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Chapter 11 Network Management

CiscoWorks2000 Voice Management Features

11-12

Cisco IP Telephony Network Design Guide

78-11103-03

User Tracking

User Tracking (UT), a service module of the Campus Manager and ANI,

specifically discovers end user nodes such as systems, Cisco CallManager hosts,

Cisco IP Phones, and non-CDP systems as well. User Tracking performs an initial

discovery of all hosts in the topology map and a subsequent discovery to maintain

the user tracking table. You can specify a time limit for this subsequent discovery,

and the default is 1 hour.

The initial UT discovery performs the following steps to generate a phone table:

1. UT reads the Content Addressable Memory (CAM) and Address Resolution

Protocol (ARP) table of the switches and routers that have already been

discovered by ANI and recorded in the topology map.

2. Based on information from CAM and ARP queries, UT generates an end-user

table with device and port information. If the end user is a Cisco IP Phone,

UT performs the following steps:

–

It reads the phone entry from the CCM hosts, using the management

information base CISCO-CCM-MIB.

–

It generates a phone table that corresponds to the values depicted in

Figure 11-5.

–

For older models of Cisco IP Phones (Cisco IP Phone models 12 SP+ and

30 VIP), UT uses the CCM-MIB to query Cisco CallManager, and it

builds the phone table based on the device and port information gathered

from the initial discovery.

Note For non-Cisco IP phones, query is made to Cisco CallManager via

SNMP, and the returned information is cross-referenced with

information obtained from standard queries made to switches to get

MAC addresses and switch ports (query of CAM table) and from

queries made to routers to map IP addresses to MAC addresses

(query of ARP cache).

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 240