DHCP server (version 4) with an alias IP address

[Steven Shiau]

On 2010年09月30日 15:02, Simon Hobson wrote:
> Steven Shiau wrote:
>
>> Is that possible to use an alias IP address to run the DHCP service 4?
>
> Yes.
>
>> We have been used dhcp3 service with this method for a long time, 
>> however, recently we switched to 4.1 or 4.2, and we hit an issue that 
>> the dhcpd always complains "No subnet declaration for eth0 (...)"
>
> Which is correct - you are missing a declaration for it. You need a 
> shared network declaration, and a declaration for the other subnet :
>
> shared-subnet "some-identifier" {
>   subnet 192.168.100.0 netmask 255.255.255.0 {
>     option subnet-mask  255.255.255.0;
>     option routers 192.168.100.254;
>     next-server 192.168.100.254;
>
>     pool {
>       range 192.168.100.1 192.168.100.3;
>     }
>   }
>   subnet 192.168.120.0 netmask 255.255.255.0 {
>   }
> }
>
> Note. In this case shared-network is correct because 192.168.100.0/24 
> and 192.168.120.0/24 are both on the same broadcast domain. Not to be 
> confused with VLANs etc.
>
Cool! Thanks!

Steven.

-- 
Steven Shiau<steven _at_ nchc org tw>  <steven _at_ stevenshiau org>
National Center for High-performance Computing, Taiwan. http://www.nchc.org.tw
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