Virtual IP's and Floating IP's

Hi Aaron,

 

 

Thanks for the response, that helps me understand. I wonder though if you or someone else could also explain some behavior I am observing in some testing I have underway.

 

 

As stated in my first message I am configuring a simple external/internal VLAN web farm scenario using an active/standby pair with a floating IP on my Internal VLAN

 

 

Virtual Server: 202.1.2.3 on VLAN External

 

Node: 192.168.1.2 on VLAN Internal

 

Floating IP: 192.168.100 on VLAN Internal

 

SNAT: Origin 'All Addresses' -> 202.1.2.3 on VLAN External

 

 

Its working well, I can load balance traffic to multiple nodes using the config above (although in the example I only indicate one node), however what confuses me is the result of a snoop below on the Node: (192.168.1.2) ... see below:

 

 

202.1.2.3 -> 192.168.1.2 TCP D=10000 S=38742 Ack=858808687 Seq=82764286 Len=0 Win=4380

 

202.1.2.3 -> 192.168.1.2 TCP D=10000 S=38742 Push Ack=858808687 Seq=82764286 Len=563 Win=4380

 

192.168.1.2 -> 202.1.2.3 TCP D=38742 S=10000 Ack=82764849 Seq=858808687 Len=0 Win=49077

 

192.168.1.2 -> 202.1.2.3 TCP D=38742 S=10000 Push Ack=82764849 Seq=858808687 Len=231 Win=49077

 

192.168.1.2 -> 202.1.2.3 TCP D=38742 S=10000 Fin Ack=82764849 Seq=858808918 Len=0 Win=49077

 

 

I thought I would not see the address of my Virtual Server, I thought the address would be SNAT'ed to the Floating IP.

 

 

If this config were to fail, how would my node direct traffic to the floating IP?

 

 

Any advice appreciated.

 

 

J