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-rw-r--r--doc/zebra.812
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/zebra.8 b/doc/zebra.8
index 8f830152..25cbb363 100644
--- a/doc/zebra.8
+++ b/doc/zebra.8
@@ -71,6 +71,18 @@ name at the moment. Default is \fIquagga\fR.
\fB\-r\fR, \fB\-\-retain\fR
When the program terminates, retain routes added by \fBzebra\fR.
.TP
+\fB\-s\fR, \fB\-\-nl-bufsize \fR\fInetlink-buffer-size\fR
+Set netlink receive buffer size. There are cases where zebra daemon can't
+handle flood of netlink messages from kernel. If you ever see "recvmsg overrun"
+messages in zebra log, you are in trouble.
+
+Solution is to increase receive buffer of netlink socket. Note that kernel
+doesn't allow to increase it over maximum value defined in
+\fI/proc/sys/net/core/rmem_max\fR. If you want to do it, you have to increase
+maximum before starting zebra.
+
+Note that this affects Linux only.
+.TP
\fB\-v\fR, \fB\-\-version\fR
Print the version and exit.
.SH FILES