Port Trunking

Port Status and Configuration

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 to achieve fault-tolerance for high-availability applications where you want a four-link trunk (2600, 2600-PWR, 4100gl, and 6108) or an eight-link trunk (2800) with one or more standby links available in case an active link goes down. (Both ends of the link must be dynamic LACP.)

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 (STP) 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 12-24.)

 

– You want to use a monitor port on the switch to monitor an LACP trunk.

 

See “Trunk Group Operation Using LACP” on page 12-18.

 

 

Trunk

Provides manually configured, static-only trunking to:

(non-

• Most HP switches and routing 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 12-25.

FEC

Provides static trunking to forwarding devices that also support FEC (Fast

 

®

®

switches and routers, and some HP-UX and Windows NT servers.

 

EtherChannel ), such as some Cisco

 

Refer to “Trunk Operation Using the FEC Option” on page 12-25.

12-7