SW-504 RFC 2544 Test Report

This page presents the RFC 2544 benchmark test results for the Brainboxes SW-504 4-port unmanaged Fast Ethernet switch. RFC 2544 defines a standardised methodology for benchmarking network interconnect devices, covering throughput, latency, frame loss rate, and back-to-back frame handling.

Testing was performed using the Xena2544 v2.97 automated test suite on 9 February 2026, with a total test duration of 4 hours 49 minutes. All tests used IEEE default frame sizes (64, 128, 256, 512, 1024, 1280, and 1518 bytes) in a full-mesh, bidirectional topology across all 4 ports at 100 Mbps.

Result: All Tests Passed

The SW-504 passed all RFC 2544 tests. Throughput reached 99.7% of line rate with zero frame loss. Minor frame loss (< 0.002% per frame size) was observed in the frame loss test at 100% rate.

Test	Result
Throughput	Pass — 99.7% line rate, all frame sizes
Latency & Jitter	Pass — at 95% and 100% rates
Frame Loss Rate	Pass — 0% at 95% rate; < 0.002% at 100% rate
Back-to-Back	Pass — at 95% and 100% rates

Test Configuration

Parameter	Value
Topology	Mesh
Direction	Bidirectional
Frame Size Type	IEEE Default
Frame Sizes	64, 128, 256, 512, 1024, 1280, 1518 bytes
Port Count	4
Port Speed	100 Mbps (Auto-negotiated)
Test Tool	Xena2544 v2.97
Test Chassis	Abyssinian (S/N 2343912)
Module	Odin-1G-3S-6P (S/N 870628)

Port Configuration

Port ID	Interface Type	Speed	Rate
P-0-0-0	SFP-E 10/100/1000M	Auto	100 Mbps
P-0-0-1	SFP-E 10/100/1000M	Auto	100 Mbps
P-0-0-2	SFP-E 10/100/1000M	Auto	100 Mbps
P-0-0-3	SFP-E 10/100/1000M	Auto	100 Mbps

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Throughput Test

The throughput test determines the maximum rate at which none of the offered frames are dropped by the device. Each frame size was tested for 60 seconds over 3 iterations, with a binary search from 95–100% line rate and 0% acceptable loss.

The SW-504 achieved 99.688% throughput (within 0.3% of full line rate) for all frame sizes with zero frame loss.

Frame Size (bytes)	Offered Rate	Tx Rate (L1)	Tx Rate (L2)	Tx (Frames)	Rx (Frames)	Loss	Result
64	99.688%	398.75 Mbps	303.81 Mbps	35,602,560	35,602,560	0	Pass
128	99.688%	398.75 Mbps	344.86 Mbps	20,206,800	20,206,800	0	Pass
256	99.688%	398.74 Mbps	369.84 Mbps	10,835,280	10,835,280	0	Pass
512	99.688%	398.72 Mbps	383.73 Mbps	5,621,040	5,621,040	0	Pass
1024	99.688%	398.69 Mbps	391.05 Mbps	2,864,160	2,864,160	0	Pass
1280	99.688%	398.74 Mbps	392.60 Mbps	2,300,400	2,300,400	0	Pass
1518	99.688%	398.65 Mbps	393.47 Mbps	1,944,000	1,944,000	0	Pass

All 12 bidirectional port-to-port flows showed identical throughput with zero loss at every frame size.

Per-Port Throughput Results

Each port transmitted and received equally across all 3 destination ports. All 4 ports operated at 99.688% line rate with zero loss. Data shown is for port P-0-0-0; all other ports produced identical results.

Port P-0-0-0

Frame Size (bytes)	Tx (Frames)	Tx Rate (L1)	Tx Rate (L2)	Tx Rate (fps)	Rx (Frames)
64	8,900,640	99.69 Mbps	75.95 Mbps	148,344	8,900,640
128	5,051,700	99.69 Mbps	86.22 Mbps	84,195	5,051,700
256	2,708,820	99.68 Mbps	92.46 Mbps	45,147	2,708,820
512	1,405,260	99.68 Mbps	95.93 Mbps	23,421	1,405,260
1024	716,040	99.67 Mbps	97.76 Mbps	11,934	716,040
1280	575,100	99.68 Mbps	98.15 Mbps	9,585	575,100
1518	486,000	99.66 Mbps	98.37 Mbps	8,100	486,000

Ports P-0-0-1 through P-0-0-3 — identical results

All remaining 3 ports produced the same throughput, frame counts, and zero loss as P-0-0-0 above.

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Latency and Jitter Test

The latency and jitter test measures forwarding delay and its variation across frame sizes. Tests were run for 60 seconds over 3 iterations using last-to-last latency mode, relative to the throughput test results. Testing was performed at both 95% and 100% of line rate.

Results at 95% Rate

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)	Result
64	10.281	7.111	21.015	0.141	13.518	Pass
128	17.392	12.243	35.792	0.350	17.247	Pass
256	33.473	22.506	63.640	0.305	34.181	Pass
512	60.997	43.033	124.819	0.382	68.243	Pass
1024	109.859	84.086	251.531	0.770	167.108	Pass
1280	147.906	104.613	313.023	0.732	208.097	Pass
1518	180.973	123.793	370.330	0.833	246.152	Pass

Per-Port Latency and Jitter at 95% Rate

Port P-0-0-0

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.622	7.111	18.513	0.175	10.848
128	17.243	12.267	34.060	0.197	17.247
256	34.464	22.506	59.214	0.234	34.181
512	62.852	43.033	117.578	0.401	68.243
1024	109.675	84.110	251.531	0.955	167.108
1280	156.007	104.613	313.023	0.752	208.097
1518	182.885	123.793	370.330	0.872	246.152

Port P-0-0-1

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.042	7.111	19.716	0.175	8.563
128	17.482	12.243	35.792	0.188	14.216
256	33.254	22.506	63.640	0.217	23.429
512	58.738	43.033	108.341	0.381	52.463
1024	111.160	84.086	226.033	0.624	93.140
1280	153.489	104.613	312.999	0.735	208.097
1518	168.378	123.793	357.509	0.833	136.919

Port P-0-0-2

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.162	7.111	20.991	0.108	13.518
128	17.084	12.243	33.411	0.489	13.398
256	32.013	22.506	52.839	0.222	23.453
512	62.055	43.057	121.475	0.379	63.576
1024	105.251	84.086	214.824	0.564	93.115
1280	142.803	104.613	291.326	0.705	109.978
1518	177.855	123.793	343.581	0.847	136.101

Port P-0-0-3

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.297	7.135	21.015	0.104	13.518
128	17.758	12.267	33.459	0.527	13.422
256	34.162	22.554	58.684	0.545	25.233
512	60.343	43.081	124.819	0.365	63.215
1024	113.348	84.134	251.507	0.937	167.108
1280	139.324	104.637	279.659	0.737	121.765
1518	194.773	123.817	370.282	0.781	246.152

Results at 100% Rate

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)	Result
64	10.575	7.111	21.039	0.169	13.639	Pass
128	19.005	12.243	36.370	0.511	23.766	Pass
256	33.862	22.506	67.104	0.279	44.236	Pass
512	60.156	43.033	125.637	0.337	43.106	Pass
1024	121.550	84.086	243.064	0.562	84.408	Pass
1280	151.426	104.637	313.072	0.714	208.073	Pass
1518	190.977	123.793	370.306	0.800	246.176	Pass

Per-Port Latency and Jitter at 100% Rate

Port P-0-0-0

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.710	7.135	18.874	0.183	10.752
128	19.503	12.243	36.370	1.036	23.766
256	33.404	22.530	67.104	0.226	44.236
512	58.605	43.057	125.637	0.340	43.106
1024	113.561	84.086	211.047	0.545	84.384
1280	152.539	104.637	313.072	0.736	208.073
1518	217.141	123.793	370.306	0.817	246.152

Port P-0-0-1

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.872	7.111	20.461	0.104	11.883
128	18.566	12.243	33.651	0.166	12.291
256	34.279	22.506	66.743	0.314	43.923
512	62.698	43.033	125.084	0.371	42.937
1024	121.603	84.086	243.064	0.558	84.047
1280	155.655	104.637	310.858	0.718	162.080
1518	196.757	123.793	354.887	0.788	201.410

Port P-0-0-2

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.288	7.111	21.039	0.282	13.639
128	18.821	12.243	34.517	0.474	22.082
256	34.073	22.506	59.238	0.225	22.539
512	57.239	43.033	113.970	0.303	43.082
1024	133.526	84.110	212.587	0.579	84.384
1280	132.165	104.637	298.879	0.692	173.771
1518	159.735	123.793	330.207	0.709	124.242

Port P-0-0-3

Frame Size (bytes)	Avg Latency (us)	Min Latency (us)	Max Latency (us)	Avg Jitter (us)	Max Jitter (us)
64	10.429	7.135	20.991	0.106	13.542
128	19.129	12.267	36.105	0.366	23.742
256	33.691	22.530	63.014	0.349	22.515
512	62.082	43.057	116.280	0.332	42.985
1024	117.510	84.110	224.037	0.567	84.408
1280	165.345	104.637	299.553	0.708	118.758
1518	190.275	123.817	370.282	0.884	246.176

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Frame Loss Rate Test

The frame loss rate test measures the percentage of frames that are not forwarded by the device under steady-state conditions. Each frame size was tested for 60 seconds over 3 iterations. No pass/fail criteria were configured.

At 95% rate, the SW-504 achieved zero frame loss across all frame sizes. At 100% rate, a minor loss of less than 0.002% was observed at each frame size (1,139 total frames across all sizes).

Results at 95% Rate

Frame Size (bytes)	Tx (Frames)	Rx (Frames)	Tx Rate (L1)	Loss (Frames)	Loss Rate	Result
64	33,928,560	33,928,560	380.00 Mbps	0	0%	Pass
128	19,256,400	19,256,400	379.99 Mbps	0	0%	Pass
256	10,325,520	10,325,520	379.98 Mbps	0	0%	Pass
512	5,356,800	5,356,800	379.98 Mbps	0	0%	Pass
1024	2,729,520	2,729,520	379.95 Mbps	0	0%	Pass
1280	2,191,680	2,191,680	379.89 Mbps	0	0%	Pass
1518	1,852,560	1,852,560	379.90 Mbps	0	0%	Pass

Per-Port Frame Loss at 95% Rate

All 4 ports transmitted and received equal frame counts with zero loss at 95% rate.

Port P-0-0-0

Frame Size (bytes)	Tx (Frames)	Tx Rate (L1)	Tx Rate (fps)	Rx (Frames)
64	8,482,140	95 Mbps	141,369	8,482,140
128	4,814,100	95 Mbps	80,235	4,814,100
256	2,581,380	94.99 Mbps	43,023	2,581,380
512	1,339,200	94.99 Mbps	22,320	1,339,200
1024	682,380	94.99 Mbps	11,373	682,380
1280	547,920	94.97 Mbps	9,132	547,920
1518	463,140	94.97 Mbps	7,719	463,140

Ports P-0-0-1 through P-0-0-3 — identical results

All remaining 3 ports produced the same frame counts and zero loss as P-0-0-0 above.

Results at 100% Rate

Frame Size (bytes)	Tx (Frames)	Rx (Frames)	Tx Rate (L1)	Loss (Frames)	Loss Rate	Result
64	35,714,160	35,713,595	400.00 Mbps	565	< 0.002%	Pass
128	20,270,160	20,269,875	400.00 Mbps	285	< 0.002%	Pass
256	10,869,120	10,868,979	399.98 Mbps	141	< 0.002%	Pass
512	5,639,040	5,638,970	400.00 Mbps	70	< 0.002%	Pass
1024	2,873,520	2,873,487	399.99 Mbps	33	< 0.002%	Pass
1280	2,307,600	2,307,576	399.98 Mbps	24	< 0.002%	Pass
1518	1,950,480	1,950,459	399.98 Mbps	21	< 0.002%	Pass

Per-Port Frame Loss at 100% Rate

At 100% rate, each port experienced a small number of lost frames distributed evenly across all flow combinations.

Port P-0-0-0

Frame Size (bytes)	Tx (Frames)	Tx Rate (L1)	Tx Rate (fps)	Rx (Frames)
64	8,928,540	100 Mbps	148,809	8,928,398
128	5,067,540	100 Mbps	84,459	5,067,467
256	2,717,280	100 Mbps	45,288	2,717,244
512	1,409,760	100 Mbps	23,496	1,409,742
1024	718,380	100 Mbps	11,973	718,371
1280	576,900	100 Mbps	9,615	576,894
1518	487,620	99.99 Mbps	8,127	487,614

Ports P-0-0-1 through P-0-0-3

All remaining ports showed the same pattern, with a small number of lost frames evenly distributed across all flow combinations. Total loss across all 4 ports: 1,139 frames.

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Back-to-Back Test

The back-to-back test measures the maximum number of frames that can be sent at a given rate without any frame loss. Each frame size was tested with a 60-second burst over 3 iterations.

Results at 95% Rate

Frame Size (bytes)	Tx Burst (Frames)	Tx Burst (Bytes)	Max Offered Rate (fps)	Max Offered Rate (Mbps)	Result
64	33,928,560	2,171,427,840	563,750	378.84	Pass
128	19,256,748	2,464,863,744	320,946	380.00	Pass
256	10,326,084	2,643,477,504	171,588	378.87	Pass
512	5,357,136	2,742,853,632	89,019	378.86	Pass
1024	2,729,880	2,795,397,120	45,363	378.87	Pass
1280	2,192,304	2,806,149,120	36,538	380.00	Pass
1518	1,853,052	2,812,932,936	30,795	378.90	Pass

Per-Port Back-to-Back at 95% Rate

Each port sustained the full 60-second burst with zero loss. Burst frames were distributed equally across all 3 destination ports per source port.

Port P-0-0-0

Frame Size (bytes)	Tx Burst (Frames)	Tx Burst (Bytes)
64	8,482,140	542,856,960
128	4,814,187	616,215,936
256	2,581,521	660,869,376
512	1,339,284	685,713,408
1024	682,470	698,849,280
1280	548,076	701,537,280
1518	463,263	703,233,234

Ports P-0-0-1 through P-0-0-3 — identical results

All remaining 3 ports produced the same burst frame counts and zero loss as P-0-0-0 above.

Results at 100% Rate

Frame Size (bytes)	Tx Burst (Frames)	Tx Burst (Bytes)	Max Offered Rate (fps)	Max Offered Rate (Mbps)	Result
64	35,714,280	2,285,713,920	595,238	400.00	Pass
128	20,270,268	2,594,594,304	337,838	400.00	Pass
256	10,869,564	2,782,608,384	181,159	400.00	Pass
512	5,639,088	2,887,213,056	93,985	400.00	Pass
1024	2,873,556	2,942,521,344	47,893	400.00	Pass
1280	2,307,684	2,953,835,520	38,461	400.00	Pass
1518	1,950,576	2,960,974,368	32,510	400.00	Pass

Per-Port Back-to-Back at 100% Rate

Each port sustained the full 60-second burst at line rate with zero loss.

Port P-0-0-0

Frame Size (bytes)	Tx Burst (Frames)	Tx Burst (Bytes)
64	8,928,570	571,428,480
128	5,067,567	648,648,576
256	2,717,391	695,652,096
512	1,409,772	721,803,264
1024	718,389	735,630,336
1280	576,921	738,458,880
1518	487,644	740,243,592

Ports P-0-0-1 through P-0-0-3 — identical results

All remaining 3 ports produced the same burst frame counts and zero loss as P-0-0-0 above.

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About This Test

RFC 2544 defines a standardised benchmarking methodology for network interconnect devices. The tests cover:

• Throughput — maximum rate at which no frames are lost
• Latency — forwarding delay at various frame sizes and rates
• Frame Loss Rate — percentage of frames lost under load
• Back-to-Back — maximum burst length the device can handle without loss

Testing was performed using the Xena2544 automated test suite. Each test was run for 3 iterations and results averaged to minimise measurement variance.