[Bismark-devel] some 6to4 testing
Dave Taht
d at taht.net
Tue Apr 12 10:35:38 EDT 2011
I've had a chance to do some basic testing of the most recent build of
bismark at eric's place.
The good news: Most everything works great.
So, after getting 6to4 to work
(see: http://www.bufferbloat.net/issues/80 )
And having a few ongoing issues with multicast (still - see bug #81)
I did a bit of performance testing using iperf, over the wired interface.
I was seeing about 20% difference in speed on these two tests over
comcast, between the 2002 and 2001 networks. Over FIOS... well....
IPv4 TEST:
d at cruithne:~$ iperf -t 60 -c huchra.bufferbloat.net
------------------------------------------------------------
Client connecting to huchra.bufferbloat.net, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.181 port 56963 connected with 149.20.54.237 port 5001
[ 3] 0.0-60.0 sec 176 MBytes 24.5 Mbits/sec
d at cruithne:~$ iperf -t 60 -V -c huchra.bufferbloat.net
------------------------------------------------------------
Client connecting to huchra.bufferbloat.net, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 2002:47a2:f305:1::2 port 34130 connected with
2001:4f8:3:36:2e0:81ff:fe49:2cfe port 5001
[ 3] 0.0-63.6 sec 3.48 MBytes 459 Kbits/sec
It's about 165 ms to huchra via the nearest 6to4 router on FIOS (vs
about 85ms on ipv4). BUT WOW, what a hit for "native <-> 6in4"! Factor
of 53 difference.
Going pure 6in4 replicates the result ratio I was getting with comcast:
d at cruithne:~$ iperf -V -t 60 -c 2002:9514:3640:36:2e0:81ff:fe23:90d3
------------------------------------------------------------
Client connecting to 2002:9514:3640:36:2e0:81ff:fe23:90d3, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 2002:47a2:f305:1::2 port 37667 connected with
2002:9514:3640:36:2e0:81ff:fe23:90d3 port 5001
^[[B[ 3] 0.0-60.2 sec 160 MBytes 22.3 Mbits/sec
Which basically accounts for the size of the ack packets being larger
and leveraging the existing ipv4 routing scheme.
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