Notes we wrote for customers, not for search engines. Short, practical, and occasionally inconvenient if you have already made the mistake.
Buying for your worst second is expensive; buying for your monthly 95th is how circuits get built. Measure both, then size to the percentile with headroom for growth — and ask about bursting rather than paying for a permanently idle pipe.
Most peering requests fail on paperwork, not physics. Publish IRR objects or ROAs for every prefix, make sure your announcements match at every exchange, and keep the NOC contact current. That is the whole checklist.
IRR objects are registrations that filtering engines trust by convention. ROAs are signed statements about which ASN may originate a prefix. Use both — IRR alone leaves accidental hijacks open, RPKI alone leaves stale objects in filters.
Was this block previously abused, and can you see the evidence? Who controls reverse DNS? Will ROAs and IRR objects be created? Can you get an LOA if you announce it yourself? Geofeed is the fifth — without it, geo databases improvise.
Filtering handles floods and request volume. It does not fix a compromised application, an unpatched CMS or a login endpoint with no rate limit. If the traffic is small and targeted, the bug is usually in your code.
Who calls whom, what gets blackholed, what the thresholds are, and who can decide at 3 a.m. An hour spent on this is worth more than any dashboard nobody watches.
Yes — policy, filters, communities and traffic engineering. If something is outside our scope, we will say so instead of billing hours on it.
Transit migrations, peering turn-ups and ASN build-outs, priced as engineering time with the scope agreed in writing first.
Yes, alongside IPv4 with the same object hygiene — a /48 or larger is usually the sensible starting point.
bgp.tools and PeeringDB carry current data for AS209101; both are linked from the AS209101 page.
Ports and commits, address space, racks, or a routing question you want a second opinion on. You get an answer from an engineer, with numbers attached.
