diff options
| author | Susant Sahani <ssahani@users.noreply.github.com> | 2016-04-21 06:04:13 +0530 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2016-04-20 20:34:13 -0400 |
| commit | 439689c6ec48faba67565562d75701d5736567e7 (patch) | |
| tree | 7970f3f89b0a1331b53917f5869e41fefc9b0ef9 /man | |
| parent | f15ab461ec10cb0164b9e6110957012d052415ea (diff) | |
networkd: bump MTU to 1280 for interfaces which have IPv6 enabled (#3077)
IPv6 protocol requires a minimum MTU of 1280 bytes on the interface.
This fixes #3046.
Introduce helper link_ipv6_enabled() to figure out whether IPV6 is enabled.
Introduce network_has_static_ipv6_addresses() to find out if any static
ipv6 address configured.
If IPv6 is not configured on any interface that is SLAAC, DHCPv6 and static
IPv6 addresses not configured, then IPv6 will be automatically disabled for that
interface, that is we write "1" to /proc/sys/net/ipv6/conf//disable_ipv6.
Diffstat (limited to 'man')
| -rw-r--r-- | man/systemd.network.xml | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/man/systemd.network.xml b/man/systemd.network.xml index d7947836e9..8ae384185d 100644 --- a/man/systemd.network.xml +++ b/man/systemd.network.xml @@ -202,6 +202,8 @@ <para>The maximum transmission unit in bytes to set for the device. The usual suffixes K, M, G, are supported and are understood to the base of 1024.</para> + <para>Note that if IPv6 is enabled on the interface, and the MTU is chosen + below 1280 (the minimum MTU for IPv6) it will automatically be increased to this value.</para> </listitem> </varlistentry> <varlistentry> @@ -210,6 +212,15 @@ <para>Identity Association Identifier for the interface, a 32-bit unsigned integer.</para> </listitem> </varlistentry> + <varlistentry> + <listitem> + <para>Note that an interface without any static IPv6 addresses configured, and neither + DHCPv6 nor IPv6LL enabled, shall be considered to have no IPv6 support. IPv6 will be + automatically disabled for that interface by writing "1" to + <filename>/proc/sys/net/ipv6/conf/<replaceable>ifname</replaceable>/disable_ipv6.</filename> + </para> + </listitem> + </varlistentry> </variablelist> </refsect1> |