Hi, The paragraph: "In the context of this document, an OSPF instance is a separate protocol instance complete with its own protocol data structures (e.g., areas, interfaces, neighbors), link state database, protocol state machines, and protocol processes (e.g. SPF calculation)."
but in the rest of the document it says that the instance ID has local link significance only and it solely affects the reception of the packets. It can also be used to have one link in more then one area. Also: "Additionally, an instance ID may be configured for virtual links from different protocol instances in order to utilize the same transit area (without requiring different router IDs for demultiplexing)." Lets look at these situations here. There are three OSPF processes running on a system: OSPF instance A : interface-1 inst-ID 10 interface-2 inst-ID 20 OSPF instance B : interface-1 inst-ID 11 interface-2 inst-ID 21 interface-3 inst-ID 31 OSPF instance C : interface-1 inst-ID 12 Area 1 interface-1 inst-ID 13 Area 2 - If the instance ID has local link significance only then all the above configurations should be valid.(??) - But, if the instance ID means that the SPF will be run only on the packets with the same instance ID, essentially mandating that one ospf process(instance) should really have all the interfaces in it assigned the same instance ID, then these configs are invalid. In this case, the same interface can not be used in more then one area of the same instance. What are your views? thanks, Manoj ============================================================ The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any reproduction, dissemination or distribution of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. Tellabs ============================================================ _______________________________________________ OSPF mailing list [email protected] https://www1.ietf.org/mailman/listinfo/ospf
