Latency/Packet Loss on ASR1006

Fri Nov 26 19:34:15 UTC 2021

https://www.cisco.com/c/en/us/support/docs/routers/asr-1000-series-aggregation-services-routers/200674-Throughput-issues-on-ASR1000-Series-rout.html

So many years since I have used an asr1000 but, honestly you have an esp40 in a box with 10x10G interfaces? That’s a very underpowered processor for that job. The ESP40 was designed for a box that would have 1G interfaces and perhaps a couple of 10’s. The ASR1000 is a CPU based box, everything goes back to the processor and remember cisco math means half duplex not full.

From: NANOG <nanog-bounces+tony=wicks.co.nz at nanog.org> On Behalf Of Colin Legendre
Sent: Saturday, 27 November 2021 8:09 am
To: nanog <nanog at nanog.org>
Subject: Latency/Packet Loss on ASR1006

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/20211127/163d9539/attachment.html>