Introduction 1-11
BPX Switch Operation
BPX Switch Routing Hubs
T1/E1 Frame Relay connections originating at IPX switch and IGX switch interface shelves and
T1/E1 Frame Relay, T1/E1 ATM, CES, and FUNI connections originating at MGX 8220 interface
shelves are routed across the routing network via their associated BPX switch routing hubs.
The following requirements apply to BPX switch routing hubs and their associated 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 switch hubs and IPX switch or IGX switch interface shelves are
either T3 or E3.
• The feeder trunks between BPX switch hubs and MGX 8220 interface shelves are T3, E3, or
OC3-c/STM-1.
• Frame Relay connection management to an IPX switch or IGX switch interface shelf is provided
by Cisco StrataView Plus.
• Frame Relay and ATM connection management to an MGX 8220 interface shelf is provided by
Cisco StrataView Plus.
• Telnet is supported to an interface shelf; the vt command is not.
• Frame Relay connections originating at IGX switch interfaces shelves connected to IGX switch
routing hubs may also be routed across BPX switch intermediate nodes.
• Remote printing by the interface shelf via a print command from the routing network is not
supported.
