Network Management - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

BPX Switch Operation
Use the Cisco WAN Manager Connection Manager to configure and control these individual segments
as a single end-to-end connection.
Interface shelves are attached to the routing network via a BPX routing hub using a BXM trunk (T3/E3
or OC-3) or BNI trunk (T3/E3). The connection segments within the routing network are terminated on
the BNI feeder trunks.
All Frame Relay connection types that can terminate on the BPX are supported on the BNI feeder trunk
(VBR, CBR, ABR, and ATF types). No check is made by the routing network to validate whether the
connection segment type being added to a BNI feeder trunk is actually supported by the attached
interface shelf.
Co-locating Routing Hubs and Interface Shelves
The trunk between an interface shelf and the routing network is a single point of failure, therefore, the
interface shelves should be co-located with their associated hub node. Card level redundancy is
supported by the Y-Cable redundancy for the BXM, BNI, AIT, and BTM.

Network Management

Communication between CPE devices and the routing network is provided in accordance with Annex
G of Recommendation Q.2931. This is a bidirectional protocol for monitoring the status of connections
across a UNI interface. (Note: the feeder trunk uses the STI cell format to provide the ForeSight rate
controlled congestion management feature.)
Communication includes the real time notification of the addition or deletion of a connection segment
and the ability to pass the availability (active state) or unavailability (inactive state) of the connections
crossing this interface.
A proprietary extension to the Annex G protocol is implemented which supports the exchange of node
information between an interface shelf and the routing network. This information is used to support the
IP Relay feature and the Robust Update feature used by network management.
Network Management access to the interface shelves is through the IP Relay mechanism supported by
the SNMP and TFTP projects or by direct attachment to the interface shelf. The IP Relay mechanism
relays traffic from the routing network to the attached interface shelves. No IP Relay support is
provided from the interface shelves into the routing network.
The BPX routing hub is the source of the network clock for its associated feeder nodes. Feeders
synchronize their time and date to match their routing hub.
Robust Object and Alarm Updates are sent to a network manager that has subscribed to the Robust
Updates feature. Object Updates are generated whenever an interface shelf is added or removed from
the hub node and when the interface shelf name or IP Address is modified on the interface shelf. Alarm
Updates are generated whenever the alarm state of the interface shelf changes between Unreachable,
Major, Minor and OK alarm states.
An interface shelf is displayed as a unique icon in the Cisco WAN Manager topology displays. The
colors of the icon and connecting trunks indicate the alarm state of each.
Channel statistics are supported by FRP, FRM, ASI, and MGX 8220 endpoints. BNIs, AITs, and BTMs
do not support channel statistics. Trunk Statistics are supported for the feeder trunk and are identical to
the existing BNI trunk statistics.
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Cisco BPX 8600 Series Installation and Configuration
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Preferred Routing
Preferred routing within the routing network can be used on all connections. Priority bumping is
supported within the routing network, but not in the interface shelves. All other connection features
such as conditioning, rrtcon, upcon, dncon, and so on, are also supported.
Chapter 1 The BPX Switch: Functional Overview
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001