NFD FIB Management Protocol¶

The FIB management protocol allows an entity to manipulate the FIB entry.

This protocol supports four operations:

• add a nexthop to a FIB entry
• remove a nexthop from a FIB entry
• set the forwarding strategy for a namespace

Command format¶

The FIB management protocol uses Interest-Data exchange.
The command request and response formats are specified in NFD Control Command specification.

Add a nexthop¶

prefixreg command adds a nexthop to a FIB entry,
or updates its cost if it already exists.

The command verb is prefixreg.
Request Interest must be signed.

The request options have the following format:

PrefixRegOptions ::= PREFIX-REG-OPTIONS-TYPE TLV-LENGTH
                       Name
                       FaceId
                       Cost
                       ForwardingFlags?

FaceId           ::= FACEID-TYPE TLV-LENGTH
                       nonNegativeInteger

Cost             ::= COST-TYPE TLV-LENGTH
                       nonNegativeInteger

ForwardingFlags  ::= FORWARDING-FLAGS-TYPE TLV-LENGTH
                       nonNegativeInteger

FaceId is the FaceId returned in NFD Face Management protocol.
If FaceId is set to zero, it is implied as the face of the entity sending this command.

The default value of Cost is zero.

The value of ForwardingFlags will be defined later.

The response has StatusCode 200 if the command succeeds.

Remove a nexthop¶

prefixunreg command removes a nexthop from a FIB entry.

The command verb is prefixunreg.
Request Interest must be signed.

The request options have the following format:

PrefixUnregOptions ::= PREFIX-UNREG-OPTIONS-TYPE TLV-LENGTH
                         Name
                         FaceId

The response has StatusCode 200 if the command succeeds.

If the specified nexthop does not exist on the FIB entry, this command does nothing,
but is still considered successful.

Set strategy¶

prefixstrategy command picks a forwarding strategy for a namespace.

The format of this command will be defined in a later version of this spec.

TLV-TYPE assignments¶