[Swan] Bandwidth problem
Paul Wouters
paul at nohats.ca
Mon Aug 1 01:41:57 UTC 2016
I will double check the kernel sources and update the man page if needed.
Thanks,
Paul
Sent from my iPhone
> On Jul 31, 2016, at 9:28 PM, Jobst Schmalenbach <jobst at barrett.com.au> wrote:
>
> Paul
>
> you might want to update the manuals if you say that 128 is possible:
> In https://libreswan.org/man/spi.8.html it is written:
>
> --replay_window replayw
> sets the replay window size; valid values are decimal, 1 to 64
>
>
>
> Jobst
>
>
>
>
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>> On 01/08/2016 02:12, Paul Wouters wrote:
>> Try libreswan-3.18 with replay-window=64 (or 128)
>>
>> Paul
>>
>> Sent from my iPhone
>>
>>> On Jul 27, 2016, at 11:09, Renzo Dani <arons7 at gmail.com> wrote:
>>>
>>> Hi,
>>> we have a vpn tunnel between two offices, both have an internet connection of 100Mbps.
>>> Time to time we have serious issue with very poor bandwidth, the problem is not always present, some time we are experience a good bandwidth on the vpn too.
>>> So we are currently not able to identify the problem, we already contact the two Internet service providers but they simply reply they cannot identify any issue on their network.
>>>
>>> Iperf between the two vpn gateways using the tunnel (during problem occurs)
>>> [ ID] Interval Transfer Bandwidth
>>> [ 5] 0.00-1.00 sec 215 KBytes 1.76 Mbits/sec
>>> [ 5] 1.00-2.00 sec 195 KBytes 1.60 Mbits/sec
>>> [ 5] 2.00-3.00 sec 112 KBytes 920 Kbits/sec
>>> [ 5] 3.00-4.00 sec 115 KBytes 942 Kbits/sec
>>> [ 5] 4.00-5.00 sec 55.5 KBytes 454 Kbits/sec
>>> [ 5] 5.00-6.00 sec 44.7 KBytes 366 Kbits/sec
>>> [ 5] 6.00-7.00 sec 134 KBytes 1.10 Mbits/sec
>>> [ 5] 7.00-8.00 sec 108 KBytes 887 Kbits/sec
>>> [ 5] 8.00-9.00 sec 83.9 KBytes 687 Kbits/sec
>>> [ 5] 9.00-10.00 sec 100 KBytes 821 Kbits/sec
>>> [ 5] 10.00-10.03 sec 8.12 KBytes 2.02 Mbits/sec
>>> - - - - - - - - - - - - - - - - - - - - - - - - -
>>> [ ID] Interval Transfer Bandwidth
>>> [ 5] 0.00-10.03 sec 0.00 Bytes 0.00 bits/sec sender
>>> [ 5] 0.00-10.03 sec 1.14 MBytes 957 Kbits/sec receiver
>>>
>>> Iperf between the two vpn gateways using public internet ips at the same time as before
>>> [ ID] Interval Transfer Bandwidth
>>> [ 5] 0.00-1.00 sec 9.50 MBytes 79.7 Mbits/sec
>>> [ 5] 1.00-2.00 sec 11.2 MBytes 93.6 Mbits/sec
>>> [ 5] 2.00-3.00 sec 11.0 MBytes 92.5 Mbits/sec
>>> [ 5] 3.00-4.00 sec 11.1 MBytes 93.5 Mbits/sec
>>> [ 5] 4.00-5.00 sec 11.2 MBytes 93.6 Mbits/sec
>>> [ 5] 5.00-6.00 sec 11.2 MBytes 93.7 Mbits/sec
>>> [ 5] 6.00-7.00 sec 11.2 MBytes 93.7 Mbits/sec
>>> [ 5] 7.00-8.00 sec 11.2 MBytes 94.0 Mbits/sec
>>> [ 5] 8.00-9.00 sec 11.2 MBytes 93.9 Mbits/sec
>>> [ 5] 9.00-10.00 sec 11.2 MBytes 93.8 Mbits/sec
>>> [ 5] 10.00-10.04 sec 510 KBytes 93.6 Mbits/sec
>>> - - - - - - - - - - - - - - - - - - - - - - - - -
>>> [ ID] Interval Transfer Bandwidth
>>> [ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec sender
>>> [ 5] 0.00-10.04 sec 110 MBytes 92.2 Mbits/sec receiver
>>>
>>>
>>>
>>> Our config:
>>>
>>> config setup
>>> nat_traversal=yes
>>> oe=off
>>> protostack=netkey
>>> uniqueids=no
>>>
>>> conn our_vpn
>>> authby=secret
>>> disablearrivalcheck=no
>>> ....
>>> # PHASE 1
>>> aggrmode=no
>>> ike=aes256-sha2_256;modp3072
>>> ikelifetime=8h
>>> # PHASE 2
>>> type=tunnel
>>> phase2=esp
>>> phase2alg=aes-256-sha2_256;modp3072
>>> salifetime=2h
>>> pfs=yes
>>> auto=start
>>>
>>>
>>> Thanks for any help/suggestion
>>>
>>> Renzo
>>>
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