Cisco 1921 - Two Dialer Interfaces

[Martin Cummins]

Hi,

I have a 1921 router with two VDSL EHWIC ports fitted.

My question is, in order to establish two internet connections do I need to create two dial-pool-number instances - one for each interface or can i use one? 

I currently have Dialer1 shutdown as the office is currently connected to the internet via Dialer0 with no issues.

interface Ethernet0/0/0
no ip address
!
interface Ethernet0/0/0.2
encapsulation dot1Q 2
pppoe enable group global
pppoe-client dial-pool-number 1

!
interface Ethernet0/1/0
no ip address

interface Dialer0
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp pap sent-username xxxxxx password xxxxxxx
ppp ipcp mask request
ppp ipcp address accept
crypto map outside

interface Dialer1
ip address negotiated
ip virtual-reassembly in
encapsulation ppp
shutdown
ppp authentication chap callin
ppp pap sent-username xxxxxx password xxxxxx
ppp ipcp mask request
ppp ipcp address accept

dialer-list 1 protocol ip permit

[Georg Pauwen]

Hello,

you need two dialer interfaces and bind each subinterface to a different dialer. In your partial configuration it looks like you have a VPN connection. Is the other connection supposed to be VPN as well ?

[Martin Cummins]

Ah ok so you mean like:

interface Ethernet0/0/0.3
encapsulation dot1Q 2
pppoe enable group global
pppoe-client dial-pool-number 2

and dialer pool 2 on the second Dialer?

Regarding the VPN, no that is to remain on the first Dialer interface.

My plan - once the 2nd Dialer interface is up - is to have a static route to a remote server via the 2nd dialer internet connection, and only traffic to that server uses that service.

[Georg Pauwen]

Hello Martin,

yes, that should work. Default route out to Dialer0, and a more specific route to your server out the other dialer.

[Martin Cummins]

Thank you Georg, I will try that and feedback

[Georg Pauwen]

Hello,

post your configuration if you run into any problems...

[Martin Cummins]

Hi when i try to add:

ROUTER01(config)#interface Ethernet0/0/0.3
ROUTER01(config-subif)# encapsulation dot1Q 2

I receive the following error:

%Configuration of multiple subinterfaces of the same main
interface with the same VID (2) is not permitted.
This VID is already configured on Ethernet0/0/0.2

The vlan tag of '2' is set by the ISP