multiple tftp servers

Eric Helm helmwork at
Tue Sep 26 21:15:46 UTC 2006

Simon Hobson wrote:
> Eric Helm wrote:
>> Is it possible to have multiple option tftp-server-name or next-server
>> for a single pool? I have a need to specify redundant tftp servers for
>> booting the clients. If the first server is down, use the second.
> No, the server field is defined to be a single address/path.
> The only thing I can think of might be to use failover, have each 
> server give out it's own address as the TFTP server, and run some 
> sort of monitoring that turns off the dhcp service if the tftp 
> service is down. Actually, the tftp servers don't have to be on the 
> same boxes as the dhcp servers as long as you can tie together "no 
> tftp server' = "no dhcp server offering it as a boot server".
> You could probably manage something similar with DNS. The client is 
> booting so will not have a cache of recent requests - so if you can 
> arrange for the dns to only resolve a fqdn to addresse(s) with 
> working tftp servers it would also achieve what you want.
> Otherwise, you'll have to look as some form of high-availability stuff.

Thanks, I think for now I'm gonna see how the 'use failover and each
server give out its own address for TFTP' option works.
Has anyone attempted to use anycast for TFTP services? How about anycast
for DHCP services?


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