It could mean that DTAG is actively turning down money by not filling up links that are sold on a 'per mbit' basis. Also, it could lead to confusion, which I'll try to explain with the following example:
You are AS65001, you buy transit from AS65555. You have a sister company (AS65002) with which you swap your full routing table. That sister company buys transit from DTAG (AS3320). DTAG and AS65555 peer with each other. AS65002 will announce the routes originated by AS65001 to DTAG.
DTAG now has to choose between two paths: a 'peering' path 65555_65001$ and a 'customer' path 65002_65001$. Both paths by default will have a local preference value of 100. So if for some reason the 'peering' path is chosen (because it's older, or the router-id of that Continue reading