TRAFFIC TUNNELING

[divine007]

we are ISP our office are in 7 different towns,but 2 principal towns and Internet connections

from thesame provider and we communicate with the provider using BGP protocol and we use GRE tunneling to communicate between towns

i want that whenever one of my principal towns does not have internet service

they can pass through the tunnel and go the internet through the other principal

town connection.

Needs help to realise this

Thanks

[Peter Paluch]

Hello,

Your question is too general and it is difficult to give you any direct guidance. We would need to understand better the kind of routing you are performing within your network, over the GRE tunnels and towards your own ISP. Seeing your topology including the GRE tunnels and your relations with the outside world is an absolute must. Do you believe you could provide this information in a larger detail?

Thank you!

Best regards,

Peter

[divine007]

Sorry for the delay, as shown in the attached pic, the protocol in use is BGP

Protocol.The routers are cisco 7200 series routers

i want that wentever there is connectivity issues with Town B from CA Telecom,Town B

can pass through Town A and go through to the internet and vice versa.Town A and B communicate using GRE Tunelling

[divine007]

Has someone got anything for me ?

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

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Posting

If you lose your Internet service at one site, yes you could use the tunnel assuming if it does NOT rely on Internet connectivity (i.e. it's running across an internal network).

PS:

If you do have an internal path, you shouldn't really need a GRE tunnel.

[divine007]

hello,

         pls can i have some tips on how to go about with this to be put into action

[divine007]

Wishing to know if i will need to run an internal routing protocol before this takecare or it can take place using the tunnelling interface.And what contributes for this to take place

Will appreciate your suggestions

[Joseph W. Doherty]

Disclaimer

The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

Liability Disclaimer

In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.

Posting

How this can be accomplished varies.  In general, if each Internet egress point advertises itself as a default route with local cost, all internal hosts should select the "closest" exit.  If there's failure of one of the Internet egress points, withdraw its advertisement.  Then, hosts should select the next "closest" exit.

[divine007]

@JosephDoherty,

                             that means everytime there is failure at one point i need to withdraw it's advertisement? i need it to be authomatic

Thanks

[Joseph W. Doherty]

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

Not if it's tied dynamically tied to having a particular egress path.