HP Aruba JL253A Management And Configuration Manual page 133

Table 12: General operating rules for port trunks
Media:
Port Configuration:
Trunk configuration:
Traffic distribution:
Chapter 5 Port Trunking
For proper trunk operation, all ports on both ends of a trunk group must have
the same media type and mode (speed and duplex). (For the switches, it is
recommended to leave the port mode setting at Auto or, in networks using
Cat 3 cabling, Auto-10.)
The default port configuration is Auto, which enables a port to sense speed
and negotiate duplex with an auto-enabled port on another device. It is
recommended that you use the Auto setting for all ports you plan to use for
trunking. Otherwise, you must manually ensure that the mode setting for each
port in a trunk is compatible with the other ports in the trunk. See:
Recommended port mode setting for LACP example
All of the following operate on a per-port basis, regardless of trunk
membership:
• Enable/Disable
• Flow control (Flow Ctrl)
LACP is a full-duplex protocol. See Trunk group operation using LACP on
page 142.
All ports in the same trunk group must be the same trunk type (LACP or trunk).
All LACP ports in the same trunk group must be either all static LACP or all
dynamic LACP.A trunk appears as a single port labeledDyn1(for an LACP
dynamic trunk) or Trk1 (for a static trunk of type LACP, Trunk) on various
menu and CLI screens. For a listing of which screens show which trunk types,
see How the switch lists trunk data on page 149.For spanning-tree or
VLAN operation, configuration for all ports in a trunk is done at the trunk level.
(You cannot separately configure individual ports within a trunk for spanning-
tree or VLAN operation.)
All of the switch trunk protocols use the SA/DA (source address/destination
address) method of distributing traffic across the trunked links. See Outbound
traffic distribution across trunked links on page 150.
Table Continued
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