Autonomous System

Intra-AS Routing in the Internet: OSPF
Intra-AS Routing in the Internet: OSPF

Like RIP, OSPF routing is extensively used for intra-AS routing in the Internet. OSPF and its closely related cousin, IS-IS, are normally deployed in upper-tier lSPs whereas RIP is deployed in lower-tier ISPs and enterprise networks. The Open in OSPF indicates that the routing

Tags autonomous system, ospf packet, area border routers, link weights
Inter-AS Routing: BGP
Inter-AS Routing: BGP

We just studied how ISPs use RIP and OSPF to find out optimal paths for source-destination pairs that are internal to the same AS. Let's now consider how paths are determined for source-destination pairs that span multiple ASs. The Border Gateway Protocol version 4, is the de

Tags bgp peers, subnet, routers, bgp session, autonomous system, peering link, stub network
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