[Infrastructures] DHCP for servers

[John Borwick]

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David A. Ulevitch wrote:
> On Jun 27, 2005, at 1:57 PM, John Borwick wrote:
> 
>>> David A. Ulevitch wrote:
>>> [..]
>>>
>>>> In fact, I may have read about some features in ISCs dhcpd that
>>>> specifically provide or complement some failover features but I can't
>>>> see to find it at the moment... man dhcpd I suppose. :)
>>>>
>>>
>>> Be prepared for edge cases in ISC dhcpd failover where the two servers
>>> negotiate for long periods of time--especially after hard reboots or
>>> after adding lots of zones.
> 
> 
> This is when using the "failover peer" configs in DHCPd?
> 
> What are the side effects of this?  Failure to assign IPs?

Our site is perhaps a special case, because we have over 800 failover
DHCP subnets, but yes.  The side effect of the servers "re-balancing"
their IP address pools is that no addresses get passed out.  You can
hack the server by editing the dhcp.leases file to change the state of
each server if you're in an emergency.

Yours,
John
-- 
           John Borwick
       Systems Analyst Lead
      Wake Forest University | web  http://www.wfu.edu/~borwicjh
      Winston-Salem, NC, USA | GPG key ID             0x797326D5

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