In the past we had packet loss issues due SIP's PLIM buffer. The following docs may provide some guidance:
https://www.cisco.com/c/en/us/support/docs/routers/asr-1000-series-aggregation-services-routers/200674-Throughput-issues-on-ASR1000-Series-rout.html https://www.cisco.com/c/en/us/td/docs/interfaces_modules/shared_port_adapters/configuration/ASR1000/asr1000-sip-spa-book/asr-spa-pkt-class.html -- Tassos On 27/11/21 02:11, Fiona Weber via NANOG wrote: > > 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 >>
