Management and Configuration Guide K/KA/KB.15.15

Table 16 Default GMB percentage allocations per QoS queue configuration
2 queues4 queues8 queues (default)802.1p priority
90%
10%
2%1 (lowest)
3%2
70%
30%0 (normal)
10%3
10%
10%
10%4
10%5
10%
15%6
20%7 (highest)
For more information on queue configuration and the associated default minimum bandwidth
settings, (see the Advanced Traffic Management Guide.)
Impact of QoS queue configuration on GMB commands.
Changing the number of queues causes the GMB commands (interface bandwidth-min and
show bandwidth output) to operate only on the number of queues currently configured. In
addition, when the qos queue-config command is executed, any previously configured
bandwidth-min output settings are removed from the startup configuration.
Jumbo frames
The maximum transmission unitize IP frame the switch can receive for Layer 2 frames inbound on
a port. The switch drops any inbound frames larger than the MTU allowed on the port. Ports
operating at a minimum of 10 Mbps on the HP 3500 switches and 1 Gbps on the other switches
covered in this guide can accept forward frames of up to 9220 bytes (including four bytes for a
VLAN tag) when configured for jumbo traffic. You can enable inbound jumbo frames on a per-VLAN
basis. That is, on a VLAN configured for jumbo traffic, all ports belonging to that VLAN and
operating at a minimum of 10 Mbps on the HP 3500 switches and 1 Gbps on the other switches
covered in this guide allow inbound jumbo frames of up to 9220 bytes.
Minimum speed for jumbo trafficSwitch model
10 Mbps3500
1 GbpsAll others in this guide
Operating rules for jumbo frames
Required port speed This feature allows inbound and outbound jumbo frames on ports
operating at a minimum of 10 Mbps on the HP 3500 switches
and 1 Gbps on the other switches.
Switch meshing If you enable jumbo traffic on a VLAN, all meshed ports on the
switch are enabled to support jumbo traffic. (On a given meshed
switch, every meshed port operating at 1 Gbps or higher
becomes a member of every VLAN configured on the switch.)
GVRP operation A VLAN enabled for jumbo traffic cannot be used to create a
dynamic VLAN. A port belonging to a statically configured,
jumbo-enabled VLAN cannot join a dynamic VLAN.
Port adds and moves If you add a port to a VLAN that is already configured for jumbo
traffic, the switch enables that port to receive jumbo traffic. If
192 Port Traffic Controls