Switching Global

Tab. Switching:Global dialog

Parameters

Meaning

Possible values

Default setting

MAC address (read only)

Display the MAC address of the device

Aging Time (s)

Enter the Aging Time in seconds for dynamic MAC address entries.

In connection with the router redundancy, select a time ≥ 30 s.

10-630

30

Activate Flow Control

Activate/deactivate the flow control

On, Off

Off


Note: When you are using a redundancy function, you deactivate the flow control on the participating device ports. If the flow control and the redundancy function are active at the same time, there is a risk that the redundancy function will not operate as intended.

Tab. Switching:Global dialog

Parameters

Meaning

Possible values

Default setting

Address learning

Activate/deactivate the learning of MAC source addresses.

Note: If routing is active, the device prevents the address learning from being switched off.
When you activate routing, the device automatically activates the address learning.

On, Off

On

Frame size

Set the maximum packet size (frame size) in bytes.

1522, 1552

1522

Activate Address Relearn Detection

Enable/disable whether the device detects whether it has repeatedly learned the same MAC source addresses at different ports. This process very probably indicates a loop situation in the network.
If the device detects this process, it creates an entry in the log file and sends an alarm (trap).

On, Off

Off

Address Relearn Threshold

Number of learned MAC addresses on different ports within a checking interval. If the number of learned addresses reach this threshold, the device sees this as a relevant event. The interval for this check is a few seconds.

1 - 1024

1

Activate Duplex Mismatch Detection

Enable/disable whether the device reports a duplex problem at a port for specific error events. This means that the duplex mode of the port might not match that of the remote port. If the device detects a potential non-match, it creates an entry in the trap log and sends an alarm (trap).

To detect potential non-matches, the device evaluates the error counters of the port after the connection is set up, in the context of the port settings 'Evaluation of non-matching of the duplex mode'.

On, Off

On


The following table lists the duplex operating modes for TX ports, with the possible fault events. The meanings of terms used in the table are as follows:

Tab. Evaluation of non-matching of the duplex mode (Forts.)

No.

Automatic configuration

Current duplex mode

Detected error events (≥ 10 after link up)

Duplex modes

Possible causes

1

On

Half duplex

None

OK

2

On

Half duplex

Collisions

OK

 

3

On

Half duplex

Late collisions

Duplex problem detected

Duplex problem, EMI, network extension

4

On

Half duplex

CRC error

OK

EMI

5

On

Full duplex

None

OK

6

On

Full duplex

Collisions

OK

EMI

7

On

Full duplex

Late collisions

OK

EMI

8

On

Full duplex

CRC error

OK

EMI

9

Off

Half duplex

None

OK

10

Off

Half duplex

Collisions

OK

 

11

Off

Half duplex

Late collisions

Duplex problem detected

Duplex problem, EMI, network extension

12

Off

Half duplex

CRC error

OK

EMI

13

Off

Full duplex

None

OK

14

Off

Full duplex

Collisions

OK

EMI

15

Off

Full duplex

Late collisions

OK

EMI

16

Off

Full duplex

CRC error

Duplex problem detected

Duplex problem, EMI


Buttons

Tab. Buttons (Forts.)

Button

Meaning

“Set”

Transfers the changes to the volatile memory (RAM) of the device. To permanently save the changes, open the Basic Settings:Load/Save dialog, select the location to save the configuration, and click “Save”.

“Reload”

Updates the fields with the values that are saved in the volatile memory (RAM) of the device.

“Help”

Opens the online help.