Question about Linux routing - ip_route_output_key vs fib

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Subject:	Question about Linux routing - ip_route_output_key vs fib_lookup
From:	Megh Bhatt <megh.bhatt@xxxxxxxxx>
Date:	Wed, 16 Feb 2005 12:35:57 -0500
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Reply-to:	Megh Bhatt <megh.bhatt@xxxxxxxxx>
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Hi,
I had a question about Linux routing functions, suppose I want to find
out what interface does a route to an IP address belong to - is it
better (in terms of performance) to use ip_route_output_key or
fib_lookup. My initial guess from looking at the source code is
fib_lookup since the routing cache wont be helpful since I wont have
any interface information (rather want to find out interface
information) but wanted to be sure. Thanks.

Megh

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Question about Linux routing - ip_route_output_key vs fib_lookup