[mat-wg] BGPlay repeated reannouce events

On Fri, Dec 4, 2015 at 7:13 PM, Massimo Candela <mcandela at ripe.net> wrote:

> Yes, it happens sometimes that prefixes are announced multiple times or periodically.
> What you see there is just what our route collectors received.
>

Thanks for verifying that. What can cause a bgp process to keep
announcing the same prefix (every 30s in this case)?


Yang

On Fri, Dec 4, 2015 at 7:13 PM, Massimo Candela <mcandela at ripe.net> wrote:
> Hello Yang,
>
>
>> On 04 Dec 2015, at 08:17, Yang Yu <yang.yu.list at gmail.com> wrote:
>>
>> Hello,
>>
>> I noticed in BGPlay the same reannouce event continuously repeats
>> itself every 30s. Is this an expected behavior?
>
> Yes, it happens sometimes that prefixes are announced multiple times or periodically.
> What you see there is just what our route collectors received.
>
> For this reason there is the option “ignore re-announcements” in the query panel (click the wrench).
> All the periodic announcements not introducing or changing anything in the scene will be filtered.
>
> Best regards,
> Massimo
>
>>
>> https://stat.ripe.net/widget/bgplay#w.resource=AS62041
>>
>> Type: A > reannounce Involving: 2001:67c:4e8::/48
>> Short description: The route 31019 30071 6762 62041 has been announced again
>> Path: 31019, 30071, 6762, 62041,
>> Date and time: 2015-12-03 23:50:02 Collected by: 03-2001:7f8:13::a503:1019:1
>>
>>
>>
>> Yang
>>
>