued as per its normal OptiClass traffic type.
voice
time-stamped
non time-stamped
high-priority
bursty data A (bdataA)
bursty data B (bdataB)
cbr
vbr
abr
MPLS Classes of Service
UBR
PNNI traffic
Chapter 25 Configuring BXM Virtual Trunks
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001