Announcing Peering-LAN prefixes to customers

[Dominic Schallert <ds () schallert com>]

Hi all,

this might be a stupid question but today I was discussing with a colleague if Peering-LAN prefixes should be 
re-distributed/announced to direct customers/peers. My standpoint is that in any case, Peering-LAN prefixes should be 
filtered and not announced to peers/customers because a Peering-LAN represents some sort of DMZ and there is simply no 
need for them to be reachable by third-parties not being physically connected to an IXP themselves. Also from a 
security point of view, a lot of new issues might occur in this situation.

I’ve been seeing a few transit providers lately announcing (even reachable) Peering-LAN prefixes (for example DE-CIX 
Peering LAN) to their customers. I’m wondering if there is any document or RFC particularly describing this matter?

Thanks
Dominic

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