IBM eServer 135 xSeries User Reference Manual page 75

After you set up the priority filter in Priority Packet, start IBMSet and click
802.1p/802.1Q Tagging on the Advanced tab.
Note: IEEE 802.1p tagging increases the size of the packets that it tags. Some hubs
and switches will not recognize the larger packets and will drop them. Check
your hub or switch documentation to see if they support 802.1p. (You can
configure the switch to strip the tags from the packets and send it on to the
next destination as normal traffic.) If these devices do not support 802.1p or if
you are not sure, use High Priority Queue (HPQ) to prioritize network traffic.
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. The Ethernet controller in
your server, all IBM Netfinity 10/100 Ethernet Security Adapters, and IBM
10/100 Ethernet Server Adapters support 802.1p.
• The adapter cannot be assigned to an adapter team.
• If you are setting up virtual local area networks (VLANs) and packet tagging on
the same adapter, 802.1p/802.1Q tagging must be enabled on the IBMSet
Advanced tab.
If your network infrastructure devices do not support IEEE 802.1p or you are not sure,
you can still define filters and send packets as high priority. While High Priority
Queue (HPQ) does not 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 filter are sent out first. HPQ does not change network
routing, nor does it add any information to the packets.
To assign HPQ, you can specify it using Priority Packet when you create or assign a
filter.
To effectively use HPQ, the adapter cannot be assigned to an adapter team.
Virtual LAN mode: A VLAN is a logical grouping of network devices that are put
together as a LAN, regardless of their physical grouping or collision domains. Using
VLANs increases network performance and improves network security.
VLANs offer you the ability to group users and devices together into logical
workgroups. This can simplify network administration when connecting clients to
servers that are geographically dispersed in a building, campus, or enterprise
network.
Typically, VLANs are configured at the switch and any computer can be a member of
one VLAN per installed network adapter. Your Ethernet controller supersedes this by
communicating directly with the switch, enabling multiple VLANs on a single
network adapter (up to 64 VLANs).
To set up VLAN membership, your Ethernet controller must be attached to a switch
that has VLAN capability.
To join a VLAN from TurboLinux 6.05:
1. Create a VLAN on the switch. Use the parameters you assign there to join the
VLAN from the server. Refer to your switch documentation for more information.
2. Double-click the Network icon in the Control Panel window.
3. On the Adapters tab, select the adapter that you want to be on the VLAN, and
click Properties.
Chapter 5. Installing options
63