[j-nsp] Junos 20 - slow RPD

Mihai mihaigabriel at gmail.com
Fri Mar 25 05:21:55 EDT 2022


In my case I just upgraded one MX204 in the lab to 21.2R2, enabled 
rib-sharding and increased the JunosVM memory to 24G and things look 
better now.


On 25/03/2022 00:58, Gustavo Santos via juniper-nsp wrote:
> Hi,
> I think that I was the only one with this issue.
> 
> Even with a  RE-S-X6-64G.  We have very slow outbound updates. sending a
> lot of fullrouting tables to customers may take upto 60 minutes or more
> when you
> have a lot of BGP groups , for instance, one group per customer ...  and if
> the we have an issue with the preferred upstream provider, the customer
> routers may me offline
> until all updates are sent..
> 
> We got new routers and we are going to try Junos 20.4R3 latest service
> release with update threading and rib-sharding to see if we get some
> improvement, it is better to lost NSR than blackhole
> traffic for over an hour..
> 
> 
> 
> Em qua., 23 de mar. de 2022 às 06:41, Mark Tinka via juniper-nsp <
> juniper-nsp at puck.nether.net> escreveu:
> 
>>
>>
>> On 3/22/22 22:42, Mihai via juniper-nsp wrote:
>>
>>>
>>> Hi Saku,
>>>
>>> The routes are in VRF so no support for rib-sharding unfortunately.
>>> This MX204 is running 20.2R3-S3 so probably the only option is to try
>>> another version.
>>
>> We've had some terrible experiences with RPD due to NSR sync. to re1 for
>> BGP, on an RE-S-1800 running Junos 20.4R3.8. Turns out the code can't
>> deal with grouping outbound updates to eBGP neighbors at scale for that
>> RE, which crashes RPD on re1.
>>
>> The options were to either disable NSR, rewrite our outbound policies
>> and combine multiple customers in the same outbound group, or get more
>> memory. We went for the last option.
>>
>> No more problems on the RE-S-X6-64G.
>>
>> Juniper have some work to do to optimize the code in these use-cases.
>>
>> Mark.
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