Have a question about RIB grammar

Based on the description
interface-list: This represents the list of interfaces associated
      with this routing instance.  The interface list helps constrain
      the boundaries of packet forwarding.  Packets coming on these
      interfaces are directly associated with the given routing
      instance.  The interface list contains a list of identifiers, with
      each identifier uniquely identifying an interface.
So based on this description, example grammar for Interface list is clear
   <interface-list> ::= (<INTERFACE_IDENTIFIER> ...)

but then  interface route has interface and interface identifier
   <interface-route> ::= <INTERFACE> <INTERFACE_IDENTIFIER>
Could you please explain the difference between <INTERFACE> and 
<INTERFACE_IDENTIFIER>?  In section 2.3, there is an ingress interface match 
condition, but from the document would presume that <INTERFACE_IDENTIFIER> 
would be enough to identify the ingress interface for match condition?

Thanks

Dean

On Feb 18, 2014, at 3:13 PM, Nitin Bahadur <[email protected]> wrote:

>>> 
>>>> 
>>>> 3. Section 6
>>>> <route> ::= <match> <nexthop-list>
>>>>              [<route-attributes>]
>>>>              [<route-vendor-attributes>]
>>> 
> 
>>> Another attribute may be needed is the I2RS client identifier, since
>>> there will be multiple clients that may install route into the rib.
> 
> The client identifier should be a part of the I2RS data protocol, rather
> than RIB model. Since the same client-id will be reusable across many
> other things (not just RIB). I guess we will closely monitor the status of
> the data protocol and can later figure out where to put the client-id. I
> agree that the client-id needs to go somewhere.
> 
> Thanks
> Nitin
> 
> 
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> 


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