- Griffin T
- Shepherd F
- Wilfong G

IEEE/ACM Transactions on Networking (2002) 10(2) 232-243

- 72Mendeley users who have this article in their library.
- 313Citations of this article.

Dynamic routing protocols such as RIP and OSPF essentially

implement distributed algorithms for solving the shortest paths problem.

The border gateway protocol (BGP) is currently the only interdomain

routing protocol deployed in the Internet. BGP does not solve a shortest

paths problem since any interdomain protocol is required to allow

policy-based metrics to override distance-based metrics and enable

autonomous systems to independently define their routing policies with

little or no global coordination. It is then natural to ask if BGP can

be viewed as a distributed algorithm for solving some fundamental

problem. We introduce the stable paths problem and show that BGP can be

viewed as a distributed algorithm for solving this problem. Unlike a

shortest path tree, such a solution does not represent a global optimum,

but rather an equilibrium point in which each node is assigned its local

optimum. We study the stable paths problem using a derived structure

called a dispute wheel, representing conflicting routing policies at

various nodes. We show that if no dispute wheel can be constructed, then

there exists a unique solution for the stable paths problem. We define

the simple path vector protocol (SPVP), a distributed algorithm for

solving the stable paths problem. SPVP is intended to capture the

dynamic behavior of BGP at an abstract level. If SPVP converges, then

the resulting state corresponds to a stable paths solution. If there is

no solution, then SPVP always diverges. In fact, SPVP can even diverge

when a solution exists. We show that SPVP will converge to the unique

solution of an instance of the stable paths problem if no dispute wheel

exists

- BGP
- Border gateway protocol
- Interdomain routing
- Internet routing
- Path vector protocols
- Stable routing

Mendeley saves you time finding and organizing research

Sign up here

Already have an account ?Sign in

Choose a citation style from the tabs below