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An Error Message Displayed Indicating that the Configured CIR-Percentage for EF Queues Exceeded the Threshold

Publication Date:  2013-10-08 Views:  114 Downloads:  0
Issue Description

NE5000E version: VRP (R) software, Version 5.60 (NE5000E V300R005C01)

On an NE5000E interface that had not been configured with cir-percentages (value range: integer ranging from 0 to 100) for any other queues, the cir-percentage for an EF queue could be set only to 30 or smaller. If it was set to 31 or greater, the system displayed "Error: The summation of outbound queues' CIR exceed the bandwidth of interface".

When the cir-percentage was set to 31:

[NE5000E-GigabitEthernet3/0/0]qos queue ef priority 1 cir cir-percentage 31 outbound
Error: The summation of outbound queues' CIR exceed the bandwidth of interface

When the cir-percentage 30 was set to 30:

[NE5000E-GigabitEthernet3/0/0]disp this
#
interface GigabitEthernet3/0/0
 undo shutdown
 ip address x.x.x.x 255.255.255.252
 qos queue ef priority 1 cir cir-percentage 30 outbound
Handling Process

1. Verified that the configuration method was correct.

2. Confirmed that, on an NE5000E interface, the default cir-percentages for BE, AF1, AF2, AF3, AF4, EF, CS6, and CS7 queues were 10, 10, 10, 15, 15 10, 5, and 5, and 20% bandwidth was reserved.

The sum of cir-percentages for all queues must not be greater than 100%. Otherwise, an error message would be displayed.

Therefore, the maximum cir-percentage for EF queues was 20 (system reserved bandwidth) + 10 = 30.
Root Cause
The default cir-percentages for BE, AF1, AF2, AF3, AF4, EF, CS6, and CS7 queues were 10, 10, 10, 15, 15 10, 5, and 5, and 20% bandwidth was reserved. The sum of cir-percentages for all queues must not be greater than 100%. Otherwise, an error message would be displayed.
Solution
Reserve less or no bandwidth for queues not used. It is recommended to set the cir-percentage for queues not used on the network to 0.
Suggestions
None

END