ICMP Rate Limit - Solaris 6

[rmmagow]

I was told Solaris 6 has some kernel setting to limit the amount of ICMP (ping) traffic flowing through it. Has anyone heard of this too and does anyone know which kernel setting I can change to turn this off?

Thanks Much.

 

[Annihilannic]

It looks like these are the ICMP tunables available (obtained using ndd):

icmp_wroff_extra: 32
icmp_ipv4_ttl: 255
icmp_ipv6_hoplimit: 60
icmp_bsd_compat: 1
icmp_xmit_hiwat: 8192
icmp_xmit_lowat: 1024
icmp_recv_hiwat: 8192
icmp_max_buf: 262144

I would guess the transmit and receive high and low water marks are the ones you want to adjust?

You could achieve that by adding entries in /etc/system such as:

[tt]set icmp:icmp_xmit_hiwat=1234[/tt]

...or by using ndd -set, although that would only persist until the next reboot.

Annihilannic.