324CHAPTER 12: MULTIPOINT LINK AGGREGATION (MPLA)

bridge mpla mode Enables or disables the MultiPoint Link Aggregation feature on the

3500

switch.

Valid Minimum Abbreviation

9000

9400

b mp m

3900

Important Considerations

Use only CoreBuilder 9400 systems as MPLA core switches.

9300

 

The core of a multipoint aggregated link must contain two 9400

 

switches, whose out-of-band management ports also must be directly

 

connected.

 

Use only Switch 3900 devices as edge switches.

 

Each MPLA edge switch must have at least one physical link to each

 

core switch. Multiple trunked links may connect an edge and core

 

switch, for added bandwidth

 

Use only Gigabit Ethernet links between MPLA core switches and

 

edge switches.

 

All links from an edge switch to the MPLA core switches must be

 

aggregated (trunked) at the edge switch.

 

While the Trunk Control Message Protocol (TCMP) is optional in

 

point-to-point trunks, you must configure it to run on all of the

 

point-to-multipoint links between MPLA edge switches and core

 

switches.

 

You can enable these features in MPLA edge switches, but not in

 

MPLA core switches:

 

Spanning Tree

 

IGMP snooping

 

Resilient links

 

Roving analysis port

 

When you configure a new MPLA core switch, define MPLA

 

configurations and reboot the switch before you define other trunks

 

and VLANs on the switch.

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Image 324
3Com 3500 Use only CoreBuilder 9400 systems as Mpla core switches, Connected, Switch, for added bandwidth, Switches