Cisco Systems 8600 Series BPX Routing Hubs in a Tiered Network, Tiered Network Implementation

BPX Routing Hubs in a Tiered Network

BPX Routing Hubs in a Tiered Network

Tiered networks with BPX routing hubs have the capability of adding interface shelves/feeders (non-routing nodes) to an IPX/IGX/BPX routing network (Figure 13-2). The MGX 8220 interface shelf, and IPX or IGX nodes configured as interface shelves are connected to BPX routing hubs. Interface shelves allow the network to support additional connections without adding additional routing nodes.

The MGX 8220 supports frame T1/E1, X.21 and HSSI frame relay, ATM T1/E1, and CES, and is designed to support additional interfaces in the future. The IPX interface shelf supports frame relay ports, as does the IGX switch (option is available to configure as an interface shelf).

Figure 13-2 Tiered Network with BPX Routing Hubs

SV+ Workstation (network management)

		Frame Relay		IPX
				shelf
Frame Relay			IPX
			shelf						BPX
								(routing
Frame Relay			AXIS						hub)
											IPX
			shelf			IGX
ATM T1/E1
							BPX				BPX
											(routing
							(routing
											hub)
							hub)
ATM T1/E1
Frame Relay			AXIS					Routing network
			shelf
	CES
			Frame Relay		IPX		IPX			Frame Relay
					shelf
							shelf

IPX	Frame Relay
shelf
		Frame Relay
AXIS
shelf
		CES

ATM T1/E1

AXIS Frame Relay shelf

IGX Frame Relay shelf S5278

Tiered Network Implementation

The following requirements apply to BPX routing hubs and their associated interface shelves:

•MGX 8220 Release 4 level is required on all MGX 8220 interface shelves.

•Only one feeder trunk is supported between a routing hub and interface shelf.

•No direct trunking between interface shelves is supported.

•No routing trunk is supported between the routing network and interface shelves.

•The feeder trunks between BPX hubs and IPX or IGX interface shelves are either T3 or E3.

•The feeder trunks between BPX hubs and MGX 8220 interface shelves are T3, E3, or OC3-c/STM-1.

•Frame Relay Connection management to an IPX interface shelf is provided by Cisco StrataView Plus

Tiered Networks 13-3