HP LH4r HP Netserver 10/100TX PCI LAN Adapter Guide - Page 28
High Priority Queue
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Chapter 5 Configuring the Adapter and Installing Drivers The requirements for effectively using IEEE 802.1p tagging are: • The other devices receiving and routing 802.1p tagged packets must support 802.1p. • The adapters on these devices must support 802.1p (adapters using the 82558 or later Ethernet controller). All HP NetServer 10/100 adapters support 802.1p. • The adapter(s) cannot be assigned to an adapter team. • If you're setting up VLANs and packet tagging on the same adapter, you must select the 802.1p/802.1Q Tagging and the Enable option on the HPSet Advanced tab. High Priority Queue If your network infrastructure devices don't support IEEE 802.1p or you're not sure, you can still define priority filters and send packets as high priority. While High Priority Queue (HPQ) doesn't provide the precise priority levels of 802.1p tagging, it does assign traffic as either high or low priority, and sends high priority packets first. Therefore, if there are multiple applications on a system sending packets, the packets from the application with a priority filter are sent out first. HPQ doesn't change network routing, or add any information to the packets. To assign HPQ, you can specify it using Priority Packet when you create or assign a priority filter. To effectively use HPQ tagging, the adapter(s) cannot be assigned to an adapter team. 20