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New Member

Tunnel interface/ADSL dynamic IP´s

I have two sites connected to the Internet using ADSL and dynamic IP´s.

Is there any way to configure a tunnel between the routers without using static IP´s?

Perhaps mapping an ip host to a domain name (using a dynamic DNS and ddns updates on the router),

and using that host as the tunnel destination. The tunnel would be used by ODR,

so it would not have to be up all the time nor for long periods of time.

If the IP address of one othe routers would change and drop the

tunnel, the other router could perform dns lookup to resolve the new IP.

Is this scenario possible? How would the config be?

I know that you can configure the tunnel destination using a domain name, but

it is replaced by the resolved ip address in the running config, so the router

would not perform a dns lookup the next time the tunnel is used (...and the ip address

would be outdated).

As always, any info will be much appreciated.

Regards,

Eduardo

2 REPLIES
Bronze

Re: Tunnel interface/ADSL dynamic IP´s

New Member

Re: Tunnel interface/ADSL dynamic IP´s

Hola Eduardo

I´ve similar issue as you.

I need to build a ISDN backup tunnel of a main ADSL VPN tunnel with fixed IP using the different and dynamic IP´s provided by Telefonica when ISDN comes up due to a ADSL failure. Whe could keep in touch at miquel_s arroba menta dot net

Saludos

Miquel

Barcelona

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