applications, conferencing devices, and call processors such as CTS-Manager,
Cisco TMS, Cisco VCS, and Cisco Unified CM.
All endpoints and
infrastructure devices registered with CTS-Manager, Cisco TMS, Cisco Unified
CM, and Cisco VCS are discovered automatically during logical discovery.
Logical discovery of
CTS-Manager discovers Cisco TMS, Cisco Unified CM, CTS, Cisco Cius, IP phones,
routers, and switches.
Logical discovery of Cisco
TMS discovers VCS, codec, Cisco MCU, TPS, Cisco IP Video Phone E20, and Cisco
To discover clusters using
logical discovery, you must discover the publisher of the cluster, which will
automatically discover its subscribers and all the endpoints and infrastructure
devices registered with both publisher and subscribers.
Logical discovery of the
Cisco Unified CM publisher discovers other Cisco Unified CMs (subscribers) in
the network, Cisco Unity, Cisco MGCP Voice Gateways, H.323 Voice Gateways,
Gatekeepers, CTI applications.
Endpoints and infrastructure
devices that are not registered with any of the management applications,
conferencing devices, or call processors cannot be discovered using logical
discovery. Use ping sweep or direct discovery to discover these devices. For
more information on cluster discovery, see
Deleted devices are not
discovered again through Logical Discovery, you have to rediscover them. You
can filter deleted devices using the quick filter in Device Work Center.
Cisco Discovery Protocol
independently of media and protocol used. This protocol runs on all
Cisco-manufactured equipment, including routers, access servers, bridges, and
This discovery method queries
the CDP Neighbor Table to find neighboring devices. When CDP is enabled,
discovery queries the CDP cache on each seed device (and its peers) via SNMP.
After CDP discovery, a logical discovery is performed automatically. That is,
if a call processor or a management device is discovered by CDP discovery, then
all endpoints and infrastructure devices registered with it are also
CDP must be enabled on the
devices to perform CDP discovery.
There is no limit on the number of seed devices that can be
used for CDP discovery. However, for a large network, it is advised to perform
this on limited chunks of seed devices rather than all at once.
Discovers devices within a
range of IP addresses from a specified combination of IP address and subnet
This method pings each IP
address in the range to check the reachability of devices. If a device is
reachable, you must specify a list of subnets and network masks to be pinged.
After ping sweep discovery, a logical discovery is performed automatically.
That is, if a call processor or a management device is discovered by ping sweep
discovery, then all endpoints and infrastructure devices registered with it are
Ping Sweep discovery does not
require seed devices. Instead, you must specify a list of subnets and network
masks to be pinged.
Ping Sweep discovery may take
longer than usual to discover devices if the IP ranges are large.
You must create an “Any”
credential profile for ping sweep and CDP discovery.
Ping Sweep does not work for
devices with IPv6 addresses.