Technical data

66 ServerIron ADX Advanced Server Load Balancing Guide
53-1002435-01
Other TCS options
2
Asymmetric flow
The control and data traffic between a client and cache server or between a cache server and a
real server can be asymmetric as described in Figure 16.
FIGURE 16 Asymmetric flow example
ServerIron ADX Failover
Failover of the router or ServerIron ADX device is supported as described in the following.
Configure VRRP on routers “R1’ and “R2”. Where R1 is the master or default gateway for both the
client and cache server the flow will be as shown in Figure 17.
FIGURE 17 Normal flow before failover
If the “R1” router or “ServerIron ADX 1” fails the flow will switch as shown in Figure 18.
FIGURE 18 Failover flow
During the failover, any traffic of the control or data channels won't be corrupted. After a short
break, all transport will continue.
Client
CIP
Real Server
RIP
Transparent
Cache Server
TIP
ServerIron ADX 1
R3 R4
R1 R2
ServerIron ADX 2
Session Sync Link
Client R1 SI1 Cache Server SI2 R2 Client
Cache Server SI1 R3 Real Server R4 SI2 Cache Server
Or
Client R1 SI1 Cache Server SI1 R1 Client
Client R2 SI2 Cache Server SI2 R2 Client