[AusNOG] Cisco help (Configure a dual failover wan on cisco 1811)

[Grant Phillips]

Hi Karl,

Attached is a doco found on Google one day. This will be helpful in failing
over traffic. I would recommend using "track X interface dialer X ip
routing" instead of pinging to an IP across the link. Both are effective
though.

Cheers,
Grant

On Wed, May 26, 2010 at 1:22 PM, Karl Kloppenborg <karl at karltec.net> wrote:

> Hi Noggers,
>
> Okay so here is the scenario,
> I have one Cisco 1811 integrated services router with a number of Fast
> Ethernet interfaces on it,
>
> What I want to do is make a dual Wan failover setup with the following
> configuration
> (Note: I am not asking someone to just give me a config because I won't
> learn that what, but pointers and tips are most welcome :D)
>
> Wan1 (Primary internet connection)
> Interface: FastEthernet0
> IP Address: Static
>
> Wan2 (Backup Internet connection)
> Interface: FastEthernet1
> IP Address: Assigned by PPPoE Client (Modem is in bridged mode so need to
> authenticate with some type of dialer interface + PPPoE)
>
> NAT0 (VLAN1)
> Interface: FastEthernet2
> IP Address: 10.0.2.1 / 24
> Services: QOS / Port Forwarding / DHCP / Firewall / DPI
>
> Notes:
> Okay so basically I need the LAN traffic to route through the primary int,
> but in the event that it is lost (Modem dies or even better if it looses
> ping with the next hop) then switch over to WAN2
> Alternatively let me manually switch between the gateways
>
> ip route 0.0.0.0 0.0.0.0 FastEthernet0
> no ip route 0.0.0.0 0.0.0.0 FastEthernet1 //Turn this one on when the
> Primary interwebs drops and turn the FastEthernet IP route off ?
>
> Any help much appreciated!
>
> *
> Cheers!
> Karl Kloppenborg*
> P 02 8014 4253*  EXT:104*  | M *0438475892  |  www.karltec.net*
> *
>
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