Method of heuristic determination of network interface transmission mode and apparatus implementing such method
View Patent ↗A method for measuring and determining the duplex modes of a network interface. The method assumes the network interface to be operating in a half-duplex mode until the bandwidth utilization reaches a threshold. When the threshold is reached, the method checks the traffic collision in the interface. If there is no collision, then the duplex mode is determined to be full-duplex. If there is collision, then the duplex mode is determined to be half-duplex and an alarm is set off. In another embodiment, the interface type is determined through SNMP. If the interface is a WAN interface, then the interface is determined to be full-duplex.
1. An interface operational mode detection method, comprising:
obtaining traffic data for an interface at a network manager of a network system;
calculating a first bandwidth utilization value for the interface based on the obtained traffic data and a half-duplex operating mode, wherein the first bandwidth utilization is:
Utilization
=
(
Δ
ifInOctets
+
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
,
wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface;
if the calculated first bandwidth utilization value is greater than one hundred percent (100%), determining the interface is a full-duplex interface;
else, if the calculated first bandwidth utilization value is greater than a first threshold and if a collision count is less than a second value, determining the interface is a full-duplex interface;
else determining the interface is a half-duplex interface; and
managing the interface with the network manager based on the determination.
2. The method of claim 1 , wherein the act of obtaining traffic data comprises using a Simple Network Management Protocol (SNMP) to query the interface for the traffic data.
3. The method of claim 2 , further comprising:
using SNMP to determine whether the interface is a LAN interface or a WAN interface; and
determining the interface to be full-duplex mode if the interface is a WAN interface.
4. The method of claim 2 , wherein the collision count is obtained using an SNMP query.
5. The method of claim 1 , further comprising:
if the collision count exceeds the second value, setting off an alarm.
6. The method of claim 5 , wherein the second value is 1 or 100.
7. The method of claim 1 , wherein the first threshold is about 20-60%.
8. The method of claim 1 , comprising:
accepting an instruction from the network manager to determine the interface to be full-duplex mode or half-duplex mode and override a prior determination.
9. A program storage device, readable by a programmable control device, comprising instructions stored on the program storage device for causing the programmable control device to perform an interface operational mode detection method, comprising:
obtaining traffic data for an interface;
calculating a first bandwidth utilization value for the interface based on the obtained traffic data and a half-duplex operating mode,
wherein the first bandwidth utilization is:
Utilization
=
(
Δ
ifInOctets
+
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
,
and
wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface;
if the calculated first bandwidth utilization value is greater than one hundred percent (100%), determining the interface is a full-duplex interface;
else, if the calculated first bandwidth utilization value is greater than a first threshold and if a collision count is less than a second value, determining the interface is a full-duplex interface;
else determining the interface is a half-duplex interface.
10. The program storage device as in claim 9 , wherein the act of obtaining traffic data comprises using a Simple Network Management Protocol (SNMP) to query the interface for the traffic data.
11. The program storage device as in claim 10 , wherein the method further comprises:
using SNMP to determine whether the interface is a LAN interface or a WAN interface; and
determining the interface to be full-duplex mode if the interface is a WAN interface.
12. A network computer system in a digital network having a network interface agent reporting to a network manager, the network manager operative to:
obtain traffic data from the interface;
calculate a first bandwidth utilization value for the interface based on the obtained traffic data and a half-duplex operating mode,
wherein the first bandwidth utilization is:
Utilization
=
(
Δ
ifInOctets
+
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
,
and
wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface;
if the calculated first bandwidth utilization value is greater than one hundred percent (100%), determine the interface is a full-duplex interface;
else, if the calculated first bandwidth utilization value is greater than a first threshold and if a collision count is less than a second value, determine the interface is a full-duplex interface;
else determine the interface is a half-duplex interface.
13. The network computer system of claim 12 , wherein obtain traffic data comprises using a Simple Network Management Protocol (SNMP) to query the interface for the traffic data.
14. The network computer system of claim 13 , wherein the network manager is further operative to:
use SNMP to determine whether the interface is a LAN interface or a WAN interface; and
determine the interface to be full-duplex mode if the interface is a WAN interface.
15. The network computer system of claim 13 , wherein the collision count is obtained using an SNMP query.
16. The network computer system of claim 12 , wherein the network manager is further operative to set off an alarm if the collision count exceeds the second value.
17. The program storage device of claim 10 , wherein the collision count is obtained using an SNMP query.
18. The program storage device of claim 9 , further comprising setting off an alarm if the collision count exceeds the second value.
19. The program storage device of claim 18 , wherein the second value is 1 or 100.
20. The program storage device of claim 9 , wherein the first threshold is about 20-60%.
21. The program storage device of claim 9 , comprising accepting an instruction from the network manager to determine the interface to be full-duplex mode or half-duplex mode and override a prior determination.
22. The network computer system of claim 16 , wherein the second value is 1 or 100.
23. The network computer system of claim 12 , wherein the first threshold is about 20-60%.
24. An interface operational mode detection method, comprising:
obtaining traffic data for an interface at a network manager of a network system;
calculating a first bandwidth utilization value for the interface based on the obtained traffic data and a half-duplex operating mode, wherein the first bandwidth utilization is based on transmissions the interface has received and transmitted during a time period;
if the calculated first bandwidth utilization value is greater than one hundred percent (100%),
determining the interface is a full-duplex interface;
calculating a full-duplex mode bandwidth utilization for the interface, the full-duplex mode bandwidth utilization being:
FullDuplexBandwidthUtilization
=
Max
(
Δ
ifInOctets
,
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
,
wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface;
replacing the first threshold with a third threshold, the third threshold being greater than or equal to the first threshold; and
setting off an alarm if the full-duplex mode bandwidth utilization exceeds the third threshold;
else, if the calculated first bandwidth utilization value is greater than a first threshold and if a collision count is less than a second value, determining the interface is a full-duplex interface;
else determining the interface is a half-duplex interface; and
managing the interface with the network manager based on the determination.
25. The method of claim 24 ,
wherein the first bandwidth utilization is:
Utilization
=
(
Δ
ifInOctets
+
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
;
wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface.
26. The method of claim 24 , wherein the act of obtaining traffic data comprises using a Simple Network Management Protocol (SNMP) to query the interface for the traffic data.
27. The method of claim 26 , further comprising:
using SNMP to determine whether the interface is a LAN interface or a WAN interface; and
determining the interface to be full-duplex mode if the interface is a WAN interface.
28. The method of claim 26 , wherein the collision count is obtained using an SNMP query.
29. The method of claim 24 , further comprising setting off an alarm if the collision count exceeds the second value.
30. The method of claim 29 , wherein the second value is 1 or 100.
31. The method of claim 24 , wherein the first threshold is about 20-60%, and wherein the third threshold is about 30%-90%.
32. The method of claim 24 , comprising accepting an instruction from the network manager to determine the interface to be full-duplex mode or half-duplex mode and override a prior determination.
33. A program storage device, readable by a programmable control device, comprising instructions stored on the program storage device for causing the programmable control device to perform an interface operational mode detection method, comprising:
obtaining traffic data for an interface;
calculating a first bandwidth utilization value for the interface based on the obtained traffic data and a half-duplex operating mode, wherein the first bandwidth utilization is based on transmissions the interface has received and transmitted during a time period;
if the calculated first bandwidth utilization value is greater than one hundred percent (100%),
determining the interface is a full-duplex interface;
calculating a full-duplex mode bandwidth utilization for the interface, the full-duplex mode bandwidth utilization being:
FullDuplexBandwidthUtilization
=
Max
(
Δ
ifInOctets
,
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
,
wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface;
replacing the first threshold with a third threshold, the third threshold being greater than or equal to the first threshold; and
setting off an alarm if the full-duplex mode bandwidth utilization exceeds the third threshold;
else, if the calculated first bandwidth utilization value is greater than a first threshold and if a collision count is less than a second value, determining the interface is a full-duplex interface;
else determining the interface is a half-duplex interface.
34. The program storage device as in claim 33 ,
wherein the first bandwidth utilization is:
Utilization
=
(
Δ
ifInOctets
+
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
;
wherein Δt is a time period; ΔifInOctets is the number of Octets the interface received during Δt; ΔifOutOctets is the number of Octets the interface transmitted during Δt; and ifSpeed is the transmission speed of the interface.
35. The program storage device as in claim 33 , where the act of obtaining traffic data comprises using a Simple Network Management Protocol (SNMP) to query the interface for the traffic data.
36. The program storage device as in claim 35 , wherein the method further comprises:
using SNMP to determine whether the interface is a LAN interface or a WAN interface; and
determining the interface to be full-duplex mode if the interface is a WAN interface.
37. The program storage device of claim 35 , wherein the collision count is obtained using an SNMP query.
38. The program storage device of claim 33 , further comprising setting off an alarm if the collision count exceeds the second value.
39. The program storage device of claim 38 , wherein the second value is 1 or 100.
40. The program storage device of claim 33 , wherein the first threshold is about 20-60%, and wherein the third threshold is about 30%-90%.
41. The program storage device of claim 33 , comprising accepting an instruction from the network manager to determine the interface to be full-duplex mode or half-duplex mode and override a prior determination.
42. A network computer system in a digital network having a network interface agent reporting to a network manager, the network manager operative to:
obtain traffic data from the interface;
calculate a first bandwidth utilization value for the interface based on the obtained traffic data and a half-duplex operating mode, wherein the first bandwidth utilization is based on transmissions the interface has received and transmitted during a time period;
if the calculated first bandwidth utilization value is greater than one hundred percent (100%),
determine the interface is a full-duplex interface,
calculate a full-duplex mode bandwidth utilization for the interface, the full-duplex mode bandwidth utilization being:
FullDuplexBandwidthUtilization
=
Max
(
Δ
ifInOctets
,
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
,
wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface
replace the first threshold with a third threshold, the third threshold being greater than or equal to the first threshold; and
set off an alarm if the full-duplex mode bandwidth utilization exceeds the third threshold;
else, if the calculated first bandwidth utilization value is greater than a first threshold and if a collision count is less than a second value, determine the interface is a full-duplex interface;
else determine the interface is a half-duplex interface.
43. The network system of claim 42 ,
wherein the first bandwidth utilization is:
Utilization
=
(
Δ
ifInOctets
+
Δ
ifOutOctets
)
×
8
×
100
(
Δ
t
)
×
ifSpeed
;
wherein Δt is a time period; ΔifInOctets is the number of Octets the interface received during Δt; ΔifOutOctets is the number of Octets the interface transmitted during Δt; and ifSpeed is the transmission speed of the interface.
44. The network computer system of claim 42 , wherein obtain traffic data comprises using the Simple Network Management Protocol (SNMP) to query the interface for the traffic data.
45. The network computer system of claim 44 , wherein the network manager is further operative to:
use SNMP to determine whether the interface is a LAN interface or a WAN interface; and
determine the interface to be full-duplex mode if the interface is a WAN interface.
46. The network computer system of claim 44 , wherein the collision count is obtained using an SNMP query.
47. The network computer system of claim 42 , wherein the network manager is further operative to set off an alarm if the collision count exceeds the second value.
48. The network computer system of claim 47 , wherein the second value is 1 or 100.
49. The network computer system of claim 42 , wherein the first threshold is about 20-60%, and wherein the third threshold is about 30%-90%.