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+@node Zebra Protocol, Packet Binary Dump Format, SNMP Support, Top
+@comment node-name, next, previous, up
+@appendix Zebra Protocol
+
+Zebra Protocol is a protocol which is used between protocol daemon and
+zebra. Each protocol daemon sends selected routes to zebra daemon. Then
+zebra manages which route is installed into the forwarding table.
+
+Zebra Protocol is a TCP-based protocol. Below is common header of Zebra
+Protocol.
+
+@example
+@group
+0 1 2 3
+0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+| Length (2) | Command (1) |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+@end group
+@end example
+
+Length is total packet length including this header length. So minimum
+length is three. Command is Zebra Protocol command.
+
+@example
+ZEBRA_INTERFACE_ADD 1
+ZEBRA_INTERFACE_DELETE 2
+ZEBRA_INTERFACE_ADDRESS_ADD 3
+ZEBRA_INTERFACE_ADDRESS_DELETE 4
+ZEBRA_INTERFACE_UP 5
+ZEBRA_INTERFACE_DOWN 6
+ZEBRA_IPV4_ROUTE_ADD 7
+ZEBRA_IPV4_ROUTE_DELETE 8
+ZEBRA_IPV6_ROUTE_ADD 9
+ZEBRA_IPV6_ROUTE_DELETE 10
+ZEBRA_REDISTRIBUTE_ADD 11
+ZEBRA_REDISTRIBUTE_DELETE 12
+ZEBRA_REDISTRIBUTE_DEFAULT_ADD 13
+ZEBRA_REDISTRIBUTE_DEFAULT_DELETE 14
+ZEBRA_IPV4_NEXTHOP_LOOKUP 15
+ZEBRA_IPV6_NEXTHOP_LOOKUP 16
+@end example
+
+@example
+@group
+0 1 2 3
+0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+| Type | Flags |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+@end group
+@end example