Tuning routing table size in FreeBSD 8.0 and 7.2

Nikos Vassiliadis nvass at gmx.com
Thu Feb 24 16:42:09 UTC 2011

On 2/24/2011 4:51 PM, Damien Fleuriot wrote:
> On 2/24/11 3:00 PM, nikitha wrote:
>> Hi,
>> Could you plz share the information on the maximum number of routes that can
>> be added (by default) in FREEBSD 8.0/7.2 kernel?
>> In Linux the sysctl rt_max_size is used. Is there a similar tunable
>> parameter in freeBSD?
> I could not find a sysctl that matched what you're looking for.
> AFAIK, the routing table is limited only by the amount of RAM you can
> allocate to it.

Yes. You can use "vmstat -z | grep rtentry" to examine it.
It seems trivial to add a limit there(without having thought of
multiple routing tables and vnet).

Out of curiosity, why would you want such a limit?

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