North American Network Operators Group
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Re: Disaster recovery using as-prepend?
- From: Andy Davidson
- Date: Thu Feb 16 10:05:55 2006
On 16 Feb 2006, at 14:56, Christopher J. Pilkington wrote:
We have a PI /24 we'd like to advertise out of our primary data center
for production use. (Well, actually, we'll be advertising a more
specific from our /21 assignment, so already not too friendly... but I
digress.)
[...]
I'm thinking advertising the same prefix and just doing several
as-prepends. However, now I'm not sure if this is a polite thing to
do or not.
How about advertising all of your PI from all of your perimeter
routers, and configuring internal routing to ensure packets get to
the rightful live/preferred data centre. Then, in the event of a
failover situation, you can change the routing behaviour so that
packets for the production /24 end up in the alternative dc.
To work, this does imply you have good connectivity between your live
and failover environments (but i guess you have this so that you can
copy over state/live data between your two environments anyway..), so
that you can carry customer/live data over the link too.
Double plus good for you if you can get cheap transit delivered to
your failover dc - you could use this for your preferred environment
too !
cheers
-a
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