Cisco Headend System Release 2.7 User Guide

 

4022012 Rev B 

19 

 

The SNMP Poll Reports collect data by issuing up to three SNMP poll requests to 
each candidate DHCT. The term candidate DHCTs refers to DHCTs in the DNCS 
database that have an associated MAC address, IP address, QPSK Modulator, and 
QPSK Demodulator, along with an administrative status of In Service-Two Way. If a 
DHCT listed in the DNCS database does not meet all of these criteria, it will be 
excluded from the SNMP Poll Report. The SNMP poll request determines the 
current two-way communication ability of each DHCT. 

When the SNMP Poll Report is run, each candidate DHCT is polled (this is also 
called an SNMP "get" request). This SNMP poll collects all of the data necessary for 
generating the four SNMP Poll reports. The SNMP Poll reports are different views 
into the data collected.  

If a DHCT does not respond to the initial SNMP poll, it is polled up to two more 
times (for a maximum of three attempts). If the SNMP poll is unsuccessful after three 
attempts, the DHCT is considered to be a non-responder and will appear only on the 
Non-Responding DHCTs-SNMP Poll Report. However, if at least one of the three 
SNMP poll attempts succeeds, then the DHCT will appear in the OS/App Version, 
Memory, and DHCT Uptime Reports.  

Note: You can view the list of candidate DHCTs from the last SNMP Poll Report that 
was run by examining the /dvs/RepWriter/current/bin/maclist file.