Changing the number of queues removes any bandwidth-min output settings in the startup configuration, and automatically re-allocates the GMB per queue as shown in the following table.
Default GMB percentage allocations per QoS queue configuration
|
802.1p priority |
8 Queues (default) | 4 Queues | 2 Queues | |||
|---|---|---|---|---|---|---|
| Queue | GMB | Queue | GMB | Queue | GMB | |
| 1 (lowest) | 1 | 2% | 1 | 8% | 1 | 20% |
| 2 | 2 | 3% | ||||
| 0 (normal) | 3 | 30% | 2 | 17% | ||
| 3 | 4 | 10% | ||||
| 4 | 5 | 10% | 3 | 30% | 2 | 80% |
| 5 | 6 | 10% | ||||
| 6 | 7 | 15% | 4 | 45% | ||
| 7 (highest) | 8 | 20% | ||||
|
|
|
![[NOTE: ]](images/note.gif) |
NOTE: See the Management and Configuration Guide. for your switch. |
|
|
When 10 Mbps ports on an 8200zl or 5400zl switch are configured in QoS for eight outbound queues (the default), and the guaranteed minimum bandwidth is set for 5 Mbps or less for a given queue, then packets in the lower-priority queues may be discarded on ports that are oversubscribed for extended periods of time. If the oversubscription cannot be corrected, HP recommends reconfiguring the switch to operate with four outbound queues. The command to do this is:
This issue applies to 8200zl and 5400zl switches operating with any of the following modules installed.
| HP device | Product number | Minimum supported software version |
|---|---|---|
| HP Switch 24-port 10/100/1000 PoE+v2 zl Module | J9534A | K.15.02.0004 |
| HP Switch 20-port 10/100/1000 PoE+ / 4-port SFP v2 zl Module | J9535A | K.15.02.0004 |
| HP Switch 20-port 10/100/1000 PoE+ / 2-port 10-GbE SFP+ v2 zl Module | J9536A | K.15.02.0004 |
| HP Switch 24-port SFP v2 zl Module | J9537A | K.15.02.0004 |
| HP Switch 8-port 10-GbE SFP+ v2 zl Module | J9538A | K.15.02.0004 |
| HP 24-port 10/100 PoE+ v2 zl Module | J9547A | K.15.02.0004 |
| HP 20-port Gig-T / 2-port 10-GbE SFP+ v2 zl Module | J9548A | K.15.02.0004 |
| HP 20-port Gig-T / 4-port SFP v2 zl Module | J9549A | K.15.02.0004 |
| HP 24-port Gig-T v2 zl Module | J9550A | K.15.02.0004 |
| HP 12-port Gig-T / 12-port SFP v2 zl Module | J9637A | K.15.02.0004 |