Operating instructions

Chapter 8. Cisco Systems IGESM troubleshooting 215
8.6.2 Administrative
term monitor (term no monitor)
Redirects console output to current terminal emulation session.
If Telneted in, will not see important console messages unless this command is run first (must
run every time you Telnet in if you want to see con messages).
clear counters
Clears interface counters, more easily monitor counters from a given point in time.
clear log
Clears out old log messages so you can start fresh.
clear arp
Clears arp cache; useful when troubleshooting connectivity to IGESM management IP
address and external devices.
clear mac add
Clears MAC address tables, forces switch to relearn all necessary MACs.
no logging console (logging console) - from conf t mode
Useful when connected on console port and messages are interfering with operation
(scrolling too fast, interfering with entering commands).
Be sure to reset to logging console when done, as console messages under normal
operation are usually desired.
8.6.3 Troubleshooting
ping
Used to test basic network connectivity. Two modes:
򐂰
Simple (non-interactive): Enter the ping command and an IP address to ping:
Enter the ping command followed by an address and then the Enter key
switch#Ping 172.26.146.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.26.146.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/5/12 ms
򐂰 Advanced (interactive): Enter the ping command with no options. You will be prompted for
options to run the ping with. This is a very flexible way to control the its characteristics.
Enter the ping command followed by the Enter key to enter variables:
switch#ping
Protocol [ip]:
Target IP address: 172.26.146.1
Repeat count [5]: 10
Datagram size [100]: 1000
Timeout in seconds [2]: 1
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.