[f-nsp] Foundry ServerIron - source-nat

[Nils Domrose]

Hi,

you need to ensure that the return traffic is going through the  
serveriron either by defining the layer2 path or
by pointng the default gateway of the servers to the serviron.

  An other option would be to use direct server return (DSR) in case  
you do not need any persistence. Just configure a second loopback an  
each real server with the VIP as IP address and set

port <your port > dsr in the virtual server configration. (search  
foundry documentation for dsr details)


Nils
On Nov 1, 2007, at 2:00 PM, Gaurav Sabharwal wrote:

> Hi,
>
> We have a ServerIron XL Load Balancer on which we do SLB for mysql and
> http. We have source-nat enabled. In order to get the client IP  
> address
> in the log file for statistics, etc. I wanted to disable the source- 
> nat
> for one particular VIP compromising of two real servers.
>
> After disabling the source-nat from the real servers, the traffic to  
> the
> real server stops. Below is the relevant configuration.
>
> server real server1.test.com 192.168.254.2
>  port http
>  port http url "HEAD /"
> !
> server real server2.test.com 192.168.254.3
>  port http
>  port http url "HEAD /"
> !
> server virtual www.test.com 192.168.254.1
>  predictor least-conn
>  port http sticky
>  bind http server1.test.com http server2.test.com http
>
> The configuration works fine if I add the source-nat command to the  
> real
> servers. global source-nat is not enabled.
>
> #sh ver
>  SW: Version 07.3.05T12 Copyright (c) 1996-2002 Foundry Networks, Inc.
>      Compiled on Jul 18 2002 at 17:20:18 labeled as SLB07305
>  HW: ServerIron Switch, serial number 157b24
>  400 MHz Power PC processor 740 (revision 8) with 32756K bytes of DRAM
>    8 100BaseT interfaces with Level 1 Transceiver LXT975
>    0  uplink interfaces
>  256 KB PRAM and 8*2048 CAM entries for DMA 2, version 0807
>  128 KB boot flash memory
> 4096 KB code flash memory
> 2048 KB BRAM, BM version 02
>  128 KB QRAM
>  512 KB SRAM
> Octal System, Maximum Code Image Size Supported: 1965568 (0x001dfe00)
> The system uptime is 1 hours 19 minutes 50 seconds
> The system : started=warm start   reloaded=by "reload"
>
> Thanks,
> - Gaurav
>
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