3Com 3500 manual Use only CoreBuilder 9400 systems as Mpla core switches, Connected, Switches

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.