Re: IPv6 Throughput results
Alvin,
What are the routers in the middle? There are many routers that do IPv6
routing in software rather than hardware (only some Cisco models do IPv6 in
hardware last I checked.)
Can you check to see if the routers in your path are doing IPv6 in hardware?
On Mon, Apr 26, 2004 at 05:49:13PM -0500, Dixon, Alvin wrote:
> Has anyone had problems with getting lower TCP throughput results for IPv6
> compared to IPv4 using IPERF between Windows machines connected to separate
> routers?
>
> Currently, I am testing within the lab. The configuration is as follows:
>
> Win XP<--->Router1<--->Router2<--->Router3<--->Win 2k3
>
> Each machine is directly connected to a Fast Ethernet interface on separate
> routers. Each router connects to a common router via Fast Ethernet. So we
> are talking about a 100 M path and 3 router hops between hosts. Everything
> is local so we are looking at < 1 msec delay. Each host network interface,
> as well as router interface is configured with both IPv4 and IPv6 addresses.
> We are currently doing native IPv6 only. I am running IPERF v1.7.0 on both
> machines.
>
> I get about 50 Mb/s using IPv6 compared to about 95 Mb/s using IPv4. If I
> put the two machines in the same subnet and connect them to a common switch
> (as shown below) I get about 94 Mb/s for both IPv4 and IPv6.
>
> Win XP<--->Fast Ethernet Switch<--->Win 2k3
>
>
>
> thanks,
>
> alvin
>
>
--
Jon Dugan | Senior Network Engineer, NCSA Network Research
jdugan --at-- ncsa.uiuc.edu | 269 CAB, 605 E Springfield, Champaign, IL 61820
217-244-7715 | http://www.ncsa.uiuc.edu/~jdugan/