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Bonding links between 2 Cisco routers


I want to aggregate 2 ISP link to have one big link and thus simulate a very high bandwith connection.

Here is the topology:


ISP routers are not connected directly to the Cisco router because there are only 2 ethernet interfaces.

I want to redirect all traffic from the Branch to the Datacenter using a bonding (multihoming) connection. I don't want to have a load balancing or failover connection, I really want to bond the 2 ISP connection to have one link at 16 Mbits/s. Is that possible with these hardware equipment ? If it's possible, wich technology do I use (BGB, VPN bonding, other) ?


Thanks for help.

Everyone's tags (2)
Community Member

In order to bond links, it is

In order to bond links, it is necessary to agree with the other side. The links are towards the same ISP? If yes, then you have to ask for it by the ISP. But why do you want to bond links? What do you believe you will gain?

VIP Super Bronze

Hi,It is not possible with


It is not possible with this setup.  The ISP routers are separate, you could however aggregate if both connections were going to only one ISP router.


Community Member

I want to bond links because

I want to bond links because where the branch is there is only  ADSL accesses and i want to be able to download at 16 Mbits/s and not being stuck at 8 Mbits/s.


Indeed this is 2 differents ISP. I specify that the public IP provided by the ISP are configured on Cisco routers on both side (Branch and Datacenter).


I learn that it can be possible with BGB routing and HSRP/GLBP but this solution is too complex to implement for me. So, is there a different way or is that possible to do it with several VPN as can be done with a Linux server and set VPN bonding ?

Super Bronze

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There is one way to use both those paths like one combined link, and that would be ECMP routing while doing packet-by-packet forwarding; which I very much recommend you do NOT pursue.


Perhaps the best option, to leverage the bandwidth of both paths, would be something like OER/PfR which can dynamically load balance flows across multiple paths.  (NB: it may take some logical topology restructuring to allow OER/PfR to "see" two paths.  What you have now, crossing the Internet, might "hide" the two paths.)

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