Load balancing for web servers

[Philippe LAQUET]

"The master of the address sends out CARP advertisement messages via 
multicast using the CARP protocol (IP Protocol 112) on a regular basis, 
and the backup hosts listen for this advertisement. If the 
advertisements stop, the backup hosts will begin advertising."


I'm afraid CARP will not be routed on some WAN architectures... Because 
of the IP Protocol #112 that may not be routed by your ISP and the 
Internet segment you're on, and it uses multicast...





Philippe LAQUET a écrit :
> You can also take a look on LVS/IPVS...
> 
> http://kb.linuxvirtualserver.org/wiki/LVS/TUN_mode_with_FreeBSD_and_Solaris_realserver 
> 
> 
> The software is also available for FreeBSD and works on WAN 
> architectures. I didn't test it yet but used sucessfully on Lin boxes.
> 
> Hope this helps...
> 
> Philippe LAQUET
> 
> 
> 
> Mike Jakubik a écrit :
>> Max Laier wrote:
>>> On Wednesday 30 August 2006 18:52, Mike Jakubik wrote:
>>>  
>>>> Max Laier wrote:
>>>>   
>>>>> Have a look at: http://www.countersiege.com/doc/pfsync-carp/#big for
>>>>> one idea.  All requirements (carp, pf and pfsync) are available in
>>>>> FreeBSD as well.
>>>>>       
>>>> You can load balance with CARP, but AFAIK it only works on the local
>>>> network segment, i.e. it wont work past a router.
>>>>     
>>>
>>> Did you look at the sollution described at the above URL?
>>>
>>>   
>>
>> The link did not work, it seems to work now though. Good info.
>>
>>
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> 

	
	
		
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