3Com NETBuilder SI Using the BRIDGE/ROUTER Your Network, Overview, Using Ethernet LAN, Ports

USING THE BRIDGE/ROUTER IN

2 YOUR NETWORK

	This chapter gives an overview of SuperStack II NETBuilder SI
	bridge/routers and describes how they fit in your network. It also
	describes the software features of the bridge/router.
Overview	SuperStack II bridge/routers maintain connectivity among small, midsize,
	and large branch offices and the corporate LAN.
	SuperStack II NETBuilder SI bridge/routers come with two Ethernet ports,
	two or four serial ports, and one of the following WAN ports: ISDN S/T
	(models 43x and model 53x), ISDN U (models 44x and 54x), 56/64 Kbps
	Carrier Service Unit/Data Service Unit (CSU/DSU) (models 45x and 55x), or
	T1/FT1 Telco port (models 46x and 56x). You can change any model 4xx
	bridge/router to another model 4xx, or any model 5xx to another model
	5xx, by installing, removing, or replacing an interface module.
	All models can be upgraded to any software package. All models have
	dual-image software support for upgrading and backup.
Using Ethernet LAN	The SuperStack II NETBuilder SI bridge/router provides connection to two
Ports	Ethernet LANs using either 10BASE-T or 100BASE-TX Ethernet. Boundary
	router models have one port disabled. If you upgrade to full router
	software, the second port will be functional.

Leaf node Boundary Routing® is not available on the model 5xx bridge/routers.