Optimizing Traffic Flow with Port Controls, Port Trunking, and Filters

Port Trunking

Table 9-3. Trunk Types Used in Static and Dynamic Trunk Groups

Trunking

LACP

Trunk

FEC

Method

 

 

 

 

 

 

 

Dynamic

Yes

No

No

Static

Yes

Yes

Yes

 

 

 

 

Table 9-4.

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 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 9-29.)

 

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

 

See “Trunk Group Operation Using LACP” on page 9-25.

 

 

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.

See “Trunk Group Operation Using the “Trunk” Option” on page 9-30.

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

 

See “Trunk Operation Using the FEC Option” on page 9-30.

9-13