Address update causing infinite loop

[Maria Matejka]

Nice, gonna check whether it happens in my case. Thanks for your report, I'll let you know if i need anything more from you.

Maria

On 20 October 2024 23:25:46 GMT-04:00, benli ye <danielbenliye at gmail.com> wrote:
>Hi!
>
>Yes, you are right. Only one thing that I need to correct is that address which is repeated added and deleted is not the next hop address, it’s just a normal address on the interface.
>I will try to make it reproduce easily.
>
>Thanks,
>Daniel 
>
>
>> On Oct 18, 2024, at 21:03, Maria Matějka <mq at jmq.cz> wrote:
>> 
>> Hi!
>> 
>> On Fri, Oct 18, 2024 at 08:50:18PM +0800, benli ye wrote:
>> 
>> Thanks for your response. I have reproduced this issue in our test environment. However, it may not be easy to reproduce again.
>> 
>> Our bird conf example: (image) I have make a shell script to add and remove an IP address of an interface repeatedly. Somehow, I get a 100% cpu issue for bird.
>> 
>> So basically, before we dive into it.
>> 
>> a device and kernel protocol
>> a static protocol with lots of multipath routes
>> repeatedly adding and deleting one of the nexthop addresses at the interface
>> everything else seems irrelevant
>> Do I understand that correctly?
>> 
>> The reason why I’m asking – we need to catch the bug way earlier than when it hangs, as the hang is a symptom. The direct cause is somewhere else and it’s hard to find where without an actual reproducer.
>> 
>> Thanks,
>> Maria
>> 
>> –
>> Maria Matejka (she/her) | https://maria.jmq.cz/
>> 
>

-- 
Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
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