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73 lines
2.9 KiB
Plaintext
73 lines
2.9 KiB
Plaintext
.. cfgcmd:: set interfaces {{ var0 }} <interface> {{ var2 }} {{ var3 }}
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{{ var5 }} {{ var6 }} ipv6 address autoconf
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:abbr:`SLAAC (Stateless Address Autoconfiguration)` :rfc:`4862`. IPv6 hosts
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can configure themselves automatically when connected to an IPv6 network using
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the Neighbor Discovery Protocol via :abbr:`ICMPv6 (Internet Control Message
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Protocol version 6)` router discovery messages. When first connected to a
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network, a host sends a link-local router solicitation multicast request for
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its configuration parameters; routers respond to such a request with a router
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advertisement packet that contains Internet Layer configuration parameters.
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.. note:: This method automatically disables IPv6 traffic forwarding on the
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interface in question.
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Example:
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.. code-block:: none
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set interfaces {{ var0 }} {{ var1 }} {{ var2 }} {{ var4 }} {{ var5 }} {{ var7 }} ipv6 address autoconf
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.. cfgcmd:: set interfaces {{ var0 }} <interface> {{ var2 }} {{ var3 }}
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{{ var5 }} {{ var6 }} ipv6 address eui64 <prefix>
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:abbr:`EUI-64 (64-Bit Extended Unique Identifier)` as specified in
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:rfc:`4291` allows a host to assign iteslf a unique 64-Bit IPv6 address.
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Example:
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.. code-block:: none
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set interfaces {{ var0 }} {{ var1 }} {{ var2 }} {{ var4 }} {{ var5 }} {{ var7 }} ipv6 address eui64 2001:db8:beef::/64
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.. cfgcmd:: set interfaces {{ var0 }} <interface> {{ var2 }} {{ var3 }}
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{{ var5 }} {{ var6 }} ipv6 address no-default-link-local
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Do not assign a link-local IPv6 address to this interface.
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Example:
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.. code-block:: none
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set interfaces {{ var0 }} {{ var1 }} {{ var2 }} {{ var4 }} {{ var5 }} {{ var7 }} ipv6 address no-default-link-local
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.. cfgcmd:: set interfaces {{ var0 }} <interface> {{ var2 }} {{ var3 }}
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{{ var5 }} {{ var6 }} ipv6 disable-forwarding
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Configure interface-specific Host/Router behaviour. If set, the interface will
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switch to host mode and IPv6 forwarding will be disabled on this interface.
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Example:
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.. code-block:: none
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set interfaces {{ var0 }} {{ var1 }} {{ var2 }} {{ var4 }} {{ var5 }} {{ var7 }} ipv6 disable-forwarding
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.. cfgcmd:: set interfaces {{ var0 }} <interface> {{ var2 }} {{ var3 }}
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{{ var5 }} {{ var6 }} ipv6 adjust-mss <mss | clamp-mss-to-pmtu>
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As Internet wide PMTU discovery rarely works, we sometimes need to clamp our
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TCP MSS value to a specific value. This is a field in the TCP options part of
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a SYN packet. By setting the MSS value, you are telling the remote side
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unequivocally 'do not try to send me packets bigger than this value'.
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.. note:: This command was introduced in VyOS 1.4 - it was previously called:
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``set firewall options interface <name> adjust-mss6 <value>``
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.. hint:: MSS value = MTU - 40 (IPv6 header) - 20 (TCP header), resulting in
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1432 bytes on a 1492 byte MTU.
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Instead of a numerical MSS value `clamp-mss-to-pmtu` can be used to
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automatically set the proper value.
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