Re: Forwarding client request to VIP1 to VIP2 to RIPs

Roxana Diaconescu wrote:
> Hello Everyone,
> 
> I am trying to use two layers VIPs between the client and the real servers.
> 
> Idea:
> 
> VIP1's ipvsadm output:
> 
> TCP VIP1:xxxx rr
>  -> VIP2:xxx  gate/tunnel  1    0    0
> 
> VIP2's ipvsadm output:
> 
> TCP VIP2:xxx wrr
>  -> RIP1:xxxx  gate         1     0    0
>  -> RIP2:xxxx  gate         1     0    0
> 
> If I use gate for VIP1's "real server" (VIP2), I get connection
> refused. If I use tunnel, the connection just hangs. I used ultra
> monkey to configure everything. Layer 2 VIP works fine, but not VIP1
> on top of it.
> 
> Has anyone tried something similar? Intuitively seems that is should work:
> 
> Client connects to VIP1:xxxx
> VIP1:xxxx gets forwarded to VIP2:xxxx
> VIP2:xxxx gets forwarded to RIP1/2.
> 
> However, it doesn't. Any thoughts?

I suspect in the gate->gate case you are running into some kind of ARP problem.
You should use something like tcpdump, and examine the arp tables on
each machine to get a better picture of what is going on.

I'm not sure about tunnel, though this may end up being the first valid
use of it ever.

-- 
Horms                                           
H: http://www.vergenet.net/~horms/          W: http://www.valinux.co.jp/en/


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