Re: Routing 600+ vlan's via linux problems (looks like arp problems)

Paul Slootman
2007-05-04T14:27:14Z

Øyvind Vågen Jægtnes <lorrides@gmail.com> wrote:
>
>Yes, i was suspecting that the arp cache got full, but i will try
>increasing it :)
>Would there be any huge bugs if i change these lines in arp.c:
>
> .gc_thresh1 = 128,
> .gc_thresh2 = 512,
>
>to
>
> .gc_thresh1 = 700,
> .gc_thresh2 = 700,
>
>under the definition for struct arp_tbl?

Why not simply update the /proc/sys values?
No need to recompile the kernel.....
We have this in the /etc/sysctl.conf for our firewall:

net/ipv4/neigh/default/gc_thresh1=32768
net/ipv4/neigh/default/gc_thresh2=65536
net/ipv4/neigh/default/gc_thresh3=262144
net/ipv4/route/gc_elasticity=8
net/ipv4/route/gc_interval=30
net/ipv4/route/gc_min_interval=2

Paul Slootman