Quote by Wendell Odom

““Testing using a ping of another device on the LAN can quickly confirm whether the LAN can pass packets and frames. Specifically, a working ping rules out many possible root causes of a problem. For instance, Figure 23-7 shows the ICMP messages that occur if R1 issues the command ping 172.16.1.51, pinging host A, which sits on the same VLAN as R1.””

Wendell Odom

★ ★ ★ ★ ★ 2.7 out of 5 (7 ratings)

More by Wendell Odom

“Host B can send ICMP echo reply messages to R1’s 172.16.4.1 IP address (hosts send echo reply messages to the IP address from which…

Wendell Odom

Image

“NTP Using a Loopback Interface for Better Availability An NTP server will accept NTP messages arriving to any of its IPv4 addresses by default.…

Wendell Odom

Image

“Storing Log Messages for Later Review With logging to the console and to terminals, an event happens, IOS sends the messages to the console…

Wendell Odom

Image

“Sending Messages in Real Time to Current Users Cisco IOS running on a device at least tries to allow current users to see log…

Wendell Odom

Image

“System Message Logging (Syslog) It is amazing just how helpful Cisco devices try to be to their administrators. When major (and even not-so-major) events…

Wendell Odom

Image

“172.16.1.51 and vice versa. You can reasonably assume that the switches learned the MAC addresses of the router and the host, adding those to…

Wendell Odom

Image

“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.…

Wendell Odom

Image

“sending of log messages to all logged users. However, that default configuration is not enough to allow the user to see the log messages.…

Wendell Odom

Image

“First, note that the example configures the same message level at the console and for terminal monitoring (level 7, or debug), and the same…

Wendell Odom

Image

“First, to understand why the standard and extended ping results have different effects, consider first the standard ping 172.16.1.51 command on R1, as shown…

Wendell Odom