From 83f983ceef5ff683ac25855d6dfae96a6af1d05d Mon Sep 17 00:00:00 2001 From: Markus Bukowski Date: Sat, 15 Jan 2022 13:09:43 +0100 Subject: Add clamp-mss-to-pmtu option and description ipv6 --- docs/_include/interface-ipv6.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'docs/_include/interface-ipv6.txt') diff --git a/docs/_include/interface-ipv6.txt b/docs/_include/interface-ipv6.txt index d1ed8837..eb60b4e8 100644 --- a/docs/_include/interface-ipv6.txt +++ b/docs/_include/interface-ipv6.txt @@ -55,7 +55,7 @@ set interfaces {{ var0 }} {{ var1 }} {{ var2 }} {{ var4 }} {{ var5 }} {{ var7 }} ipv6 disable-forwarding .. cfgcmd:: set interfaces {{ var0 }} {{ var2 }} {{ var3 }} - {{ var5 }} {{ var6 }} ipv6 adjust-mss + {{ var5 }} {{ var6 }} ipv6 adjust-mss As Internet wide PMTU discovery rarely works, we sometimes need to clamp our TCP MSS value to a specific value. This is a field in the TCP options part of @@ -67,3 +67,6 @@ .. hint:: MSS value = MTU - 40 (IPv6 header) - 20 (TCP header), resulting in 1432 bytes on a 1492 byte MTU. + + Instead of a numerical MSS value `clamp-mss-to-pmtu` can be used to + automatically set the proper value. -- cgit v1.2.3