Hi all,
I work in the service provider industry and recently took on the responsibilities of the transit and peering.
I am working through extending the use of communities to control traffic within our business over some current as path filtering and prefix lists.
my thoughts are that I will setup customer route maps, and set communities on the ingress from the customer that tag the routes as a CUSTOMER learnt route.
I expect to have potentially around 100 prefixes that customers send us.
I will setup similar communities for learnt routes via IX, and TRANSIT by also setting each with specific communities for this. These communities will then be used to decide which routes need to be sent, eg IX or TRANSIT or both.
Regarding the use of communities in the above and filtering on egress, is there any reason to go ahead and maintain a prefix list on the borders that we use to send out to our transit providers as well? I know its a double check, but problem is that this is more overhead, and I am trying to find the right balance of workload and keeping the configuration in tip top shape such we don't have to carry out time consuming auditing.
Would love some feedback here, of people who work in SP environments and how they maintain their border devices.
