Hi,
I'm trying to determine if the performance I'm seeing between two
OpenBSD 5.1 IPSEC VPN endpoints is typical (or expected). I recognize
there are quite a few variables to consider and I'm sure I've not
toggled each one but I could use a sanity check regardless.
Question:
With the configuration below when I disable ipsec I can route traffic
between the two hosts (hosts A and B) at about 900mbps. When I add the
VPN I am getting speeds of approx. 40mbps. The CPU load on the OpenBSD
boxes spikes to about 80% on one of the cores but the other 3 are
essentially unaffected. Enabling/Disabling AES-NI in the bios doesn't
seem to actually do anything as the cpu message in dmesg still shows the
AES flag.
The test I'm using is this
Host A:
# nc -v -l 12345 | /dev/null
Host B:
# dd if=/dev/zero bs=1000 count=10000 | nc -v <host a> 12345
The reason these performance numbers are concerning to me is that I
wanted a solution that would allow me to get decent (a.k.a. 100mbps +/-
10%) without having to buy expensive cisco/juniper devices.
Am I dreaming or have others had better performance? Also, any recent
data on AES-NI optimizations would be helpful.
Thanks
Jim
Hardware Configuration:
- (2) identical SuperMicro systems with quad core E31220 w/ AES-NI enabled
cpu0: Intel(R) Xeon(R) CPU E31220 @ 3.10GHz ("GenuineIntel" 686-class)
3.10 GHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,NXE,LONG,SSE3,PCLMUL,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,x2APIC,POPCNT,AES,XSAVE,AVX,LAHF
cpu1: ..
cpu2: ...
cpu3: ...
- 2GB ram
- AES-NI enabled in bios
- (4) Intel PRO/1000 MT (82574L)
Software Configuration:
VPN A
/etc/iked.conf
ikev2 active esp \
from 172.16.1.0/24 to 172.16.2.0/24 \
local 10.0.0.1 peer 10.0.0.2 \
ikesa enc aes-256 auth hmac-sha2-512 group modp4096 \
childsa enc aes-256-gmac \
psk "helpmeplease"
VPN B
(reverse of A config)
Host A -> 172.16.1.2 (behind VPN A)
Host B- > 172.16.2.2 (behind VPN B)
VPN A (10.0.0.1) talks to B (10.0.0.2) via a crossover cable.
No switches/routers/hubs/etc in this test system. All hosts running
linux with 1000mb phys.
