HP PROCURVE 2520, Management And Configuration Manual

Page: 268 / 544

Port Trunking
Trunk Configuration Methods
Table 12-2. Trunk Configuration Protocols
Protocol Trunking Options
LACP Provides dynamic and static LACP trunking options.
(802.3ad)
• Dynamic LACP — Use the switch-negotiated dynamic LACP trunk when:
– The port on the other end of the trunk link is configured for Active or Passive LACP.
– You want fault-tolerance for high-availability applications. If you use an eight-link trunk you can also
configure one or more additional links to operate as standby links that will activate only if another
active link goes down.
• Static LACP — Use the manually configured static LACP trunk when:
– The port on the other end of the trunk link is configured for a static LACP trunk
– You want to configure non-default spanning tree or IGMP parameters on an LACP trunk group.
–
You want an LACP trunk group to operate in a VLAN other than the default VLAN and GVRP is disabled .
(Refer to “VLANs and Dynamic LACP” on page 12-23.)
– You want to use a monitor port on the switch to monitor an LACP trunk.
For more information, refer to “Trunk Group Operation Using LACP” on page 12-18.
Trunk Provides manually configured, static-only trunking to:
(non- • Most ProCurve switches not running the 802.3ad LACP protocol.
protocol)
• Windows NT and HP-UX workstations and servers
Use the Trunk option when:
– The device to which you want to create a trunk link is using a non-802.3ad trunking protocol
– You are unsure which type of trunk to use, or the device to which you want to create a trunk link is
using an unknown trunking protocol.
– You want to use a monitor port on the switch to monitor traffic on a trunk.
Refer to “Trunk Group Operation Using the “Trunk” Option” on page 12-26.
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