ZyXEL Communications ZyWALL 110 Series, User Manual, Page: 199 / 562

ZyWALL 110/310/1100 Series User’s Guide
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Routing Protocols
10.1 Routing Protocols Overview
Routing protocols give the ZyWALL routing information about the network from other routers. The
ZyWALL stores this routing information in the routing table it uses to make routing decisions. In
turn, the ZyWALL 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.
10.1.1 What You Can Do in this Chapter
• Use the RIP screen (see Section 10.2 on page 199 ) to configure the ZyWALL to use RIP to
receive and/or send routing information.
• Use the OSPF screen (see Section 10.3 on page 201 ) to configure general OSPF settings and
manage OSPF areas.
• Use the OSPF Area Add/Edit screen (see Section 10.3.2 on page 206 ) to create or edit an OSPF
area.
10.1.2 What You Need to Know
The ZyWALL supports two standards, RIP and OSPF, for routing protocols. RIP and OSPF are
compared here and discussed further in the rest of the chapter.
Finding Out More
See Section 10.4 on page 208 for background information on routing protocols.
10.2 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
Table 72
RIP vs. OSPF
RIP OSPF
Network Size Small (with up to 15 routers) Large
Metric Hop count Bandwidth, hop count, throughput, round trip time and
reliability.
Convergence Slow Fast