Tier Network Definitions; Upgrades - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 1 The BPX Switch: Functional Overview

Tier Network Definitions

Annex G
BPX Routing Hub
MGX 8220 Interface Shelf A standards-based service interface shelf that connects to a BPX
MGX 8800 Interface Shelf A standards-based service interface shelf that connects to a BPX
IGX Interface Shelf
IGX Routing Hub
Feeder Trunk
IGX/AF
Routing Network
VPI
VCI

Upgrades

Converting an IGX node to an interface shelf requires reconfiguring connections on the node because
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 normally
available on BPX nodes. A BPX Hub supports up to 16 interface shelves.
Connections within tiered networks consist of distinct segments within each tier. A routing segment
traverses the routing network, and an interface shelf segment provides connectivity to the interface shelf
end-point. Each of these segments are added, configured and deleted independently of the other
segments.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Annex G is a bi-directional protocol, defined in Recommendation
Q.2931. It 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.
A BPX node in the routing network which has attached interface
shelves. Also referred to as a hub node or BPX hub.
routing hub, aggregrates and concentrates traffic, and performs
ATM adapation for transport over broadband ATM networks.
routing hub, aggregrates and concentrates traffic, and performs
ATM adapation for transport over broadband ATM networks.
A special configuration of an IGX switch that is connected as a
shelf to an IGX routing hub. An IGX interface shelf is sometimes
referred to as IGX A/F or feeder. The IGX interface shelf does not
perform routing functions nor keep track of network topology.
An IGX node in the routing network which has attached IGX
interface shelves. Also referred to as a hub node or IGX hub.
Refers to a trunk that 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.
Another name for the IGX interface shelf.
The portion of the tiered network that performs automatic routing
between connection endpoints.
Virtual Path Identifier.
Virtual Connection Identifier.
Cisco BPX 8600 Series Installation and Configuration
BPX Switch Operation
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