Specifications

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Interface Tested:
Gigabit Ethernet
Test Date: 5/26/99
router router router router input output input output
input bps output bps input pps output pps ethernet ethernet preamble preamble
Packet Size
overhead overhead overhead overhead
48 476563200 476575360 1489260 1489298 214453440 214458912 95312640 95315072
64 547603504 547612336 1488053 1488077 214279632 214283088 95235392 95236928
120 728553360 728565600 892835 892850 128568240 128570400 57141440 57142400
128 743216320 743227760 844563 844577 121617072 121619088 54052032 54052928
256 862289232 862304464 452883 452891 65215152 65216304 28984512 28985024
300 881218416 881231952 390611 390617 56247984 56248848 24999104 24999488
512 928542160 928554016 234955 234958 33833520 33833952 15037120 15037312
1024 963570944 963587040 119728 119730 17240832 17241120 7662592 7662720
1500 974978160 974990016 82235 82236 11841840 11841984 5263040 5263104
mix 736086152 736104904 868026 868048 124995744 124998912 55553664 55555072
input output input output
ipg ipg input bps output bps percent percent
Packet Size
overhead overhead total total line rate line rate
48 142968960 142972608 929298240 929321952 0.929298 0.929322
64 142853088 142855392 999971616 999987744 0.999972 0.999988
120 85712160 85713600 999975200 999992000 0.999975 0.999992
128 81078048 81079392 999963472 999979168 0.999963 0.999979
256 43476768 43477536 999965664 999983328 0.999966 0.999983
300 37498656 37499232 999964160 999979520 0.999964 0.999980
512 22555680 22555968 999968480 999981248 0.999968 0.999981
1024 11493888 11494080 999968256 999984960 0.999968 0.999985
1500 7894560 7894656 999977600 999989760 0.999978 0.999990
mix 83330496 83332608 999966056 999991496 0.999966 0.999991
Field Descriptions
Packet Size Size of packet generated by Smartbits traffic simulator.
Router Input BPS Bits per second received by test interface (excludes layer 1/2 overhead)
Router Output BPS Bits per second transmitted by test interface (excludes layer 1/2 overhead)
Router Input PPS IP Packets per second received by test interface
Router Input PPS IP Packets per second transmitted by test interface
Input Ethernet Ohead Input Ethernet overhead per packet (18 bytes)
Output Ethernet Ohead Output Ethernet overhead per packet (18 bytes)
Input Preamble Ohead Input Preamble overhead per packet (8 bytes)
Output Preamble Ohead Output Preamble overhead per packet (8 bytes)
Input InterPacket Gap Input InterPacket Gap overhead per packet (12 bytes)
Output InterPacket Gap Output InterPacket Gap overhead per packet (12 bytes)
Input BPS Total Aggregate BPS of IP packet + Ethernet overhead + Preamble overhead + IPG overhead
Output BPS Total Aggregate BPS of IP packet + Ethernet overhead + Preamble overhead + IPG overhead
Input percent Line Rate "Input BPS Total" / clock rate of GbE = Input percent Line Rate
Output percent Line Rate "Output BPS Total" / clock rate of GbE = Output percent Line Rate
Note: 48-byte Ethernet packet is an illegal runt packet per RFC 1242 and 1944.