Specifications

37
•Average per-packet latency in microseconds when performing Layer 2 switching and Layer 3 routing. These
values shown are listed for both First-In-First-Out (FIFO) and Last-In-First-Out (LIFO) processing. The LIFO values
represent the packet transmit time, whereas the FIFO values include the switch decision time and the packet
transmit time.
•Percentage of packets dropped in a full mesh configuration; 0% in all cases.
The following measurements were performed by ProCurve using test equipment manufactured by Ixia
Communications (www.ixiacom.com). In these tests, the maximum number of supported ports on the ProCurve
6600 switch was used. Proportional performance results at 100% of throughput are achieved on the ProCurve
6600 Switch Series for the maximum number of ports supported by each models. The 1-Gbps table is not
applicable to the 6600-24XG switch because only 10-Gb ports are supported.
10 Gbps Throughput %
Packets per
second
Full mesh
% drops
Latency (FIFO) Latency (LIFO)
Packet size L2/L3 L2/L3 L2 (ms) L3 (ms) L2 (ms) L3 (ms)
64
1
100 14880952 0 2.36 3.46 2.30 3.40
128 100 8445946 0 2.53 3.58 2.40 3.45
256 100 4528986 0 2.875 3.8 2.68 3.61
512 100 2349624 0 3.49 4.24 3.10 3.85
1024 100 1197318 0 4.80 5.14 3.98 4.32
1280 100 961538 0 5.47 5.6 4.42 4.55
1518 100 811688 0 6.00 6.00 4.00 4.78
1 Gbps Throughput %
Packets per
second
Full mesh
% drops
Latency (FIFO) Latency (LIFO)
Packet size L2/L3 L2/L3 L2 (ms) L3 (ms) L2/L3 L2/L3
64 100 1488095 0 3.38 3.38 2.84 2.84
128 100 844595 0 4.02 4.02 2.99 2.99
256 100 452899 0 5.14 5.14 3.09 3.09
512 100 234962 0 7.42 7.42 3.32 3.32
1024 100 119732 0 12.06 12.06 3.86 3.86
1280 100 96154 0 14.3 14.3 4.04 4.04
1518 100 81274 0 16.42 16.42 4.27 4.27
1
See the explanation about 10-Gb performance traffic patterns in the next section.
Table 7: 6600 series throughput performance
10-Gb performance traffic patterns
In Table 7, the performance levels for 10-Gb ports assume the underlying traffic patterns reflect either one of
the following minimum conditions to achieve wire-speed throughput:
•A single source traffic stream with an average packet size of 88 bytes or larger
•Two or more source traffic streams of any packet size down to the minimum value of 64 bytes
In the unlikely case where the average packet size is consistently smaller, the throughput will be less than wire
speed. For example, consider a worst-case scenario, where the average packet size is 64 bytes. This would
result in a throughput of approximately 70% to 80% of the rated wire-speed capacity. ProCurve considers
such minimum-sized, packet traffic scenarios being realized over an extended period of time to be extremely
atypical and unlikely to be experienced by customers in the field.
Note: The limits described here do not apply to Gigabit ports.