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Re: icmp-redirects, hung connection, tcpdump

To: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: icmp-redirects, hung connection, tcpdump
Cc: Joseph Mack <mack@xxxxxxxxxxx>, "Justin M. Mahoney" <justin@xxxxxxxxxxxxxxxxxxxx>, <michael_e_brown@xxxxxxxxxxxxxxxxx>
From: Michael E Brown <michael_e_brown@xxxxxxxx>
Date: Fri, 12 Jan 2001 12:59:47 -0600 (CST)
On Fri, 12 Jan 2001, Julian Anastasov wrote:
>
>       Yes, if all/send_redirects is 1 every <device>/send_redirects
> is ignored. So, if we leave it 1 redirects are sent. To stop them we
> need all=0 && <device>=0. default/send_redirects is the value that will
> be inherited from each new interface that is created.


How about a patch to the HOWTO? This way, the unwary cannot get into
trouble...

--- LVS-HOWTO-991205    Thu Jan 11 16:31:25 2001
+++ LVS-HOWTO-MEB       Fri Jan 12 12:58:01 2001
@@ -9,6 +9,7 @@
 v0.7 1 Dec 99, fixes to "arp problem" write up
                 (no updates needed for LVS v0.9.5, 29Nov99 release)
 v0.8 3 Dec 99, Horms' method added for VS-DR
+v0.8.1  12 Jan 01 mebrown added info for conf/all/send_redirects

 comments/feedback/fixes/contributions to Joe

@@ -4875,6 +4876,8 @@
 The configure.pl script turns off icmp redirects on the director
 using sysctl

+    echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects
+    echo 0 > /proc/sys/net/ipv4/conf/default/send_redirects
     echo 0 > /proc/sys/net/ipv4/conf/eth0/send_redirects
 )





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