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+.. _srv6_localsid_doc:
+
+SR LocalSIDs
+============
+
+A local SID is associated to a Segment Routing behavior -or function- on
+the current node.
+
+The most basic behavior is called END. It simply activates the next SID
+in the current packet, by decrementing the Segments Left value and
+updating the IPv6 DA.
+
+A local END SID is instantiated using the following CLI:
+
+::
+
+   sr localsid (del) address XX::YY behavior end
+
+This creates a new entry in the main FIB for IPv6 address XX::YY. All
+packets whose IPv6 DA matches this FIB entry are redirected to the
+sr-localsid node, where they are processed as described above.
+
+Other examples of local SIDs are the following:
+
+::
+
+   sr localsid (del) address XX::YY behavior end
+   sr localsid (del) address XX::YY behavior end.x GE0/1/0 2001::a
+   sr localsid (del) address XX::YY behavior end.dx6 GE0/1/0 2001::a
+   sr localsid (del) address XX::YY behavior end.dx4 GE0/1/0 10.0.0.1
+   sr localsid (del) address XX::YY behavior end.dx2 GigabitE0/11/0
+   sr localsid (del) address XX::YY behavior end.dt6 5
+   sr localsid (del) address XX::YY behavior end.dt6 5
+
+Note that all of these behaviors match the definitions of the SRv6
+architecture (*draft-filsfils-spring-srv6-network-programming*). Please
+refer to this document for a detailed description of each behavior.
+
+Note also that you can configure the PSP flavor of the End and End.X
+behaviors by typing:
+
+::
+
+   sr localsid (del) address XX::YY behavior end psp
+   sr localsid (del) address XX::YY behavior end.x GE0/1/0 2001::a psp
+
+Help on the available local SID behaviors and their usage can be
+obtained with:
+
+::
+
+   help sr localsid
+
+Alternatively they can be obtained using.
+
+::
+
+   show sr localsids behavior
+
+The difference in between those two commands is that the first one will
+only display the SR LocalSID behaviors that are built-in VPP, while the
+latter will display those behaviors plus the ones added with the SR
+LocalSID Development Framework.
+
+VPP keeps a ‘My LocalSID Table’ where it stores all the SR local SIDs
+instantiated as well as their parameters. Every time a new local SID is
+instantiated, a new entry is added to this table. In addition, counters
+for correctly and incorrectly processed traffic are maintained for each
+local SID. The counters store both the number of packets and bytes.
+
+The contents of the ‘My LocalSID Table’ is shown with:
+
+::
+
+   vpp# show sr localsid
+   SRv6 - My LocalSID Table:
+   =========================
+           Address:        c3::1
+           Behavior:       DX6 (Endpoint with decapsulation and IPv6 cross-connect)
+           Iface:          GigabitEthernet0/5/0
+           Next hop:       b:c3::b
+           Good traffic:   [51277 packets : 5332808 bytes]
+           Bad traffic:    [0 packets : 0 bytes]
+   --------------------
+
+The traffic counters can be reset with:
+
+::
+
+   vpp# clear sr localsid-counters