Latency/Packet Loss on ASR1006

Sat Nov 27 00:11:36 UTC 2021

Hi

we see similar problems on ASR1006-X with ESP100 and MIP100. At about 
~45 Gbit/s of traffic (on ~30k PPPoE Sessions and ~700k CGN sessions) 
the QFP utilization skyrockets from ~45 % straight to ~95 % :(
I don't know if it's the CGN sessions or the traffic/packets causing the 
load increase, the datasheet says it supports something like 10M 
sessions.... but maybe not if you really intend to push packets through it?
We have not seen such spikes with way higher pps, but lower CGN session 
count, when we had DDoS Attacks against end customers.

Fiona

On 11/26/21 20:09, Colin Legendre wrote:
> Hi,
>
> We have ...
>
> ASR1006  that has following cards...
> 1 x ESP40
> 1 x SIP40
> 4 x SPA-1x10GE-L-V2
> 1 x 6TGE
> 1 x RP2
>
> We've been having latency and packet loss during peak periods...
>
> We notice all is good until we reach 50% utilization on output of...
>
> 'show platform hardware qfp active datapath utilization summary'
>
> Literally ... 47% good... 48% good... 49% latency to next hop goes 
> from 1ms to 15-20ms... 50% we see 1-2% packet-loss and 30-40ms 
> latency... 53% we see 60-70ms latency and 8-10% packet loss.
>
> Is this expected... the ESP40 can only really push 20G and then starts 
> to have performance issues?
>
>
>
> ---
> Colin Legendre
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.nanog.org/pipermail/nanog/attachments/20211127/23ecc0dd/attachment.html>