Installing and Administering Internet Services

Chapter 8 265

Conﬁguring gated

Conﬁguring the OSPF Protocol

authkey is the password used to validate protocol packets received on

the router interface. The value is one of the following: 1 to 8 decimal

digits separated by periods, a 1-byte to 8-byte hexadecimal string

preceded by 0x, or a string of 1 to 8 characters in double quotes.

Default: None

Range: Up to 8 bytes

NOTE To set an authkey value, the authtype clause must be set to 1 or

simple for the area. See “Authentication” on page 272 for more

information about using OSPF authentication.

Figure 8-6 shows an example of a router that is connected to a multicast

network through interface 193.2.1.35.

Figure 8-6 Multicast Router Interface Example

The following is an example of the multicast interface deﬁnition in the

router’s /etc/gated.conf ﬁle:

interface 193.2.1.35 cost 5 {

enable ;

priority 15 ;

hellointerval 5 ;

routerdeadinterval 20 ;

retransmitinterval 10 ;

} ;

Non-Broadcast Multi-Access (NBMA) Interface. On NBMA

networks, certain conﬁguration information, including the routers that

are attached to the network, must be supplied in order for OSPF’s Hello

protocol to communicate with neighbor routers. An NBMA interface

Router

193.2.1.35

Router