Technical data

ServerIron ADX Administration Guide 67

53-1002434-01

Using Syslog

This example shows log entries for authentication failures. If someone enters an invalid community

string when attempting to access the SNMP server on the Brocade device, the device generates a

trap in the device's Syslog buffer. (If you have configured the device to use a third-party Syslog

server, the device also sends a log entry to the server.)

Syntax: show logging

Here is an example of a log that contains SNMP authentication traps. In this example, someone

attempted to access the Brocade device three times using invalid SNMP community strings. The

unsuccessful attempts indicate either an authorized user who is also a poor typist, or an

unauthorized user who is attempting to access the device.

This example shows a log entry for an IP address conflict between the Brocade device and another

device on the network.

In addition to placing an entry in the log, the software sends a log message to the Syslog server, if

you have configured one, and sends a message to each open CLI session.

Here are some examples of log entries for packets denied by Access Control Lists (ACLs).

NOTE

On devices that also use Layer 2 MAC filters, both types of log entries can appear in the same log.

Only ACL log entries are shown in this example.

ServerIronADX(config)# show log

Syslog logging: enabled (0 messages dropped, 0 flushes, 1 overruns)

Buffer logging: level ACDMEINW, 50 messages logged

level code: A=alert C=critical D=debugging M=emergency E=error

I=informational N=notification W=warning

Log Buffer (50 entries):

00d01h45m13s:info:SNMP Authentication failure, intruder IP: 207.95.6.55

00d00h01m00s:info:SNMP Authentication failure, intruder IP: 207.95.6.55

00d00h00m05s:info:SNMP Authentication failure, intruder IP: 207.95.6.55