WAN Failover Cisco 2821

Why not order a HWIC-DSL card and put the dsl card right in to the 2821 instead of using an external modem? Perhaps you already are but when you said you're using a 4ESW-HWIC with a DSL line I just assumed external modem....  As for failover you could do a policy based failover such as:

http://www.cisco.com/en/US/tech/tk364/technologies_configuration_example09186a0080211f5c.shtml

yeah that seems a little above my paygrade, is there a simple way to possibly just do a failover with a metric or something?

Might be easier with a state full NAT fail over as described here:

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t13/feature/guide/ftsnat.html 

However, do you have two WAN ports or are you wanting to use two switch ports?  If you don't have two WAN ports this isn't going to work anyway.

WAN ports?  isn't that determined by configuration, our current interfaces

PCCHMRT02#sh ip int brief
Interface                  IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0         96.x.x.242   YES NVRAM  up                    up
GigabitEthernet0/1         192.168.253.25  YES NVRAM  up                    up
FastEthernet0/0/0          unassigned      YES unset  up                    down
FastEthernet0/0/1          unassigned      YES unset  up                    down
FastEthernet0/0/2          unassigned      YES unset  up                    down
FastEthernet0/0/3          unassigned      YES unset  up                    up
Vlan1                      unassigned      YES NVRAM  up                    down
Vlan2                      172.31.30.1     YES NVRAM  up                    up
Vlan5                      unassigned      YES NVRAM  administratively down down
Vlan11                     10.201.201.1    YES NVRAM  up                    down
NVI0                       unassigned      NO  unset  up                    up

You should be ok then. I was just saying that I don't think you can use a switch port as a failover route but I could be wrong....

FastEthernet0/0/0          unassigned      YES unset  up                    down
FastEthernet0/0/1          unassigned      YES unset  up                    down
FastEthernet0/0/2          unassigned      YES unset  up                    down
FastEthernet0/0/3          unassigned      YES unset  up                    up

these are the ports in the 4esw-hwic, so you are saying I can't use those as a failover?

I haven't worked with the 4ESW enough to give you a perfect answer here other than to try it.... However, I don't think that card will allow you to specify HSRP (Hot standby routing protocol) on one of the FastEthernet Interfaces and if it won't then you can't do the NAT fail over with that port.  The issue is that Switches are layer two devices and have some layer three characteristics at times.  You need a full on layer 3 port that can route IP's through.  I'd suggest just trying it and see if it will even allow you to issue the commands.

I agree with @atechnicnate that the 4ESW will not allow HSRP to work as the switch port will make HSRP think it's up all the time.

Since I have nothing to test with I found an old thread that I think fits what you are trying to do.

https://supportforums.cisco.com/thread/1002905

Can someone tell me definite that it won't work, what if I have an additional 877 to work with, can it work somehow that way?

It won't work with an 877 for sure. You need two non switch ports (layer 3 ports) to make it work properly.

i meant using the 877 in conjunction with the 2821 to get it to work, doesn't the 4esw-Hwic support layer 3?

Thats the best answer I've seen so far.  The links seem helpful, just have to put in place, Just curious, wouldn't you be available via email for some prepaid engineering help.  Just to maybe have you answer questions and maybe look over the config?  How can I contact you if so?

Thanks

Sure. Email me at mbernhardt8-at-comcast-dot-net. I don't think there's a problem with the EE terms of service for this, but I don't want spammers to find me.

thanks, I sent you an email