* murthy kn <[EMAIL PROTECTED]> [011117 10:54] wrote:
> Hello,
>
> 1. Is there any sysctl variable to control the number of
> duplicate acks after which the sending TCP gets into a fast
> retransmit mode?
No, but you can add one like so (i think):
Index: tcp_input.c
===================================================================
RCS file: /home/ncvs/src/sys/netinet/tcp_input.c,v
retrieving revision 1.141
diff -u -r1.141 tcp_input.c
--- tcp_input.c 12 Sep 2001 08:37:54 -0000 1.141
+++ tcp_input.c 18 Nov 2001 00:09:51 -0000
@@ -101,6 +101,9 @@
MALLOC_DEFINE(M_TSEGQ, "tseg_qent", "TCP segment queue entry");
static int tcprexmtthresh = 3;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, rexmtthresh, CTLFLAG_RW,
+ &tcprexmtthresh, 0, "Max duplicate acks before fast rexmit");
+
tcp_cc tcp_ccgen;
struct tcpstat tcpstat;
> 2. If I have a switch that does not support any port aggregation,
> and it is connected to a BSD machine with 2 ethernet NICs that have
> identical MAC, will the switch forward *each* packet destined to the BSD
> machine to both of the NICs.
>
> 3. Apart from using tcpdump, are there any other tools/ways to analyze the
> dynamic behaviour of a BSD stack - like knowing when there have
> been retransmits, the state of various buffers in the stack etc.
netstat.
--
-Alfred Perlstein [[EMAIL PROTECTED]]
'Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.'
http://www.morons.org/rants/gpl-harmful.php3
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