Performance very simple example versus full blown router

[Brecht Vermeulen]

Robert,

thanks for your quick answer, I'll try to give more details :

On Mon, 7 Aug 2000, Robert Morris wrote:

> Brecht,
> 
> I'm trying to reproduce your Click configuration.
> 
> What kind of traffic were you sending through the router? TCP?  If
> something else, how did you control the bit-rate? I don't know
> anything about the Smartbits...
UDP packets from port 20000 to port 20000 (so this is only one way,
therefore I only need the one way configuration).
The SmartBits is a test instrument which can send and count different
streams :
Netcom Systems award-winning SmartBits systems are the industry
  standard for network performance analysis for 10/100/Gigabit Ethernet,
 100/1000 Mbps Ethernet over Copper, ATM, VoIP, Packet over SONET, Frame
        Relay, xDSL, Cable Modem, MulticastIP, and TCP/IP
(www.netcomsystems.com)


> The simple configuration you sent us supports only traffic in one
> direction (ie from eth2 to eth3, but not from ethe to eth2); is that
> exactly the configuration you used?
yes, because I wanted to know the maximum one way throughput

> How many packets per second was the router able to forward at 70
> Mbit/second? At 100 Mbit/second?

load(Mbit) Packets
         sent   received dropped loss(%) out of order
10.0000	148809	148809	0	0.0000	0
20.0000	297619	297619	0	0.0000	0
30.0000	446428	446428	0	0.0000	0
40.0000	595238	595238	0	0.0000	0
50.0000	744047	743967	80	0.0108	4
60.0000	892857	892857	0	0.0000	0
70.0000	1041666	991435	50231	4.8222	26090
80.0000	1190476	977140	213336	17.9202	74636
90.0000	1339285	981807	357478	26.6917	88816
100.0000	1488095	981948	506147	34.0131	90654

(this measurements are for 10 seconds, so in the first, there are sent
14881 packets per second, 14881* (64*8+96+64=672bits)=10 Mbit/s)

For the full blown router I get :
10.0000	148809	148805	4	0.0027	1
20.0000	297619	297619	0	0.0000	0
30.0000	446428	446397	31	0.0069	4
40.0000	595238	595238	0	0.0000	0
50.0000	744047	744047	0	0.0000	0
60.0000	892857	892627	230	0.0258	6
70.0000	1041666	1041651	15	0.0014	4
80.0000	1190476	1190402	74	0.0062	14
90.0000	1339285	1285770	53515	3.9958	40009
100.0000	1488095	1281286	206809	13.8976	120966

so only 3,99 and 13,8 % loss in 90 and 100 Mbit (also 64 byte frames)

> When you say 64 byte frames, are you including Ethernet header?  Are
> you including the Ethernet preamble? CRC32? (I want to calculate how
> much throughput you should expect to see.)
64 byte including ethernet header and CRC, ip header, udp header and data,
not including preamble.

best regards,
Brecht