Ch10 DHCP - Practical Flashcards
Excluding IPv4 addresses in DHCPv4
ip dhcp excluded-address low_address [high_address]
Global Config Command
Command used to create DHCPv4 Address Pool
ip dhcp pool dhcp_pool_name
// puts prompt into (dhcp_config)# mode.
Defining Default Gateway in DHCPv4 Config Mode
default-router address1 [address2 … address8]
DHCP-Config Cmd
Define DHCPv4 Address Pool
network network_number [mask | /prefix_length]
DHCP Config Command
Two Required Tasks to Setup DHCPv4
- Define the address pool.
- Define the default router or gateway.
Four Optional Tasks to Setup DHCPv4
- Define DNS Server
- Define the Domain Name.
- Define the duration of the DHCP lease.
- Define the NetBIOS WINS server.
Command to stop DHCP Server Function
no service dhcp
Global Config Command
Command to re/enable DHCP Server Function
service dhcp
Global Config Command
Define DNS Server DHCPv4
dns-server dns_address [address2…address8]
Define the Domain Name DHCPv4
domain-name domain_name
DHCP-Config Command
Define the Duration of the DHCP Lease DHCPv4
lease { days [hours] [minutes] | infinite ]
Define the NetBIOS WINS Server DHCPv4
netbios-name-server address1 [address2….address8]
What is the default value of a DNS lease?
1 day.
4 Methods to Verify DHCPv4 Configuration
- show running-config | section dhcp
- show ip dhcp binding
- show ip dhcp server statistics
- ipconfig /all // client side
Command Used to Display DHCP Commands Only in Running-Config
show running-config | section dhcp
Command to display list of all IPv4 address to MAC address bindings that have been created by DHCPv4.
show ip dhcp binding
Command used to verify messages are being sent or received by the router.
show ip dhcp server statistics
Two Steps for Setting Router as DHCP Relay Agent
- interface interface_id
- ip helper-address dhcp_server_address
Three Steps to Configure Router as a DHCPv4 Client
- interface interface_id
- ip address dhcp
- no shutdown
Command used to display address conflicts in DHCP
show ip dhcp conflict
Command that can determine if DHCP messages are not reaching destination.
debug ip dhcp server events
Commands used to Re-Enable SLAAC on an interface.
- no ipv6 nd managed-config flag
- no ipv6 nd other-config flag
Command used to enable Stateless DHCPv6 by setting O flag to 1
ipv6 nd other-config-flag
Command used to enable Stateful DHCPv6 by setting M Flag to 1.
ipv6 nd managed-config-flag
Configure Router as Stateless DHCPv6 Server (7)
- ipv6 unicast-routing
- ipv6 dhcp pool pool_name
- dns-server dns_server_address
- domain-name domain_name
- interface interface_id
- ipv6 dhcp server pool_name
- ipv6 nd other-config-flag
Configuring Router as Stateless DHCPv6 Client (3)
- interface interface_id
- ipv6 enable // used when a global unicast address is not on the router.
- ipv6 address autoconfig // enables SLAAC
4 Methods to Verify Stateless DHCPv6
- show ipv6 dhcp pool
- show running-config
- show ipv6 interface interface_id
- debug ipv6 dhcp detail
Configure Router as Stateful DHCP Server. (8)
- ipv6 unicast-routing
- ipv6 dhcp pool pool_name
- address prefix ipv6_prefix [lifetime {valid_lifetime preferred_lifetime | infinite }]
- dns-server dns_name
- domain-name domain_name
- interface interface_id
- ipv6 dhcp server pool_name
- ipv6 nd managed-config-flag
Configure Router as Stateful DHCPv6 Client (3)
- interface interface_id
- ipv6 enable
- ipv6 address dhcp
3 Methods to Verify Stateful DHCPv6 Server
- show ipv6 dhcp pool
- show ipv6 dhcp binding
- show ipv6 interface interface_id
Configure Router as a DHCPv6 Relay Agent (2)
- interface interface_id
- ipv6 dhcp relay destination dhcpv6_server_address
Command Used to Verify Receipt and Transmission of DHCPv6 messages.
debug ipv6 dhcp detail
