A system can distribute the load from a failed system across the remaining hardware without any glitches or overload thanks to its redundancy. When your leased cabinet or cage is connected to your UK colocation network, setting up a redundant network solution is possible. These can be easily achieved but usually the options in achieving this task are expensive. You can get tons of advantages from a cheaper alternative-setting up a redundant network with a colocation provider.
You can improve the speeds by which you access your website or your websites are accessed by outsourcing network traffic to a colo provider that has a larger bandwidth capacity. This can benefit you in many ways: not only can you free up your internal networks for other purposes, you can also significantly reduce your traffic backhaul costs. Many companies now offer simple solutions to setting up a redundant network with a colocation provider.
In creating a simple redundant network you just have to configure two VLANS, one to your router and the other as a gateway for local servers. You can have redundancy in your internet links by creating a default route; this will ensure that when one link fails traffic will be transferred without delay to the other.
There are internal and external networks involved in network redundancy. Your redundant external network is created when you take two drops form different routers in your server co-location provider. Typically each drop has its own or 30 configured on it so you can set up communication between your firewalls and the colocation routers or firewalls. Each drop has a BGP over it, and you can ask your colocation to route a public IP space over it. With BGP, your primary link can be dropped and then picked up by the secondary drop automatically. By plugging each drop into a different switch on your network and splitting two Ethernet cables from each switch, you can plug the drops into your firewalls. For example, a drop from one colocation plug is then split into each firewall. Likewise, drop two goes through the same process on a different route. If you do not have the budget for four switches then you can create a VLAN on each switch with three ports in it to accomplish each goal.
The internal network redundancy is provided by plugging DMZ1 on FW01 into SW01 and DMZ1 on FW02 into SW02. You should likewise connect SW01 and SW02 to let the servers communicate effectively. LB01 and LB02 should be plugged into SW01 and SW02, respectively.
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