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6-17

Configuring and Monitoring Port Security

Reading Intrusion Alerts and Resetting Alert Flags

The log shows the most recent intrusion at the top of the listing. You cannot

delete Intrusion Log entries (unless you reset the switch to its factory-default

configuration). Instead, if the log is filled when the switch detects a new

intrusion, the oldest entry is dropped off the listing and the newest entry

appears at the top of the listing.

Keeping the Intrusion Log Current by Resetting Alert

Flags

When a violation occurs on a port, an alert flag is set for that port and the

violation is entered in the Intrusion Log. The switch can detect and handle

subsequent intrusions on that port, but will not log another intrusion on the

port until you reset the alert flag for either all ports or for the individual port.

Note on

Send-Disable

Operation

On a given port, if the intrusion action is to send an SNMP trap and then disable

the port (send-disable), and the an intruder is detected on the port, then the

switch sends an SNMP trap, sets the port’s alert flag, and disables the port. If

you re-enable the port without resetting the port’s alert flag, then the port

operates as follows:



The port comes up and will block traffic from unauthorized devices

it detects.



If the port detects another intruder, it will send another SNMP trap,

but will not become disabled again unless you first reset the port’s

intrusion flag.

This operation enables the port to continue passing traffic for authorized

devices while you take the time to locate and eliminate the intruder. Other-

wise, the presence of an intruder could cause the switch to repeatedly disable

the port.

Menu: Checking for Intrusions, Listing Intrusion Alerts, and

Resetting Alert Flags

The menu interface indicates per-port intrusions in the Port Status screen, and

provides details and the reset function in the Intrusion Log screen.

1. From the Main Menu select:

1. Status and Counters

4. Port Status

!FishSecurity.book Page 17 Thursday, October 10, 2002 9:19 PM

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HP ProCurve Switch 2650 Specifications

General

Switching Capacity	13.6 Gbps
Forwarding Rate	10.1 Mpps
Layer	Layer 2
Form Factor	Rack-mountable
Flash Memory	8 MB
Jumbo Frame Support	Yes
Power Supply	Internal
Management	Web, CLI, SNMP
Features	VLAN support, IGMP snooping, QoS
Operating Temperature	0°C to 45°C (32°F to 113°F)
Operating Humidity	15% to 95% (non-condensing)
Ports	48 x 10/100
MAC Address Table Size	8, 000 entries