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CHAPTER 2
Intel
®
NetStructure™ 470T and 470F Switches User Guide
Although there are eight priority levels, the 470 switches can only put a
packet into one of the two queues. The switch maps levels 0-3 to the low
queue and levels 4-7 to the high queue. If a packet is untagged, the switch
can be set to use either the high or low queue for that port. The
470 switches preserve the priority level of the packet.
HIGH
LOW
Incoming
packet
transmit
queue
for the
port
7
6
5
4
3
2
1
0
Express 460T
Network
Link Aggregation
Link aggregation allows you to combine from two to four (adjacent) ports so
that they function as a single high-speed link. For example, link aggregation
is useful when making connections between switches or connecting servers
to the switch.
You can use link aggregation, also known as port trunking, to increase the
bandwidth to some devices. Link aggregation can also provide a redundant
link for fault tolerance. If one link in the aggregation fails, the switch
balances the traffic among the remaining links.
To aggregate ports, you must link an “anchor” port with an adjacent port.
The 470 switches support up to four link aggregation groups (anchor ports
1,3, 5, or 7). All aggregated ports must be the same speed.
Note
When connecting to another
switch, connect anchor port to
anchor port and member port to
member port.