3Com MSR 50, MSR 30 manual Checking for an expired lease, DHCP-DISCOVER packet received, 755

755

Table 140 Description on the fields of the debugging dhcp server error command

Field	Description
Unable to generate Message-Type	Failed to generate a packet without a parsed packet
without an analyzed packet!
Too many options have been	Failed to generate a packet with too many options
configured!	configured
Failed to cancel ICMP timer!	Failed to cancel the timer for sending ICMP packets
Failed to add ICMP timer!	Failed to add the timer for sending ICMP packets
Can not offer new IP without analyzed	Failed to offer IP lease without the parsed packet
packet!

Fault occurs in DHCP Sever time interval!

The interval at which the DHCP server waits for client’s response expires.

Examples # Configure DHCP server on the device, and enable all types of debugging for DHCP server. The DHCP client applies for IP address from the DHCP sever via a DHCP relay agent.

<Sysname> terminal debugging <Sysname> debugging dhcp server all

*0.263828 Sysname DHCPS/7/DHCPS_DEBUG_COMMON: Checking for expired lease.

// Checking for an expired lease

*0.278312 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer: Receive DHCPDISCOVER from 00e0.fc14.1601-Vlan-interface2

via 22.0.0.1.

*0.278312 Sysname DHCPS/7/DHCPS_DEBUG_PACKET: Rx, interface Vlan-interface1

Message type: request

Hardware type: 1, Hardware address length: 6

Hops: 1, Transaction ID: 4281385283

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 Discover

// A DHCP-DISCOVER packet received

*0.278312 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer: Sending ICMP ECHOREQUEST to target IP: 22.0.0.1.

*0.278312 Sysname DHCPS/7/DHCPS_DEBUG_COMMON: DHCPServer: Assign Free Lease from global pool.

//Checking whether the IP address 22.0.0.1 is in use using ICMP before assigning it from the global address pool to the client.

*0.278406 Sysname DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer: ICMP ECHOREPLY received from Client IP 22.0.0.1.

*0.278406 Sysname DHCPS/7/DHCPS_DEBUG_COMMON: DHCPServer: Create timeout timer for ICMP.