Specifications

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Interface Tested:
OC3 ATM
Test Date: 5/26/99
router router router router input output input bps output bps
input bps output bps input pps output pps # of cells # of cells without without
Packet Size
per packet per packet sonet ohead sonet ohead
48 56512320 56512000 176601 176600 2 2 149757648 149756800
64 64988800 64988800 176600 176600 2 2 149756800 149756800
120 96070944 96070128 117734 117733 3 3 149757648 149756376
128 103605920 103605920 117734 117734 3 3 149757648 149757648
256 111993280 111993280 58820 58820 6 6 149638080 149638080
300 113738496 113738496 50416 50416 7 7 149634688 149634688
512 126890816 126890816 32108 32108 11 11 149751712 149751712
1024 129145760 129145760 16046 16046 22 22 149677088 149677088
1500 130854672 130854672 11037 11037 32 32 149750016 149750016
mix 64988432 68988800 176599 176600 2 2 149755952 149756800
input output input output
sonet sonet input bps output bps percent percent
Packet Size
overhead overhead total total line rate line rate
48 5760000 5760000 155517648 155516800 0.999985 0.999979
64 5760000 5760000 155516800 155516800 0.999979 0.999979
120 5760000 5760000 155517648 155516376 0.999985 0.999977
128 5760000 5760000 155517648 155517648 0.999985 0.999985
256 5760000 5760000 155398080 155398080 0.999216 0.999216
300 5760000 5760000 155394688 155394688 0.999194 0.999194
512 5760000 5760000 155511712 155511712 0.999947 0.999947
1024 5760000 5760000 155437088 155437088 0.999467 0.999467
1500 5760000 5760000 155510016 155510016 0.999936 0.999936
mix 5760000 5760000 155515952 155516800 0.999974 0.999979
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 Cells per Packet Number of ATM cells required to carry IP Packet
Output Cells per Packet Number of ATM cells required to carry IP Packet
Input BPS without SONET Bits per Second Input based on AAL5 (IP packet, cell filler and cell tax)
Output BPS without SONET Bits per Second Output based on AAL5 (IP packet, cell filler and cell tax)
Input SONET Ohead Input overhead for SONET line framing
Output SONET Ohead Output overhead for SONET line framing
Input BPS Total Aggregate BPS of IP packet + ATM overhead + SONET overhead
Output BPS Total Aggregate BPS of IP packet + ATM overhead + SONET overhead
Input percent Line Rate "Input BPS Total" / clock rate of wire (155520000) = Input percent Line Rate
Output percent Line Rate "Output BPS Total" / clock rate of wire (155520000) = Output percent Line Rate