Unit 2 DHCP Troubleshooting
Unit 2: DHCP Troubleshooting
Dear Junior Admin,
Based on whof at you have told me regarding the DHCP scope of the overall corporate IP address, it sounds like you have a lease time settings which is probably set to renew IP addresses at the default times. Here is your options on what you can do with DHCP:
Table 4.5 Default DHCP Options
Code
Option name
Meaning
1
Subnet mask
Specifies the subnet mask of the client subnet. This option is defined in the DHCP Manager Create Scope or Scope Properties dialog box. It cannot be set directly in the DHCP Options dialog box.
3
Router
Specifies a list of IP addresses for routers on the client's subnet. Multihomed computers can have only one list per computer, not one per network adapter.
6
DNS servers
Specifies a list of IP addresses for DNS name servers available to the client.
15
Domain name
Specifies the DNS domain name that the client should use for DNS computer name resolution.
44
WINS/NBNS servers
Specifies a list of IP addresses for NetBIOS name servers (NBNS).
46
WINS/NBT node type
Allows configurable NetBIOS over TCP/IP (NetBT) clients to be configured as described in RFC 1001/1002, where 1 = b-node, 2 = p-node, 4 = m-node, and 8 = h-node. On multihomed computers, the node type is assigned to the entire computer, not to individual network adapters.
47
NetBIOS scope ID 1
Specifies a text string that is the NetBIOS over TCP/IP scope ID for the client, as specified in RFC 1001/1002.
51
Lease time
Specifies the time, in seconds, from address assignment until the client's lease on the address expires. Lease time is specified in the DHCP Manager Create Scope or Scope Properties dialog box, and can be set directly in the DHCP Options dialog box.
58
Renewal (T1) time value
Specifies the time in seconds from address assignment until the client enters the Renewing state. Renewal time is a function of the lease time option, which is specified in the DHCP Manager Create Scope or Scope Properties
Dear Junior Admin,
Based on whof at you have told me regarding the DHCP scope of the overall corporate IP address, it sounds like you have a lease time settings which is probably set to renew IP addresses at the default times. Here is your options on what you can do with DHCP:
Table 4.5 Default DHCP Options
Code
Option name
Meaning
1
Subnet mask
Specifies the subnet mask of the client subnet. This option is defined in the DHCP Manager Create Scope or Scope Properties dialog box. It cannot be set directly in the DHCP Options dialog box.
3
Router
Specifies a list of IP addresses for routers on the client's subnet. Multihomed computers can have only one list per computer, not one per network adapter.
6
DNS servers
Specifies a list of IP addresses for DNS name servers available to the client.
15
Domain name
Specifies the DNS domain name that the client should use for DNS computer name resolution.
44
WINS/NBNS servers
Specifies a list of IP addresses for NetBIOS name servers (NBNS).
46
WINS/NBT node type
Allows configurable NetBIOS over TCP/IP (NetBT) clients to be configured as described in RFC 1001/1002, where 1 = b-node, 2 = p-node, 4 = m-node, and 8 = h-node. On multihomed computers, the node type is assigned to the entire computer, not to individual network adapters.
47
NetBIOS scope ID 1
Specifies a text string that is the NetBIOS over TCP/IP scope ID for the client, as specified in RFC 1001/1002.
51
Lease time
Specifies the time, in seconds, from address assignment until the client's lease on the address expires. Lease time is specified in the DHCP Manager Create Scope or Scope Properties dialog box, and can be set directly in the DHCP Options dialog box.
58
Renewal (T1) time value
Specifies the time in seconds from address assignment until the client enters the Renewing state. Renewal time is a function of the lease time option, which is specified in the DHCP Manager Create Scope or Scope Properties