Cisco BPX 8600 Series, Руководство по установке и настройке

Страница: 513 / 630

29-17
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 29 Troubleshooting
Troubleshooting VSI Problems
incremented to keep count of the number of PVCs used. This counter can never exceed the number
configured. For the trunk interface, connections will be rerouted if the new value configured is less
than the old value. For the port interface,
cnfrsrc
will not allow you to decrease the configured value
to be less than the used value. You will need to delete connections before decreasing the PVC value.
How SVC Channels are Allocated and Configured
You can configure the number of SVC channels by using the
cnftrk
or the
cnfport
command. SVC and
VSI channels cannot co-exist. The command will block you from configuring channels if there are VSI
channels allocated.
How VSI Channels are Assigned for VSI Master to Slave VCs
When a VSI shelf is added with the
addshelf
command on the feeder interface, 12 LCNs are reserved
for master to slave VCs. The reason for 12 LCNs is that one LCN is needed to communicate to an active
BXM (with VSI functionality). The BPX has 15 slots possible, two of which are used for the BCC and
one used for the ASM card. The worse case is if the BPX has all BXM cards in the node, therefore the
master endpoint (that is, the card with the VSI shelf added) needs 12 LCNs to communicate with all the
cards on the node. The command
dspvsich
will display all the LCNs reserved for master to slave VCs
and interslave VCs.
How VSI Channels Are Configured/Allocated
VSI channels are configured through the cnfrsrc command. The user specifies a vsi min and a vsi max
for the partition. The number of channels that is allocated is max (sum_of_min, max_of_max).
For example:
port group 1:
port 1:minmax
partition 1: 10001000
port 2:
partition 1:2000 1000
port group 2:
port 3:
partition 1:20005000
port 4:
partition 1:20004000
For portgroup 1:
sum_of_min = 3000; max_of_max = 1000
For portgroup 2:
sum_of_min = 4000; max_of_max = 5000
Therefore, the number of channels allocated for VSI is 8000.
How Background Redundancy Channels are Allocated
The formula for getting the LCN is num 1. These channels are used for y-redundancy cards
to communicate with each other.