X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/73834922ffa1b7d4f36393cdfe228e3f1825ed18..0f22007377e186b9a16839c31156190d378fcffc:/Docs/manual.html?ds=sidebyside
diff --git a/Docs/manual.html b/Docs/manual.html
index 4db3a83..a857d9b 100644
--- a/Docs/manual.html
+++ b/Docs/manual.html
@@ -56,6 +56,7 @@ H3 {
Filtering
Clustering
Routing
+ Avoiding Fragmentation
Performance
@@ -1030,6 +1031,22 @@ ibgp" for IBGP. If this is not supported by your IOS revision, you
can use "maximum-paths" (which works for EBGP) and set
as_number to a private value such as 64512.
+
Avoiding Fragmentation
+
+Fragmentation of encapsulated return packets to the LAC may be avoided
+for TCP sessions by adding a firewall rule to clamps the MSS on
+outgoing SYN packets.
+
+The following is appropriate for interfaces with a typical MTU of
+1500:
+
+
+iptables -A FORWARD -i tun+ -o eth0 \
+ -p tcp --tcp-flags SYN,RST SYN \
+ -m tcpmss --mss 1413:1600 \
+ -j TCPMSS --set-mss 1412
+
+
Performance is great.