two dialers to one bri

[amenash123]

hi

i would like to know if can i connect two branch with dialer string to a single bri , and if i can who can i do that .

thanks you

[Georg Pauwen]

Hello,

yes you can, by default each dialer only uses one of the two B channels. You can even configure PPP multilink, but that could cause problems if both branch offices would try to connect at the same time.

The configuration of your head office router would look like this (IP addresses and usernames/remote names are arbitrary):

HeadOffice#

!

isdn switch-type basic-net3

!

username Branch1 password branch1password

username Branch2 password branch2password

!

interface BRI0/0

no ip address

encapsulation ppp

dialer pool-member 1

!

interface Dialer1

description connected to Branch 1

encapsulation ppp

ip address 192.168.1.1 255.255.255.0

dialer pool 1

dialer-group 1

dialer remote-name Branch1

dialer string 12345

ppp authentication chap

!

interface Dialer2

description connected to Branch 2

encapsulation ppp

ip address 192.168.2.1 255.255.255.0

dialer pool 1

dialer-group 1

dialer remote-name Branch2

dialer string 67891

ppp authentication chap

!

dialer-list 1 protocol ip permit

ip route 192.168.1.0 255.255.255.0 Dialer1

ip route 192.168.2.0 255.255.255.0 Dialer2

Can you try and see if this works for you ?

Regards,

GP

[amenash123]

is it example said that the both branch will success to connect at the same time?

[lortel]

Even though GP's answer is technically correct, it is slightly involved - you do not have to use virtual dialer interfaces for a single BRI to connect to two sites. You can use the dialer map command instead with fewer configuration lines:-

HeadOffice#

!

isdn switch-type basic-net3

!

username Branch1 password branch1password

username Branch2 password branch2password

!

ip route 192.168.1.0 255.255.255.0 192.168.3.1

ip route 192.168.2.0 255.255.255.0 192.168.3.2

!

interface BRI0

ip address 192.168.3.3 255.255.255.0

encapsulation ppp

ppp authentication chap

dialer map ip 192.168.3.1 67891

dialer map ip 192.168.3.2 12345

dialer-group 1

!

dialer-list 1 protocol ip permit

Hope this solves your problem,

Sree

[amenash123]

does that branch1 and branch2 need to be the name of the remote router?

username Branch1 password branch1password

username Branch2 password branch2password

thank you

[antonyjaison]

Yes it should be the hostname of remote router and password should be same on both head office and remote routers.

Jaison

[lortel]

In continuation to my previous posting the dialer map command lines require the remote hostnames for chap authentication. Those lines maybe modified:

dialer map ip 192.168.3.1 name Branch1 67891

dialer map ip 192.168.3.2 name Branch2 12345

Sree