connect Cisco 891 to isp

Unanswered Question
Apr 30th, 2014
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Hello

Im having some problems lately with our new site network configuration.

We have there new Cisco 891 router and from isp we have Zyxel P-660HN-T1A router/modem as isp connection termination and one public ip from isp.

Problem is, how to setup router for this to work with zyxell? we want to use GRE tunnels to create site to site vpn, but im completly lost.

Should zyxell be in routing/bridge mode?

Any thoughts please?

Thx

 

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Karsten Iwen Wed, 04/30/2014 - 04:05
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If you use the Zyxel as a router, the public IP is on that device and is NATed to a private transfer-network that you have between the Zyxel and your 891.

For best flexibility, you should use a "DSL-Modem" in front of the router. With that the public IP is on your cisco 891 and you can use the whole features that your 891 offers.

Based on the Web-Description of the P660HN-T1A, the "Modem-Mode" is not supported on that device. I would try to get a different device that offers that flexibility.

Juraj_Ferenc Wed, 04/30/2014 - 04:29
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Hello Karsten

Thank you very much for your reply.

Yes i was thinking about this too, but ISP doesnt offer any modem like this, without routing features.

Can you propose me some device like that?

Thank you

Karsten Iwen Wed, 04/30/2014 - 06:02
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Great finding! I also just saw the Bridge-Mode mentioned in the user-guide on section "5.2.1 Manual Configuration".

It seems that it really should work with that device. 

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