Cisco Systems 8600 Series manual General, Definitions, Upgrades

BPX Routing Hubs in a Tiered Network

•Frame Relay and ATM connection management to an MGX 8220 interface shelf is provide by Cisco StrataView Plus

•Telnet is supported to an interface shelf; the vt command is not.

•Remote printing by the interface shelf via a print command from the routing network is not supported.

General

Annex G, a bi-directional protocol, defined in Recommendation Q.2931, is used for monitoring the status of connections across a UNI interface. Tiered Networks use the Annex G protocol to pass connection status information between a Hub Node and attached interface shelf.

Definitions

BPX Routing Hub	A BPX node in the routing network which has attached interface
	shelves. Also referred to as a hub node or BPX hub.
MGX 8220 Interface Shelf	A standards based service interface shelf that connects to a BPX
	routing hub, aggregrates and concentrates traffic, and performs ATM
	adapation for transport over broadband ATM networks.
IPX Interface Shelf	A special configuration of the IPX narrow band node designated as a
	interface shelf that supports frame relay connections.
IGX Interface Shelf	A special configuration of the IGX multi-band node designated as a
	interface shelf that supports frame relay connections.
Feeder Trunk	Refers to a trunk which interconnects an interface shelf with the
	routing network via a BPX routing hub. A feeder trunk is sometimes
	referred to as an interface shelf trunk.
IPX/AF	Another name for the IPX interface shelf
IGX/AF	Another name for the IGX interface shelf
Routing Network	The portion of the tiered network which performs automatic routing
	between connection endpoints.
VPI	Virtual Path Identifier
VCI	Virtual Connection Identifier

Upgrades

Converting an IPX or IGX node to an interface shelf requires re-configuring connections on the node, as no upgrade path is provided in changing a routing node to an interface shelf.

A BPX node, acting as a Hub Node, is not restricted from providing any other feature which is normally available on BPX nodes. A BPX Hub supports up to 16 interface shelves.

13-4Cisco BPX 8600 Series Reference