Persistent DUID for Client

Simon Hobson dhcp1 at
Fri May 25 11:15:53 UTC 2012

rahul shukla wrote:

>So I believe LLT DUID should be generated once and stored somewhere. 
>That should persists across the power cycles also.

Correct, it must be generated once and stored in persistent storage. 
If you cannot use persistent storage for any reason (quite rare these 
days), then you must use a different identifier such as DUID-LL.

>Issue 2). If I specify a 'dhcp-client-identifier' in dhclient.conf, 
>that ID is also not taking effect. In what circumstances this ID 
>will be used?

I suspect this is an IPv4 only option, it's replaced by DUID in IPv6.

Simon Hobson

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