Quotes About Syslog

First, note that the example configures the same message level at the console and for terminal monitoring (level 7, or debug), and the same level for both buffered and logging to the syslog server (level 4, or warning). The levels may be set using the numeric severity level or the name as shown earlier in Figure 33-3. The show logging command confirms those same configuration settings and also lists the log messages per the logging buffered configuration.

Analyzing Topology Using CDP and LLDP The first two major sections of this chapter showed two features—Syslog and NTP—that work the same way on both routers and switches. This final section shows yet another feature common to both routers and switches, with two similar protocols: the Cisco Discovery Protocol (CDP) and the Link Layer Discovery Protocol (LLDP). This section focuses on CDP, followed by LLDP.

Configuring and Verifying System Logging With the information in Table 33-2, configuring syslog in a Cisco IOS router or switch should be relatively straightforward. Example 33-2 shows a sample, based on Figure 33-4. The figure shows a syslog server at IP address 172.16.3.9. Both switches and both routers will use the same configuration shown in Example 33-2, although the example shows the configuration process on a single device, Router R1.