3com 4500 50-PORT User Manual

The number of instances can be created in the table depends on the hardware 
resource of the product.

Delete line 10 from the extended RMON alarm table.

<SW4500>system-view

System View: return to User View with Ctrl+Z.

[SW4500]undo rmon prialarm 10

[SW4500]

rmon statistics entry-number [ owner text-string ]

Ethernet port view

 Number of the entry to be added/deleted, ranging from 1 to 

65535.

 Creator of the entry. Length of the character string ranges 

from 1 to127.

Use the 

 command to add an entry to the statistic table. Use the 

 command to delete an entry from statistic table.

RMON statistic management concerns the statistics and monitoring of the usage 
and error on a port. Statistics includes collision, CRC (Cyclic Redundancy Check) 
and queue, undersized or oversized packet, timeout, fragment, broadcast, 
multicast, unicast, and bandwidth utility.

Add the statistics of Ethernet 1/0/1to entry 20 of the statistics table.

<SW4500>system-view

System View: return to User View with Ctrl+Z.

[SW4500]interface Ethernet1/0/1

[SW4500-ethernet1/0/1]rmon statistics 20

[SW4500-ethernet1/0/1]

To protect unused sockets against attacks by malicious users and improve security, 
the Switch 4500 Family provides the following functions:

■

UDP port 123 is opened only when the NTP feature is enabled.

■

UDP port 123 is closed as the NTP feature is disabled.

These functions are implemented as follows: