9-34
Optimizing Traffic Flow with Port Controls, Port Trunking, and Port-Based Priority
Configuring Port-Based Priority for Incoming Packets
member of the VLAN, the packet carries its priority setting to the next,
downstream device. If the outbound port is not configured as a tagged member
of the VLAN, then the tag is stripped from the packet, which then exits from
the switch without a priority setting.
Outbound Port Queues and Packet Priority Settings
Switch 4108GL ports use three outbound port queues,
Low
,
Normal,
and
High
.
As described below, these three queues map to the eight priority settings
specified in the 802.1p standard.
Table 9-8.
Mapping Priority Settings to Device Queues
For example, suppose you have configured port A10 to assign a priority level
of 1 (low):
■
An untagged packet coming into the switch on port A10 and leaving the
switch through any other port configured as a tagged VLAN member
would leave the switch as a tagged packet with a priority level of 1.
■
A tagged packet with an 802.1p priority setting of 0 (zero) coming into the
switch on port A10 and leaving the switch through any other port config-
ured as a tagged VLAN member would leave the switch as a tagged packet
with a priority level of 1.
■
A tagged packet with an 802.1p priority setting (1 - 7) coming into the
switch on port A10 and leaving the switch through any other port config-
ured as a tagged VLAN member would keep its original priority setting
(regardless of the port-based priority setting on port A10).
802.1p Priority Settings Used
In Tagged VLAN Packets
Series 4100GL
and Other
Devices with 3
Outbound Port
Queues
Queue Assignment in Downstream Devices
With:
4 Queues
8 Queues
2 Queues
1 (low)
Low
1
1
1
2 (low)
Low
1
2
1
0 (normal priority)
Normal
2
3
1
3
Normal
2
4
1
4
High
3
5
2
5
High
3
6
2
6
High
4
7
2
7 (high priority)
High
4
8
2
Summary of Contents for ProCurve 4104GL
Page 2: ......
Page 26: ...xxiv Getting Started Need Only a Quick Start ...
Page 34: ...1 8 Selecting a Management Interface Advantages of Using HP TopTools for Hubs Switches ...
Page 50: ...2 16 Using the Menu Interface Where To Go From Here ...
Page 172: ...8 24 Time Protocols SNTP Messages in the Event Log ...
Page 240: ...10 30 Configuring for Network Management Applications CDP ...
Page 288: ...11 48 Port Based Virtual LANs VLANs and GVRP GVRP ...
Page 480: ...C 38 Troubleshooting Restoring a Flash Image ...
Page 486: ...D 6 MAC Address Management Determining MAC Addresses ...
Page 490: ......
Page 502: ...12 Index ...
Page 503: ......