CCNP TSHOOT 6.0 - The Cisco Learning Network
CCNP TSHOOT 6.0 - The Cisco Learning Network
CCNP TSHOOT 6.0 - The Cisco Learning Network
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>CCNP</strong>v6 <strong>TSHOOT</strong><br />
<strong>The</strong> above output displays an address conflict resulting from the attempted assignment of the 10.1.80.1 address.<br />
<strong>The</strong> server sends a ping for an address before it attempts to assign that address from the pool. Also, after the<br />
client is assigned an IP address by the DHCP server, it sends a Gratuitous ARP or test ARP for that address. If<br />
the address is already assigned to a device interface, the device to which it is assigned responds, and the DHCP<br />
server marks it as a conflicted address. Conflicted addresses can be cleared with the clear ip dhcp<br />
conflict * command.<br />
DLS2#show ip dhcp binding<br />
Bindings from all pools not associated with VRF:<br />
IP address Client-ID/ Lease expiration Type<br />
Hardware address/<br />
User name<br />
10.1.80.2 0100.0bdb.04a5.cd Nov 21 2009 02:50 PM Automatic<br />
<strong>The</strong> above output displays the IP address, hardware (MAC) address, and lease expiration for a DHCP address<br />
assignment.<br />
DLS2#debug ip dhcp server events<br />
DHCP server event debugging is on.<br />
DLS2#<br />
Nov 20 15:20:31.653: DHCPD: Sending notification of TERMINATION:<br />
Nov 20 15:20:31.653: DHCPD: address 10.1.80.2 mask 255.255.255.0<br />
Nov 20 15:20:31.653: DHCPD: reason flags: RELEASE<br />
Nov 20 15:20:31.653: DHCPD: htype 1 chaddr 000b.db04.a5cd<br />
Nov 20 15:20:31.653: DHCPD: lease time remaining (secs) = 86356<br />
Nov 20 15:20:31.653: DHCPD: interface = FastEthernet0/5<br />
Nov 20 15:20:31.653: DHCPD: returned 10.1.80.2 to address pool BRO3.<br />
DLS2#<br />
Nov 20 15:20:46.226: DHCPD: Sending notification of DISCOVER:<br />
Nov 20 15:20:46.226: DHCPD: htype 1 chaddr 000b.db04.a5cd<br />
Nov 20 15:20:46.226: DHCPD: giaddr = 10.1.80.1<br />
Nov 20 15:20:46.226: DHCPD: interface = FastEthernet0/5<br />
Nov 20 15:20:46.226: DHCPD: class id 4d53465420352e30<br />
Nov 20 15:20:46.226: DHCPD: Sending notification of DISCOVER:<br />
Nov 20 15:20:46.226: DHCPD: htype 1 chaddr 000b.db04.a5cd<br />
Nov 20 15:20:46.226: DHCPD: giaddr = 10.1.80.1<br />
Nov 20 15:20:46.226: DHCPD: interface = FastEthernet0/5<br />
Nov 20 15:20:46.226: DHCPD: class id 4d53465420352e30<br />
Nov 20 15:20:48.239: DHCPD: client requests 10.1.80.2.<br />
Nov 20 15:20:48.239: DHCPD: Adding binding to radix tree (10.1.80.2)<br />
Nov 20 15:20:48.239: DHCPD: Adding binding to hash tree<br />
Nov 20 15:20:48.239: DHCPD: assigned IP address 10.1.80.2 to client<br />
0100.0bdb.04a5.cd. (471 0)<br />
Nov 20 15:20:48.239: DHCPD: Sending notification of ASSIGNMENT:<br />
Nov 20 15:20:48.239: DHCPD: address 10.1.80.2 mask 255.255.255.0<br />
Nov 20 15:20:48.239: DHCPD: htype 1 chaddr 000b.db04.a5cd<br />
Nov 20 15:20:48.239: DHCPD: lease time remaining (secs) = 86400<br />
Nov 20 15:20:48.239: DHCPD: interface = FastEthernet0/5<br />
Nov 20 15:21:49.307: DHCPD: checking for expired leases.<br />
<strong>The</strong> above output shows the process that the DHCP server goes through when a client issues the ipconfig<br />
/release and ipconfig /renew commands.<br />
R3#debug ip udp<br />
UDP packet debugging is on<br />
R3#conf t<br />
Enter configuration commands, one per line. End with CNTL/Z.<br />
All contents are Copyright © 1992–2010 <strong>Cisco</strong> Systems, Inc. All rights reserved. This document is <strong>Cisco</strong> Public Information. Page 17 of 20
Change language