SHARP is a daemon that provides miscellaneous functionality used for testing FRR and creating proof-of-concept labs.

Starting SHARP

Default configuration file for sharpd is sharpd.conf. The typical location of sharpd.conf is /etc/frr/sharpd.conf.

If the user is using integrated config, then sharpd.conf need not be present and the frr.conf is read instead.

SHARP supports all the common FRR daemon start options which are documented elsewhere.


All sharp commands are under the enable node and preceded by the sharp keyword. At present, no sharp commands will be preserved in the config.

sharp install routes A.B.C.D <nexthop <E.F.G.H|X:X::X:X>|nexthop-group NAME> (1-1000000) [instance (0-255)] [repeat (2-1000)]

Install up to 1,000,000 (one million) /32 routes starting at A.B.C.D with specified nexthop E.F.G.H or X:X::X:X. The nexthop is a NEXTHOP_TYPE_IPV4 or NEXTHOP_TYPE_IPV6 and must be reachable to be installed into the kernel. Alternatively a nexthop-group NAME can be specified and used as the nexthops. The routes are installed into zebra as ZEBRA_ROUTE_SHARP and can be used as part of a normal route redistribution. Route installation time is noted in the debug log. When zebra successfully installs a route into the kernel and SHARP receives success notifications for all routes this is logged as well. Instance (0-255) if specified causes the routes to be installed in a different instance. If repeat is used then we will install/uninstall the routes the number of times specified.

sharp remove routes A.B.C.D (1-1000000)

Remove up to 1,000,000 (one million) /32 routes starting at A.B.C.D. The routes are removed from zebra. Route deletion start is noted in the debug log and when all routes have been successfully deleted the debug log will be updated with this information as well.

sharp data route

Allow end user doing route install and deletion to get timing information from the vty or vtysh instead of having to read the log file. This command is informational only and you should look at sharp_vty.c for explanation of the output as that it may change.

sharp label <ipv4|ipv6> vrf NAME label (0-1000000)

Install a label into the kernel that causes the specified vrf NAME table to be used for pop and forward operations when the specified label is seen.

[no] sharp watch <nexthop <A.B.C.D|X:X::X:X>|import <A.B.C.D/M:X:X::X:X/M> [connected]

Instruct zebra to monitor and notify sharp when the specified nexthop is changed. The notification from zebra is written into the debug log. The nexthop or import choice chooses the type of nexthop we are asking zebra to watch for us. This choice affects zebra’s decision on what matches. Connected tells zebra whether or not that we want the route matched against to be a static or connected route for the nexthop keyword, for the import keyword connected means exact match. The no form of the command obviously turns this watching off.

sharp data nexthop

Allow end user to dump associated data with the nexthop tracking that may have been turned on.

sharp lsp [update] (0-100000) nexthop-group NAME [prefix A.B.C.D/M TYPE [instance (0-255)]]

Install an LSP using the specified in-label, with nexthops as listed in nexthop-group NAME. If update is included, the update path is used. The LSP is installed as type ZEBRA_LSP_SHARP. If prefix is specified, an existing route with type TYPE (and optional instance id) will be updated to use the LSP.

sharp remove lsp (0-100000) nexthop-group NAME [prefix A.B.C.D/M TYPE [instance (0-255)]]

Remove a SHARPD LSP that uses the specified in-label, where the nexthops are specified in nexthop-group NAME. If prefix is specified, remove label bindings from the route of type TYPE also.

sharp send opaque type (1-255) (1-1000)

Send opaque ZAPI messages with subtype type. Sharpd will send a stream of messages if the count is greater than one.

sharp send opaque unicast type (1-255) $proto_str [{instance (0-1000) | session (1-1000)}] (1-1000)

Send unicast opaque ZAPI messages with subtype type. The protocol, instance, and session_id identify a single target zapi client. Sharpd will send a stream of messages if the count is greater than one.

sharp send opaque <reg | unreg> $proto_str [{instance (0-1000) | session (1-1000)}] type (1-1000)

Send opaque ZAPI registration and unregistration messages for a single subtype. The messages must specify a protocol daemon by name, and can include optional zapi instance and session values.

sharp create session (1-1024)

Create an additional zapi client session for testing, using the specified session id.

sharp remove session (1-1024)

Remove a test zapi client session that was created with the specified session id.

sharp neigh discover [vrf NAME] <A.B.C.D|X:X::X:X> IFNAME

Send an ARP/NDP request to trigger the addition of a neighbor in the ARP table.