How The Switch Lists Trunk Data - HP ProCurve 6400cl Series Management And Configuration Manual

Port Trunking

How the Switch Lists Trunk Data

12-26
How the Switch Lists Trunk Data
Static Trunk Group: Appears in the menu interface and the output from the
CLI show trunk and show interfaces commands.
Dynamic LACP Trunk Group: Appears in the output from the CLI show lacp
command.
Interface Option
Menu Interface
CLI show trunk
CLI show interfaces
CLI show lacp
CLI show spanning-tree
CLI show igmp
CLI show config
Outbound Traffic Distribution Across
Trunked Links
All three trunk group options (LACP, Trunk and, on the 5300xl only, FEC) use
source-destination address pairs (SA/DA) for distributing outbound traffic
over trunked links.
SA/DA (source address/destination address) causes the switch to distribute
outbound traffic to the links within the trunk group on the basis of source/
destination address pairs. That is, the switch sends traffic from the same
source address to the same destination address through the same trunked link,
and sends traffic from the same source address to a different destination
address through a different link, depending on the rotation of path assign­
ments among the links in the trunk. Likewise, the switch distributes traffic for
the same destination address but from different source addresses through
different links. Because the amount of traffic coming from or going to various
nodes in a network can vary widely, it is possible for one link in a trunk group
to be fully utilized while others in the same trunk have unused bandwidth
capacity even though the address assignments are evenly distributed across
Dynamic LACP Static LACP
Trunk Group Trunk Group
No Yes
No Yes
No Yes
Yes Yes
No Yes
No Yes
No Yes
Static Non-Protocol or
FEC Trunk Group
(5300xl Switches Only)
Yes
Yes
Yes
No
Yes
Yes
Yes