[i2rs] RIB Info/Data model questions: nexthop-id

["Jeffrey (Zhaohui) Zhang" <[e-mail]>]

Hi,

Both the RIB info and data model mentions nexthop-id, but neither specifies who manages/assigns the ID. Can the specs point that out?

It seems that it could be both ways - the IDs could be allocated by routers (servers) or could be allocated by clients. Different ID spaces would be used depending on who allocates the IDs.

Related to the above, a specific question on the data model:

  grouping nexthop {
    leaf nexthop-id {
      mandatory true;
      type uint32;
    }
    choice nexthop-type {
       ...
       case nexthop-protection {
        list nexthop-protection-list {
            key "nexthop-protection-id"; 
            leaf nexthop-protection-id {
              mandatory true;
              type uint32;
            }
           leaf nexthop-preference {
             ...
           }
           leaf nexthop {
             mandatory true;
             type nexthop-ref;
           }
        }
      }

Here a nexthop-protection is a list. Being a list it requires a key and we defined this uint32 nexthop-protection-id, which I assume the controller needs to assign and both the controller and the router needs to remember. The list entry has a member "nexthop" which is a nexthop-ref, which is a nexthop-id:

  typedef nexthop-ref {
    type leafref {
      path  "/i2rs-rib:routing-instance/i2rs-rib:rib-list" +
            "/i2rs-rib:route-list/i2rs-rib:nexthop/i2rs-rib:nexthop-id";
    }
  }

So - why can't we use the nexthop-id itself as the key?

Thanks.

Jeffrey