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icmp.4: improve icmplim and add icmplim_jitter description

Browse source 
Reviewed by:		cc, bcr
Sponsored by:		Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D48025

(cherry picked from commit eba715c544ea89c6b402c55e03b388b77030b997)
This commit is contained in:
Michael Tuexen 2024-12-11 19:47:11 +01:00
parent 08398b84ef
commit c8bd4684eb
1 changed files with 24 additions and 3 deletions
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27
share/man/man4/icmp.4
View file

@ -27,7 +27,7 @@
.\"
.\" @(#)icmp.4 8.1 (Berkeley) 6/5/93
.\"
.Dd August 1, 2022
.Dd December 11, 2024
.Dt ICMP 4
.Os
.Sh NAME
@ -171,10 +171,31 @@ Defaults to false.
Enable/disable dropping of ICMP Redirect packets.
Defaults to false.
.It Va icmplim
.Pq Vt integer
Bandwidth limit for ICMP replies in packets/second.
.Pq Vt unsigned integer
Mean rate limit for replies in packets/second.
The actual limit is
.Va icmplim
plus a random jitter limited by
.Va icmplim_jitter .
If set to zero, no limiting will occur.
Defaults to 200.
.It Va icmplim_jitter
.Pq Vt unsigned integer
A random jitter between the negative of
.Va icmplim_jitter
and
.Va icmplim_jitter
is applied to
.Va icmplim
for limiting the sending rate of replies.
.Va icmplim_jitter
must be smaller than
.Va icmplim ,
if
.Va icmplim
is not zero.
If set to zero, no jitter will be applied.
Defaults to 16.
.It Va icmplim_output
.Pq Vt boolean
Enable/disable logging of ICMP replies bandwidth limiting.