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grzes
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Posts: 5
Joined: Fri Mar 21, 2014 9:17 pm

Slow pptp connection when crs125 works as vpn client

Mon Mar 09, 2015 9:42 pm

Hello,

i have a problem with crs125. Everything what i can get from that device is a 15Mbit/sec link using pptp.
Ok, few words about environment.

Scenario1: server -> rb2011 -> PPTP over internet -> crs125 -> my laptop
We have a machine behind RB2011 router in remote location. In my current location (home) i am with my laptop behind CRS125. Speed is limited to 15mbit/sec.

rb2011 profile:
[admin@CERBER] > tool profile 
NAME                    CPU        USAGE
pptp                    all         0.5%
ethernet                all        17.5%
console                 all         0.5%
graphing                all           0%
flash                   all           0%
dns                     all         2.5%
firewall                all           9%
networking              all         4.5%
gre                     all           0%
winbox                  all           0%
logging                 all           0%
management              all           1%
idle                    all        61.5%
telnet                  all           0%
bridging                all         1.5%
unclassified            all         1.5%
CRS125 profile:
[admin@CRS125-24G-1S-2HnD] > tool profile 
NAME                    CPU        USAGE
pptp                    all           0%
wireless                all           0%
www                     all           0%
ethernet                all          19%
console                 all         0.5%
graphing                all           0%
dns                     all         0.5%
firewall                all          13%
networking              all        12.5%
gre                     all           0%
winbox                  all         5.5%
management              all           6%
idle                    all          40%
profiling               all           1%
queuing                 all         1.5%
telnet                  all           0%
bridging                all           0%
unclassified            all         0.5%
Scenario 2: server -> RB2011 -> internet -> crs125 -> my laptop (pptp client)
When i'am using my laptop as pptp client i can get 40Mbit/sec. As we can see below, rb2011 is fully loaded.

Profile on RB2011
[admin@CERBER] > tool profile 
NAME                    CPU        USAGE
ppp                     all           0%
pptp                    all           4%
ethernet                all        49.5%
ntp                     all           0%
console                 all         0.5%
dns                     all         0.5%
firewall                all        25.5%
networking              all           7%
gre                     all           0%
winbox                  all         0.5%
logging                 all           0%
management              all         1.5%
routing                 all           0%
idle                    all         7.5%
dhcp                    all         0.5%
profiling               all           0%
bridging                all           3%
unclassified            all           0%
So why when I use the vpn client in crs125 i can't get more than 15mbit/sec even though it is loaded only in 60%?
What am I doing wrong? Do you need any information about configurations?

Regards
grzes


UPDATE:
Last night backups. Blue are outgoing transfers. First (at 01:00am) is to some tp-link and the second (at 03:00am) is the crs125. For both rb2011 was working as pptp server.
byzuch-Gi1_0_1-traffic-1e0c7-1.png
CPU usage for rb2011
rb2011-cpu-daily.gif
CPU usage on crs125
crs125-cpu-daily.gif
I can not understand why crs125 is so slow, both remote locations have a link 100mbit to the internet. Laptop behind crs125 connected to rb2011 as pptp client can transfer much more than 15mbit/s.

Regards
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grzes
just joined
Topic Author
Posts: 5
Joined: Fri Mar 21, 2014 9:17 pm

Re: Slow pptp connection when crs125 works as vpn client

Sun Aug 09, 2015 11:29 am

Never mind. Checked ccr1009 -> rb2011, 50Mbit/s without problems. Right now link is limited with rb2011 performance but its ok for me. Why rb2011 can do using pptp 50Mbit and ccr125 only 15Mbit we will propably never know. Thanks mikrotik for not sharing such information with customers. Same cpu&architecture? Yeah...

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