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| author | Markus Bukowski <me@mrbuk.de> | 2022-01-15 13:09:43 +0100 |
|---|---|---|
| committer | Markus Bukowski <me@mrbuk.de> | 2022-01-15 13:09:43 +0100 |
| commit | 83f983ceef5ff683ac25855d6dfae96a6af1d05d (patch) | |
| tree | ca6d3a19ae67b2b0e20425f472c21e546a3d5cfe | |
| parent | 60bb01311c86fc689f13ce21a8a431ff068e3737 (diff) | |
| download | vyos-documentation-83f983ceef5ff683ac25855d6dfae96a6af1d05d.tar.gz vyos-documentation-83f983ceef5ff683ac25855d6dfae96a6af1d05d.zip | |
Add clamp-mss-to-pmtu option and description ipv6
| -rw-r--r-- | docs/_include/interface-ipv6.txt | 5 |
1 files changed, 4 insertions, 1 deletions
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 }} <interface> {{ var2 }} {{ var3 }} - {{ var5 }} {{ var6 }} ipv6 adjust-mss <mss> + {{ var5 }} {{ var6 }} ipv6 adjust-mss <mss | clamp-mss-to-pmtu> 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. |