Raritan Engineering CC-SG ユーザーズマニュアル

162 C

OMMAND

C

ENTER 

S

ECURE 

G

ATEWAY 

A

DMINISTRATOR 

G

UIDE

 

 

 

 

A.   Choose Primary/Backup mode to implement network failover and redundancy. In 

this mode, only one NIC is active at a given point of time and only one network IP 
address assignment is possible.  

 

 

Typically, both NICs are attached to the same LAN sub-network, but different 
switches (or hubs) may be used for reliability. When both NICs are used, a level of 
network redundancy is provided. For example, if LAN1 is connected and is receiving 
a Link Integrity signal, CC-SG uses this NIC for all communications. In the event of 
a LAN1 failure and assuming LAN2 is connected, CC-SG migrates the assigned 
(possibly by DHCP) IP address to LAN2. LAN2 will be used until LAN1 is repaired 
and returned to service. When this happens, CC-SG reverts to using LAN1.  
As long as one interface is viable, a PC client should not notice any disruption in 
service during a failure. CC-SG remains at the same logical IP address, but attempts 
to keep communication channels and existing sessions up in the event of possible 
network failures. All communication (for example, PC client, Raritan device 
management, cluster peer, etc.) is carried over this single communication channel 
that is maintained by both NICs.  

B.   Choose  Active/Active mode if you have special network conditions; particularly if 

you have two networks where routing may not exist. If network security is important 
and if you are using proxy-type deployments, you also should choose this mode.