PPPoE server and performance of HW

RouterOS General
1

Hi all,

we have up to 800 active PPPoE connections and our P4 2500MHz router is on 90% of CPU utilization. Can you advice better HW solution for up to 2000 PPPoE connections?

2

  • Do you use local list of PPP SECRET or RADIUS ?
    if not radius .. DO RADIUS!! :slight_smile:

  • Can you distribute that PPPoE user on 3-4-5 server ?
    one group of AP on one … other AP on second etc

  • Do you have graphics on or off… ?
    doing mass user (800) graphics … it’s taking some CPU :slight_smile:

3

90% CPU just means that you have not wasted money on this CPU and it is efficiently doing it’s job. Unless you have some majour stability problems, this is not to be worried about.

4

hi trtmrt

  • Yes, we use radius
  • I do not think it is a good idea to install more PPPoE servers due to effective afregation, also big aDSL providers use thousands of users per one DC
  • do you mean if I have opened WinBox and active PPP connection? No.

hi normis
you think just to use higher CPU?

5

no, i think that all is fine. 90% means just that CPU is working. it does NOT mean that there is some problem.

6

923 online end users, cpu varies between 28% during idle periods and 72% (average: 45%) at peak periods. 33.45 mbit + 21.37 mbit peak periods.

There are many myths around DSL. DSL does not mysteriously uphieve bad network structure :smiley:

7

and what HW do you use?

8

rastod, please undestand that the CPU usage % does not mean anything. do you think you will have some kind of performance increase if you will see 20% instead of 90% ? no! it will work just the same. please stop treating these numbers as if they were something critical.

9

i do mean mrtg(or what ever MT use) working in background and making graphics of each queue that each pppoe session has made…

10

single 2.6 ghz xeon with 512kb cache and two intel ether cards.
512 mb ddr memory.

11

Hmm… so if I have 100 online users and about 50 Mbps download /60 Mbps upload on the pppoe interface of MT and a cpu load at 70% it is normal?Because it begins to worry me.
MT hardware is a 3 G Intel P4, 1 G RAM, Intel giga network cards.
If CPU usage means nothing how should I know when MT cannot handle more traffic?Because I should now before it happens.:wink:
thanks

12

Himm,
As i read document Mikrotik don’t support SMP architecture.
I think if you use PPPoE and pass high BW on it its possible to spend much of CPU time. Also this time of traffic have lot of
BW cosumption things like P2P. So if PPPoE server pass lot of flow on it CPU time may higer.
So if you upgrade your CPU more powerfull one like Xeon’s
you may get good results.

Also i wonder that if mikrotik support SMP near future?
Because as you know new architectures not upgrade their
speed they multiple their cores..:slight_smile:

So in near featue we need SMP aware Mikrotik
devrim

13

MikroTik already stated that there will be SMP support in V3.

Best regards,
Christian Meis

14

The MT was creating for each connection a simple queue.After setting no speed limit , so there is no queue for each connection, CPU load is at 30%-40% and I think it will raise a bit slower as the BW gets higher.

15

if you don’t need to perform NAT, or satefull firewall (for ex. p2p mark), just disable connection tracking - you will lower utilization from 10% to even 80%