Editing "Global Parameters"

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The description of the fields appearing in the Global Parameters section are as follows:


Power Supply 1 Alarm / Power Supply 2 Alarm

The indicator contact is used to supervise the functions of the switch and thus facilitates remote diagnosis without management software. Contact interrupt indicates the failure of at least one of the two supply voltages by means of a potetial-free indicator contact.


Parameter

Value

Default Value

Power Supply 1 Alarm

Enable / Disable

Enable

Power Supply 2 Alarm

Enable / Disable

Enable


Aging Time

The aging time is the number of seconds a MAC-address will be kept in the forwarding database after having received a packet from this MAC address. The entries in the forwarding database are timed out periodically.


Parameter

Value

Default Value

Aging Time (s)

0 to 1048575

300


QoS Trust Mode

Received data packets are assigned to these classes by

- the priority of the data packet contained in the VLAN tag when the receiving ports were configured to trustDot1p.

- the QoS information (ToS/DiffServ) contained in the IP header when the receiving ports were configured to trustIpDscp.

- the port priority when the ports were configured to untrusted.

Note: Disable flow control if you use the functions in this menu.


Parameter

Value

Default Value

QoS Trust Mode

untrusted, trustDot1p, trustIpDscp

trustDot1p


QoS 802.1 D/p Mapping

This function helps prevent time-critical data traffic, such as language/video or real-time data, from being disrupted by less time-critical data traffic during periods of heavy traffic. By assigning high traffic classes for time-critical data and low traffic classes for less time-critical data optimal data flow for time-critical data traffic is provided. Clicking Configure the following dialog box will open:



The device supports 4 priority queues (IEEE 802.1D standard traffic classes).The Traffic class for VLAN Priority can have the following values:


VLAN Priority

Traffic Class

0

0 to 3

1

0 to 3

2

0 to 3

3

0 to 3

4

0 to 3

5

0 to 3

6

0 to 3

7

0 to 3


QoS IP DSCP Mapping

The Differentiated Services field in the IP header is used to mark the individual packets with a DSCP. Here the packets are divided into different quality classes. The first 3 bits of the DSCP are used to divide the packets into classes. The next 3 bits are used to further divide the classes on the basis of different criteria. This results in up to 64 different service classes. Clicking Configure the following dialog box will open:



The Traffic class for DSCP Value can have the following values


DSCP Value

Traffic Class

DSCP Value

Traffic Class

DSCP Value

Traffic Class

DSCP Value

Traffic Class

0

0 to 3

16

0 to 3

32

0 to 3

48

0 to 3

1

0 to 3

17

0 to 3

33

0 to 3

49

0 to 3

2

0 to 3

18

0 to 3

34

0 to 3

50

0 to 3

3

0 to 3

19

0 to 3

35

0 to 3

51

0 to 3

4

0 to 3

20

0 to 3

36

0 to 3

52

0 to 3

5

0 to 3

21

0 to 3

37

0 to 3

53

0 to 3

6

0 to 3

22

0 to 3

38

0 to 3

54

0 to 3

7

0 to 3

23

0 to 3

39

0 to 3

55

0 to 3

8

0 to 3

24

0 to 3

40

0 to 3

56

0 to 3

9

0 to 3

25

0 to 3

41

0 to 3

57

0 to 3

10

0 to 3

26

0 to 3

42

0 to 3

58

0 to 3

11

0 to 3

27

0 to 3

43

0 to 3

59

0 to 3

12

0 to 3

28

0 to 3

44

0 to 3

60

0 to 3

13

0 to 3

29

0 to 3

45

0 to 3

61

0 to 3

14

0 to 3

30

0 to 3

46

0 to 3

62

0 to 3

15

0 to 3

31

0 to 3

47

0 to 3

63

0 to 3