ZyXEL Communications USG210 - What You Need to Know; The RIP Screen

Chapter 11 Routing
ZyWALL USG Series User’s Guide
418
Routing protocols are usually only used in networks using multiple routers like campuses or large
enterprises.
• Use the RIP screen (see Section 11.6 on page 418) to configure the Zyxel Device to use RIP to receive
and/or send routing information.
• Use the OSPF screen (see Section 11.7 on page 420) to configure general OSPF settings and manage
OSPF areas.
• Use the OSPF Area Add/Edit screen (see Section 11.7.2 on page 424) to create or edit an OSPF area.
• Use the BGP screen (see Section 11.8 on page 427) to configure eBGP (exterior Border Gate Protocol).
11.5.1 What You Need to Know
The Zyxel Device supports two standards, RIP and OSPF, for routing protocols. RIP and OSPF are
compared here and discussed further in the rest of the chapter.
11.6 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 Zyxel Device, 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.
• Second, the Zyxel Device can also redistribute routing information from non-RIP networks, specifically
OSPF networks and static routes, to the RIP network. Costs might be calculated differently, however,
so you use the Metric field to specify the cost in RIP terms.
• RIP uses UDP port 520.
Use the RIP screen to specify the authentication method and maintain the policies for redistribution.
Click Configuration > Network > Routing > RIP to open the following screen.
Table 142 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