Hi, So recently I've come across an issue with a large ISP announcing a /22 and /25 of IPv6 space. We are currently filtering <28 and >48 which until now has worked fine for us. What are others using as their prefix filters in the DFZ? Thanks, Alistair
On Mon, Jan 16, 2017 at 10:01:00PM +0000, Alistair Mackenzie wrote:
So recently I've come across an issue with a large ISP announcing a /22 and /25 of IPv6 space. We are currently filtering <28 and >48 which until now has worked fine for us.
What are others using as their prefix filters in the DFZ?
The NTT global backbone (AS 2914) generally accepts (barring the other filters) IPv6 prefixes within "2000::/3 ge 12 le 48" over eBGP. Longer prefixes are only accepted on customer sessions, when a valid IRR route6 object exists. Kind regards, Job
On 1/16/17 2:01 PM, Alistair Mackenzie wrote:
Hi,
So recently I've come across an issue with a large ISP announcing a /22 and /25 of IPv6 space. We are currently filtering <28 and >48 which until now has worked fine for us.
What are others using as their prefix filters in the DFZ?
Currently the shortest prefix delegation to an RIR is a /12, the assigned global uni-cast range at present all fits within 2000::/3. I currently apply < 20, > /48 but I also have recourse to default.
Thanks, Alistair
participants (3)
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Alistair Mackenzie -
Job Snijders -
joel jaeggli