Cisco Headend System Release 2.7 Installation Guide

 

4042389 Rev A 

95 

 

22  Customer needs to make Go/No-Go decision regarding whether to proceed with 

the Switch-Back to the Primary DNCS during the next maintenance window. 

23  Perform a Disaster Recovery Switch-Back. This process makes the Primary 

DNCS the Active DNCS and the Standby DNCS the Inactive DNCS. 

24  Verify that the Switch-Over was successful by: 

a  Verifying that the correct network switch ports on the Primary DBDS 

isolation network switch are up and that the correct network switch ports on 
the Standby DBDS isolation network switch are down. 

b  Verifying that the Disaster Recovery "bit-bucket" and "QAM emulation 

gateway" are no longer present in the Primary DNCS routing table. The bit-
bucket IP address is 192.168.1.4 and the "QAM emulation gateway" address is 
the Primary MC IP address. 

- netstat -rvn |grep 192.168.1.4 
Note: You should not see any occurrence of 192.168.1.4 in the routing table. If 
you do, you will want to flush the routing table and then setup the correct 
routes by executing the /etc/rc2.d/S82atminit file. 
- route -f  
- netstat -rvn |grep <Primary MC IP Address> 
Note: You should not see any occurrence of the Primary MC IP address in the 
routing table. If you do, you will want to flush the routing table and then 
setup the correct routes by executing the /etc/rc2.d/S82atminit file. 

25  Run a DNCS Doctor report on the Primary DNCS and analyze it for 

issues/anomalies. 

26  On the Primary DBDS (Active DBDS) System, verify that a DHCT can boot and 

can receive advanced services (VOD, IPG, xOD, SDV, etc.). You will want to boot 
and verify SARA, Aptive/Pioneer, and MDN/ODN DHCTs if you have them. 
Troubleshoot any issues before proceeding. 

27  Customer needs to make Go/No-Go decision regarding whether to proceed or 

Switch-Back to the Standby DNCS.