CISCO 876W IOS question

Unanswered Question
Mar 3rd, 2007

Hi all,

I got a question concerning the IOS installed on my Cisco 876W.

I got a Cisco 876W with ADSL, WLAN and ISDN S/T Inteface and a LAN 4 Port Switch.

I want to use the ISDN as a Backup connection if the ADSL fails.

I?ve read the config guide and there is written that the router uses the isdn normally for remote administration and not as a backup device.

So my question is: Is the IOS image file with advanced security able to use the ISDN as a Backup device or need I the enterprise version of the IOS ?

And has the enterprise version also the ability to build vpns over ADSL and ISDN ?

Thanks for your hel




I have this problem too.
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Danilo Dy Sat, 03/03/2007 - 23:55

Nope, you don't need special feature IOS. What you are trying to do is floating static route.

However, you may need to use IP GRE through ADSL to make the floating static route work.

For Example.

Remote Router network =

Local Router IP GRE Interface = Tunnel0

Local Router ISDN Dialer Interface = Dialer0

! local router

ip route Tunnel0

ip route Dialer0 200


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