ZyXEL UAG715 User Guide - Page 165
Routing Protocols
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CHAPTER 11 Routing Protocols 11.1 Routing Protocols Overview Routing protocols give the UAG routing information about the network from other routers. The UAG stores this routing information in the routing table it uses to make routing decisions. In turn, the UAG can also use routing protocols to propagate routing information to other routers. Routing protocols are usually only used in networks using multiple routers like campuses or large enterprises. 11.1.1 What You Can Do in this Chapter • Use the RIP screen (see Section 11.2 on page 165) to configure the UAG to use RIP to receive and/or send routing information. • Use the OSPF screen (see Section 11.3 on page 167) to configure general OSPF settings and manage OSPF areas. • Use the OSPF Area Add/Edit screen (see Section 11.3.2 on page 172) to create or edit an OSPF area. 11.1.2 What You Need to Know The UAG supports two standards, RIP and OSPF, for routing protocols. RIP and OSPF are compared here and discussed further in the rest of the chapter. Table 65 RIP vs. OSPF RIP Network Size Small (with up to 15 routers) Metric Hop count Convergence Slow OSPF Large Bandwidth, hop count, throughput, round trip time and reliability. Fast Finding Out More See Section 11.4 on page 174 for background information on routing protocols. 11.2 The RIP Screen RIP (Routing Information Protocol, RFC 1058 and RFC 1389) allows a device to exchange routing information with other routers. RIP is a vector-space routing protocol, and, like most such protocols, it uses hop count to decide which route is the shortest. Unfortunately, it also broadcasts UAG715 User's Guide 165