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The most common method of configuring ISDN is with dialer maps, but dial info can also be configured on a logical interface. To pass the CCNA exam, you should know how to configure and troubleshoot both dialer maps and dialer profiles.

Dialer Profiles permit diverse dialing details to be configured onto logical interfaces. The logical interfaces may have distinct dialing destinations, distinct remote router names, and so on., but theyll be making use of the identical physical interface.

Dialer strings are employed on dialer profiles. Note that each and every logical interface has a different IP address, a different remote router to dial, and a various dialer string, but they will be employing the very same physical interface to dial out. The commands dialer pool and dialer pool-member are used to link the logical and physical interfaces. The number following every command need to match for the logical interface to appropriately bind to the physical interface.

R1(config)#interface dialer0

R1(config-if)#ip address 172.16.1.1 255.255.255.

R1(config-if)#encapsulation ppp

<. The encapsulation type is placed on both the logical and physical interfaces.>

R1(config-if)#dialer remote-name Remote0

R1(config-if)#dialer pool 1

< places logical interface into dialer pool>

R1(config-if)#dialer string 5551212

< number dialed to contact router Remote0>

R1(config-if)#dialer-group 1

< links logical interface to dialer-list 1>

R1(config)#interface dialer1

R1(config-if)#ip address 172.16.1.two 255.255.255.

R1(config-if)#encapsulation ppp

R1(config-if)#dialer remote-name Remote1

R1(config-if)#dialer pool 1

R1(config-if)#dialer string 5551234

R1(config-if)#dialer-group 1

R1(config)#interface bri0

R1(config-if)#no ip address

< With dialer profiles, IP addresses are assigned to logical interfaces.>

R1(config-if)#encapsulation ppp

< The encapsulation type is place on both the logical and physical interfaces.>

R1(config-if)#dialer pool-member 1

< The number associated with this command should match the number configured with the dialer pool number on the logical dialer interfaces.>

R1(config-if)#isdn spid1 0835866101

R1(config-if)#isdn spid2 0835866301

When configuring dialer profiles, the encapsulation variety should be placed on each the physical BRI interface and the logical dialer interfaces. The SPIDs are configured on the physical interface as nicely.

Configuring dialer profiles can be a little tricky at 1st, and the best way to master this ability is to get genuine hands-on practice in your personal CCNA / CCNP residence lab or a rack rental service. Either way, hands-on is the best practice. Best of luck in your CCNA research! study collections