Routing Protocols Overview; What You Need To Know; The Rip Screen - ZyXEL Communications ZyWALL 110 User Manual

10.5 Routing Protocols Overview

Routing protocols give the ZyWALL/USG routing information about the network from other routers.
The ZyWALL/USG stores this routing information in the routing table it uses to make routing
decisions. In turn, the ZyWALL/USG 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.
• Use the RIP screen (see
receive and/or send routing information.
• Use the OSPF screen (see
manage OSPF areas.
• Use the OSPF Area Add/Edit screen (see
area.

10.5.1 What You Need to Know

The ZyWALL/USG 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 119 RIP vs. OSPF
Network Size
Metric
Convergence
Finding Out More
See Section 10.8 on page 288

10.6 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
its routes asynchronously to the network and converges slowly. Therefore, RIP is more suitable for
small networks (up to 15 routers).
• In the ZyWALL/USG, you can configure two sets of RIP settings before you can use it in an
interface.
• First, the Authentication field specifies how to verify that the routing information that is
received is the same routing information that is sent. This is discussed in more detail in
Authentication Types on page
Chapter 10 Routing
Section 10.6 on page
Section 10.7 on page
RIP
Small (with up to 15 routers) Large
Hop count
Slow
for background information on routing protocols.
288.
ZyWALL/USG Series User's Guide
279) to configure the ZyWALL/USG to use RIP to
281) to configure general OSPF settings and
Section 10.7.2 on page
OSPF
Bandwidth, hop count, throughput, round trip time and
reliability.
Fast
279
285) to create or edit an OSPF