A Case Study of the Accuracy of SNMP Measurements

Table 1

Error sizes: “missing” refers to the total number of missing data points from either end of the link (out of 23,498 entries). M and SD are the mean and standard deviations of the relative error calculated as described in the text.

Source →  Destination	Missing	M	SD
Atlanta →  Houston	8	−4.9e−05	0.0054
Houston →  Atlanta	1	2.9e−05	0.0049
Atlanta →  Indianapolis	178	−1.5e−05	0.0065
Indianapolis →  Atlanta	173	−3.8e−05	0.0066
Atlanta →  Washington	5	−3e−05	0.0054
Washington →  Atlanta	1	−3.4e−05	0.0065
Chicago →  Indianapolis	3	−6e−05	0.0060
Indianapolis →  Chicago	3	2.8e−05	0.0056
Chicago →  New York	2	1.6e−05	0.0039
New York →  Chicago	7	−3.3e−05	0.0041
Denver →  Kansas City	5	−3.9e−05	0.0061
Kansas City →  Denver	5	1.8e−05	0.0034
Denver →  Sunnyvale	5	−7.9e−06	0.0041
Sunnyvale →  Denver	6	−6.1e−06	0.0054
Denver →  Seattle	5	6.3e−06	0.0048
Seattle →  Denver	5	−2.9e−05	0.0049
Houston →  Kansas City	5	−1.3e−05	0.0072
Kansas City →  Houston	5	−3.3e−05	0.0063
Houston →  Los Angeles	5	7.6e−05	0.0078
Los Angeles →  Houston	5	−3.9e−05	0.0053
Indianapolis →  Kansas City	4	4.3e−05	0.0048
Kansas City →  Indianapolis	5	−3.6e−05	0.0054
Los Angeles →  Sunnyvale	5	2.1e−05	0.0040
Sunnyvale →  Los Angeles	5	−3.7e−05	0.0043
New York →  Washington	6	−4.7e−05	0.0066
Washington →  New York	6	4.3e−06	0.0038
Sunnyvale →  Seattle	4	−1.1e−06	0.0066
Seattle →  Sunnyvale	4	3.1e−05	0.0054