In secondary office we have 2 low speed connection to ISP (ADSL modem with Ethernet). Each interfaces have own ip address. I want simultaneously use this interfaces to increase total bandwith of internet connection.
I think i can do:
interface Loopback1
ip address 2.2.2.2 255.255.255.252 secondary
ip address 1.1.1.1 255.255.255.252
ip nat outside
!
interface FastEthernet0/0
no ip address
speed auto
!
interface FastEthernet0/0.1
description To ISP 1
encapsulation dot1Q 1 native
ip unnumbered Loopback1
!
interface FastEthernet0/0.2
description To ISP 2
encapsulation dot1Q 2
ip unnumbered Loopback1
!
interface FastEthernet0/0.3
description To LAN
encapsulation dot1Q 3
ip nat inside
!
ip route 0.0.0.0 0.0.0.0 Loopback1
!
ip nat pool NPL prefix-length 32
address 1.1.1.1 1.1.1.1
address 2.2.2.1 2.2.2.2
I think that must work. Is it right?
And we have second problem.
In main office we have high speed connection to ISP (other ISP in other city).
And we have to create tunnel to second office. I don't understand how configure routers to provide tunnel that can use two interfaces in second office (similar multilink ppp)
Thanks.