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recovery network

Hello,

For one of our Subsidaries new office, we are planning to setup a Disaster recovery (DR) network.  They will have a normal production live network in their office. The proposed DR centre will come up in another location & will be connected via MPLS links.

Few queries regarding this;

1. Should the ip addressing on both production & Dr site be the same?

    what are the advantages & disadvantages of this

2. When the DR needs to be live due to loss of production centre, how is it done from Network point of view.

The network devices used ( Router, firewall, switches etc ) will be exact replica of the production site.

Appreciate all inputs

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recovery network

Hello, it is it not normal practice to have duplicate addressing at a DR site, you would usually have a separate IP address schema for each site. Consider that even when your DR site is not in use you will probably want to monitor/manage the devices that are there and if they are using the same addresses as your "real" site then this becomes very difficult unless you implement VRFs or segregate the traffic some other way.

When you are in DR state then you should not necessarily need to do anything from a network point of view - the DR site is a live site on your MPLS network that has suddenly got very busy! Things you may need to think about are things like host name resolution - if everyone is using a server at your live site which resolves to ip address x.x.x.x it now needs to resolve to ip address y.y.y.y which is the address of your server at the DR site. Internet breakout is also relevant - if your internet link is at your current head office then what happens when that site is down? If your internet breakout is in the "cloud" (i.e. hosted at a DC or an ISP) then nothing needs to change.

1 REPLY
Silver

recovery network

Hello, it is it not normal practice to have duplicate addressing at a DR site, you would usually have a separate IP address schema for each site. Consider that even when your DR site is not in use you will probably want to monitor/manage the devices that are there and if they are using the same addresses as your "real" site then this becomes very difficult unless you implement VRFs or segregate the traffic some other way.

When you are in DR state then you should not necessarily need to do anything from a network point of view - the DR site is a live site on your MPLS network that has suddenly got very busy! Things you may need to think about are things like host name resolution - if everyone is using a server at your live site which resolves to ip address x.x.x.x it now needs to resolve to ip address y.y.y.y which is the address of your server at the DR site. Internet breakout is also relevant - if your internet link is at your current head office then what happens when that site is down? If your internet breakout is in the "cloud" (i.e. hosted at a DC or an ISP) then nothing needs to change.

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