netdev - increase the number of routing tables

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Message-ID: <CANj2EbfR0cBaBd+t1yCZyErRpVzSC00DZohvtyazK8_9bv2aEQ@mail.gmail.com>
Date:	Sat, 28 Jan 2012 21:20:42 -0500
From:	Simon Chen <simonchennj@...il.com>
To:	netdev@...r.kernel.org
Subject: increase the number of routing tables

Hey folks,

To my limited knowledge, Linux currently supports 256 (255?) routing
tables defined in /etc/iproute2/rt_tables.

Is there a way to increase this number to something much larger? Are
there performance/scalability concerns there? I am trying to have
customized routing table for each IP address (using "ip rule add from
xxx table yyy"). I am not sure exactly how many IPs I'll handle, but
certainly more than 255...

Thanks.
-Simon
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