CCNP TSHOOT 6.0 - Cisco Learning Home
CCNP TSHOOT 6.0 - Cisco Learning Home
CCNP TSHOOT 6.0 - Cisco Learning Home
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<strong>CCNP</strong>v6 <strong>TSHOOT</strong><br />
debug dhcp detail<br />
debug ip dhcp server events<br />
clear ip dhcp server statistics<br />
clear ip dhcp conflict *<br />
show ip sockets<br />
Sample Troubleshooting Output<br />
NAT-related Commands<br />
expiration for a DHCP address assignment.<br />
Displays real-time information on a <strong>Cisco</strong> IOS DHCP client<br />
(router or switch).<br />
Displays real-time information for DHCP server process<br />
messages.<br />
Clears DHCP server statistics.<br />
Clears conflicted addresses.<br />
The following commands and output are samples from the devices in this lab.<br />
Displays the current connections for this server, including<br />
which services are running.<br />
R1#show ip nat translations<br />
Pro Inside global Inside local Outside local Outside global<br />
icmp 198.133.219.7:512 10.1.10.1:512 192.168.2.1:512 192.168.2.1:512<br />
--- 198.133.219.7 10.1.10.1 --- ---<br />
--- 198.133.219.1 10.1.50.1 --- ---<br />
udp 198.133.219.6:123 10.1.100.1:123 192.168.2.1:123 192.168.2.1:123<br />
tcp 198.133.219.6:38711 10.1.100.1:38711 192.168.2.1:23 192.168.2.1:23<br />
--- 198.133.219.6 10.1.100.1 --- ---<br />
udp 198.133.219.4:123 10.1.100.252:123 192.168.2.1:123 192.168.2.1:123<br />
--- 198.133.219.4 10.1.100.252 --- ---<br />
tcp 198.133.219.3:1121 10.1.10.1:1121 192.168.2.1:80 192.168.2.1:80<br />
--- 198.133.219.3 10.1.10.1 --- ---<br />
udp 198.133.219.5:123 10.1.100.253:123 192.168.2.1:123 192.168.2.1:123<br />
--- 198.133.219.5 10.1.100.253 --- ---<br />
In the above example, the connections resulted from pings (ICMP port 512), NTP (UDP port 123), Telnet (TCP<br />
port 23), and HTTP (TCP port 80).<br />
R1#show ip nat statistics<br />
Total active translations: 7 (1 static, 6 dynamic; 2 extended)<br />
Peak translations: 9, occurred 00:45:03 ago<br />
Outside interfaces:<br />
Serial0/0/0<br />
Inside interfaces:<br />
FastEthernet0/1<br />
Hits: 2442 Misses: 0<br />
CEF Translated packets: 2439, CEF Punted packets: 11<br />
Expired translations: 15<br />
Dynamic mappings:<br />
-- Inside Source<br />
[Id: 8] access-list 1 pool public-addrs refcount 6<br />
pool public-addrs: netmask 255.255.255.248<br />
start 198.133.219.3 end 198.133.219.6<br />
type generic, total addresses 4, allocated 4 (100%), misses 8<br />
Appl doors: 0<br />
Normal doors: 0<br />
Queued Packets: 0<br />
All contents are Copyright © 1992–2010 <strong>Cisco</strong> Systems, Inc. All rights reserved. This document is <strong>Cisco</strong> Public Information. Page 14 of 20
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