3Com MSR 30 Checking whether the IP address 22.0.0.2 is in use, DHCP-REQUEST message received

756CHAPTER 56: DHCP DEBUGGING COMMANDS

//The DHCP server receives a response from a client at 22.0.0.1, which indicates the IP address is in use.

*0.278406 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer: Sending ICMP ECHOREQUEST to target IP: 22.0.0.2.

// Checking whether the IP address 22.0.0.2 is in use

*0.278406 Sysname DHCPS/7/DHCPS_DEBUG_COMMON: DHCPServer: Assign Free Lease from global pool.

*0.279016 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer: ICMP Timeout!

*0.279016 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer: ICMP detecting finished. The target IP can be used for d hcp allocation.

//No ICMP reply is received from 22.0.0.2 after the timer expires, which indicates the IP address can be used for allocation.

*0.279016 Sysname DHCPS/7/DHCPS_DEBUG_PACKET: Tx, interface Vlan-interface1

Message type: reply

Hardware type: 1, Hardware address length: 6

Hops: 0, Transaction ID: 4281385283

Seconds: 0, Broadcast flag: 0
Client	IP	address: 0.0.0.0	Your IP address: 22.0.0.2
Server	IP	address: 0.0.0.0	Relay agent IP address: 22.0.0.1

Client hardware address: 00e0-fc14-1601

Server host name: Not Configured, Boot file name: Not Configured

DHCP message type: DHCP Offer

//A DHCP-OFFER message containing the IP address 22.0.0.2 was sent to the DHCP client.

*0.279016 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DhcpServer: Send DHCPOFFER to 00e0.fc14.1601-Vlan-interface2 Offer I

P=> 22.0.0.2 via 22.0.0.1.

*0.279172 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer: Receive DHCPREQUEST from 00e0.fc14.1601-Vlan-interface2 via 22.0.0.1.

*0.279172 Sysname DHCPS/7/DHCPS_DEBUG_PACKET: Rx, interface Vlan-interface1

Message type: request

Hardware type: 1, Hardware address length: 6

Hops: 1, Transaction ID: 2294688324

Seconds: 0, Broadcast flag: 0
Client	IP	address: 0.0.0.0	Your IP address: 0.0.0.0
Server	IP	address: 0.0.0.0	Relay agent IP address: 22.0.0.1

Client hardware address: 00e0-fc14-1601

Server host name: Not Configured, Boot file name: Not Configured

DHCP message type: DHCP Request

// A DHCP-REQUEST message received

*0.279172 Sysname DHCPS/7/DHCPS_DEBUG_COMMON: DHCPServer: Acknowledge the DHCPREQUEST message!

*0.279172 Sysname DHCPS/7/DHCPS_DEBUG_PACKET: Tx, interface Vlan-interface1