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CHAPTER
11-1
Cisco WAN Manager User’s Guide
Version 10.5, Part Number 78-12945-01 Rev. D0, August 2003
11
CWM to CWM Communications
Release 10 of Cisco WAN Manager has been designed to enable multiple CWM workstations to manage
a network with improved network synchronization and scalability. Due to the size and growth of
networks, it is faster to retrieve initial user data from another CWM workstation that is already running
and synchronized with the network. An industry standard CORBA architecture is used in Release 10 of
CWM to implement the communications between two or more CWM workstations. The architecture uses
a server-client structure for communications between the CWM server and client processes.
CWM workstations use CWM-CWM Communications to synchronize user data with each other. When
user data is provisioned or changed, the CWM workstations will propagate the new data to the other
CWM workstations. The user is able to continue the provisioning of network data, even when
communications between a Primary CWM and Secondary CWM have been interrupted. If for any reason
the communications between CWM servers are interrupted, the provisioning of the user data will be
suspended on the Secondary CWM, but not on the Primary CWM as user data provisioning will continue
on the Primary CWM. During that time, the provisioning of user data and monitoring of the network are
not impacted. This is called the Degraded Mode of Operation. This chapter introduces the CWM-CWM
Communications feature and also procedures for recovering from failures that may cause the CWM to
run in Degrade Mode.
Note CWM to CWM Communications does not affect network sync-up.
CWM Domain
A CWM domain consists of all CWM workstations in a network that are in communication with each
other. Each CWM workstation functions as a CWM gateway, however one CWM workstation is
designated as the Primary CWM for keeping the user data, and is the source of all user data that the
Secondary CWMs can sync with.
You can define a CWM domain by specifying a list of CWM workstations that will communicate with
each other, as described in this chapter under “Configuring CWM to CWM Communications”. All CWM
workstations in a given domain must be connected to the same set of networks to ensure that their
databases remain consistent.
Note The network.conf file does not have to be the same on all CWM stations in the domain as long as the
gateway nodes specified in this file are part of the same network. Even though CWMs that manage the
same network can talk to each other, managing the same network does not require having identical
network.conf files on all Secondary and Primary CWMs.