How does multiple IP addresses work with a Broadband Bonding multi-WAN firewall?

Keeping the ease of control and management of a single IP address on the WAN side can be an important factor for the IT team when implementing a WAN virtualization, WAN optimization or WAN bonding solutions. Especially in non-green-field deployments of a WAN expansion via a Broadband Bonding or load-balancing router, the key element is to be able to have minimal impact on the existing network configuration. This may become a challenge with a legacy load-balancers with multiple public facing IP addresses with various ISPs, as this is a new setup compared to the single WAN IP address.

With a broadband bonding router, the IP addressing is managed internally and transparently so that any complicated implications are mitigated from the local network, in other words, no changes are needed in the office local network including the existing firewall. In a peered mode operation where the branch office bonds multiple WAN links through the Head Quarter / Data Center broadband bonding server, the HQ/DC unit maps a single static IP address to the branch office network, so in effect the data center IP address is extension of the branch office LAN. In this setup the branch office will have a single publicly routable IP address at the Data Center that utilizes the bonded IP pipe. The advantage of this approach is that if/when any of the WAN links within the bonded tunnel fails (and believe me it will), the connectivity in and out of the branch office will not be disrupted. The IP address will be up and will provide access in and out of the branch office as intended. This approach has a significantly higher ISP fault-tolerance compared to a multiple IP multi-WAN load-balancing approach, where loosing an ISP connection will result in loosing the IP address provided by that ISP as well as loosing the active sessions on that ISP. Unlike load-balancers, with the true-bonding routers, the session will be kept alive even if some of the links in the bonded tunnel fails. This includes having the MPLS connection within your WAN framework. With broadband bonding you can even bond MPLS with DSL or cable connections and therefore keep your MPLS alive even if your MPLS carrier has any outages and that’s how you achieve the most high 9s reliability for your Internet connection.

Cahit Akin, CEO, Mushroom Networks, Inc.

Mushroom Networks is the provider of SD-WAN (Software Defined WAN) and NFV solutions capable of Broadband Bonding that enables self-healing WAN networks that route around network problems such as latency, jitter and packet loss.

https://www.mushroomnetworks.com

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Anna
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Anna

This is a good article, thanks,

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