Cisco Cisco Unified Operations Manager 8.0 White Paper
© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 33 of 70
The following cases provide examples of possible device discovery filtering scenarios:
Case 1: Configuring using the include and exclude filters.
Device
―
14.14.14.14
20.20.20.20
12.12.12.12
Exclude Filter
12.*.*.*
Out of range
Out of range
Within range
Include Filter
14.*.*.*
Within range
Out of range
Not applied
Result
―
Included
Excluded
Excluded
Case 2: Include filter not specified, so the default (. *.*.*.*) is used.
Device
―
14.14.14.14
20.20.20.20
12.12.12.12
Exclude Filter
12.*.*.* - 13.*.*.*
Out of range
Out of range
Within range
Include Filter
Not specified, use default
*.*.*.*
*.*.*.*
Within range
Within range
Not applied
Result
―
Included
Included
Excluded
Case 3: Exclude filter not specified, so the exclude filter is not applied.
Device
―
14.14.14.14
20.20.20.20
12.12.12.12
Exclude Filter
Not specified
Not applied
Not applied
Not applied
Include Filter
14.*.*.*
Within range
Out of range
Out of range
Result
―
Included
Excluded
Excluded
Case 4: No filters are specified, so all devices are included.
SysLocation Filter
The sysLocation filter is applied after the MIB II system table is queried from a device. Like the IP address filter,
you can set include and exclude filters. The exclude filter is applied first. If the sysLocation of a device satisfies
any of the specified exclude filters, the device is filtered out. The include filter is applied only if no exclude filters
apply to the device. The device will be populated in the DCR if its sysLocation field matches one of the include
filters.
DNS Domain Filter
The DNS filter works in a manner similar to the IP address and sysLocation filters. It performs a DNS lookup with a
given IP address to resolve a DNS name, then checks the specified include or exclude filters with the DNS domain
name. The exclude filter is applied before the include filter.
If multiple filters are specified, the IP address filters are applied first. The sysLocation filter is applied next, and
finally, the DNS domain filter is applied. Because other filters are not applied after a filter specification is satisfied
for a device, you should not specify a sysLocation filter and/or a DNS domain filter after the IP filters are specified.
The sysLocation filter and the DNS domain filters will be applied (in that order) only if the IP address filters are not
specified.
Phone Discovery
Phone discovery is performed separately from device discovery. Phone discovery starts after device discovery
completes. In Operations Manager, go to Administration > Device Management > Inventory Collection > IP
Phone to check the status of the last completed phone discovery.
When phones are discovered using a ping device discovery, those phones are placed in the Unknown state.