OSPF specification

Abstract

All OSPF protocol exchanges are authenticated. The OSPF packet header (see Section A.2) includes an authentication type field, and 64-bits of data used by the appropriate authentication scheme (determined by the type field). The authentication type is configurable on a per-area basis. Additional authentication data is configurable on a perinterface basis. For example, if an area uses a simple password scheme for authentication, a separate password may be configured for each network contained in the area. Authentication types of 0-255 are specified below. Other authentication types may be assigned locally on a per Autonomous System basis. E.1 Autype 0-No authentication Use of this authentication type means that routing exchanges in the area are not authenticated. The 64-bit field in the OSPF header can contain anything; it is not examined on packet reception. E.2 Autype 1-Simple password Using this authentication type, a 64-bit field is configured on a per-network basis. All packets sent on a particular network must have this configured value in their OSPF header 64-bit authentication field. This essentially serves as a "clear" 64-bit password. This guards against routers inadvertently coming up in the area. They must first be configured with their attached networks' passwords before they can join the routing domain. T6 An entry in the routing table has changed (see Section 11). The logging message produced should indicate the Destination type, Destination ID, and the old and new paths to the destination. The following logging messages may indicate that there is a network configuration error: Moy Page 97 RFC 1131 OSPF October 1989 delay between the two routers. This may be hard to estimate for a virtual link. It is better to err on the side of making it too large. "Router Priority" is not used on virtual links. A virtual link is defined by the following two configurable parameters: the Router ID of the virtual link's other endpoint, and the (non-backbone) area through which the virtual link runs (referred to as the virtual link's transit area). C.5 Non-broadcast, multi-access network parameters OSPF treats a non-broadcast, multi-access network much like it treats a broadcast network. Since there many be many routers attached to the network, a Designated Router is selected for the network. This Designated Router then originates a networks links advertisement, which lists all routers attached to the non-broadcast network. However, due to the lack of broadcast capabilities, it is necessary to use configuration parameters in the Designated Router selection. These parameters need only be configured in those routers that are themselves eligible to become Designated Router (i.e., those router's whose DR Priority for the network is non-zero): List of all other attached routers The list of all other routers attached to the non-broadcast network. Each router is listed by its IP interface address on the network. Also, for each router listed, that router's eligibility to become Designated Router must be defined. When an inter...

E6 Addressing Scheme and Network Architecture

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“…For non-active destinations in the network, a popular link state routing algorithm like OSPF2 [16,17] can do the route calculation. Because, in our routing scheme, each initiating active destination(server) takes charge of its route recomputations, the updating of routes to each active destination is uncorrelated.…”

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“…The admission control analyzes the available bandwidth to allow the selection of an MPR by a new node. They use HELLO Message format [32] with a willingness field, which indicates how willing a MN is to be a MPR point.…”