No route to some AS nets from AS3320 (DTAG)

Marco Moock mm at
Sat Apr 27 21:07:05 CEST 2024

Am 19.04.2024 um 09:36:25 Uhr schrieb Elmar K. Bins:

> I suppose one of the 3320 people will jump in and explain.

They did by email via their peering contact info in whois.

|we create IPv6 prefix filters for all bgp sessions on our edge routers,
|also for peers. We learn AS394018 routes via AS6461 and create our
|filters based on the AS6461 AS-Set.

|In this case we have used "RIRS" and not "ARIN" to resolve their
|AS-SET. Now i have added IRR ARIN additional and get the prefix for

Now routing works fine from AS3320.

kind regards

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