This paper proposes GIA, a scalable architecture for global IP-anycast. Existing designs for
providing IP-anycast must either globally distribute routes to individual anycast groups, or
confine each anycast group to a pre-configured topological region. The first approach does
not scale because of excessive growth in the routing tables, whereas the second one
severely limits the utility of the service. Our design scales by dividing inter-domain anycast
routing into two components. The first component builds inexpensive default anycast routes …

This paper proposes GIA, a scalable architecture for global IP-anycast. Existing designs for
providing IP-anycast must either globally distribute routes to individual anycast groups, or
confine each anycast group to a pre-configured topological region. The first approach does
not scale because of excessive growth in the routing tables, whereas the second one
severely limits the utility of the service. Our design scales by dividing inter-domain anycast
routing into two components. The first component builds inexpensive default anycast routes …