Re: Highest IP Address

[Paul Wells <pauwells at CISCO.COM>]

Hi Bhartendu,

For DR election I believe the choice was arbitrary.  There just had to 
be a rule that all implementations would apply consistently.  The same 
logic applies to other cases like choosing the highest router ID as the 
NSSA translator.

Choosing a default value for the router ID (or not) is an implementation 
issue, not part of the protocol.  Different vendors are free to use 
other methods.  The important thing is that the router IDs are unique.

Regards,
Paul

Bhartendu M wrote:
> Hi All,
>
> I am curious to know the logic behind -
>
> Why always HIGHEST IP Address is selected for a tie break like in
> 1. DR election process in OSPF
> 2. Default router-id in OSPF 
>
> Is there any advantage using highest IP address over lowest IP address?
> Is this a covention or any logic behind this?
>
> Thanks & Regards
> Bhartendu M.