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diff --git a/docs/configuration/interfaces/dummy.rst b/docs/configuration/interfaces/dummy.rst new file mode 100644 index 00000000..c9845230 --- /dev/null +++ b/docs/configuration/interfaces/dummy.rst @@ -0,0 +1,79 @@ +.. _dummy-interface: + +##### +Dummy +##### + +The dummy interface is really a little exotic, but rather useful nevertheless. +Dummy interfaces are much like the :ref:`loopback-interface` interface, except +you can have as many as you want. + +.. note:: Dummy interfaces can be used as interfaces that always stay up (in + the same fashion to loopbacks in Cisco IOS), or for testing purposes. + +.. hint:: A Dummy interface is always up, thus it could be used for + management traffic or as source/destination for and :abbr:`IGP (Interior + Gateway Protocol)` like :ref:`bgp` so your internal BGP link is not dependent + on physical link states and multiple routes can be chosen to the + destination. A :ref:`dummy-interface` Interface should always be preferred + over a :ref:`loopback-interface` interface. + +************* +Configuration +************* + +Common interface configuration +============================== + +.. cmdinclude:: /_include/interface-address.txt + :var0: dummy + :var1: dum0 + +.. cmdinclude:: /_include/interface-description.txt + :var0: dummy + :var1: dum0 + +.. cmdinclude:: /_include/interface-disable.txt + :var0: dummy + :var1: dum0 + +.. cmdinclude:: /_include/interface-vrf.txt + :var0: dummy + :var1: dum0 + +********* +Operation +********* + +.. opcmd:: show interfaces dummy + + Show brief interface information.information + + .. code-block:: none + + vyos@vyos:~$ show interfaces dummy + Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down + Interface IP Address S/L Description + --------- ---------- --- ----------- + dum0 172.18.254.201/32 u/u + +.. opcmd:: show interfaces dummy <interface> + + Show detailed information on given `<interface>` + + .. code-block:: none + + vyos@vyos:~$ show interfaces ethernet eth0 + dum0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 + link/ether 26:7c:8e:bc:fc:f5 brd ff:ff:ff:ff:ff:ff + inet 172.18.254.201/32 scope global dum0 + valid_lft forever preferred_lft forever + inet6 fe80::247c:8eff:febc:fcf5/64 scope link + valid_lft forever preferred_lft forever + + RX: bytes packets errors dropped overrun mcast + 0 0 0 0 0 0 + TX: bytes packets errors dropped carrier collisions + 1369707 4267 0 0 0 0 + + |