Cisco DHCP configuration - Revision history

Pio2pio: /* Stateless DHCPv6 */

2015-02-03T14:26:51Z

Stateless DHCPv6

← Older revision		Revision as of 16:26, 3 February 2015
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	== Stateless DHCPv6 ==		== Stateless DHCPv6 ==
	IP addresses are configured via RA messages, the stateless DHCPv6 server is only providing configuration parameters for clients, not IPv6 addresses.		IP addresses are configured via RA messages, the stateless DHCPv6 server is only providing other configuration parameters for clients, not IPv6 addresses.

	Flags for Stateless DHCPv6 are set to: O(ther) = 1 and M(anaged) = 0 (default).		Flags for Stateless DHCPv6 are set to: O(ther) = 1 and M(anaged) = 0 (default).

Pio2pio: /* SLAAC */

2015-02-03T14:25:07Z

SLAAC

← Older revision		Revision as of 16:25, 3 February 2015
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	== SLAAC ==		== SLAAC ==
			SLAAC uses only the information that is provided by RA messages to configure IPv6 settings.
	*'''Router Solicitation (RS)''' message - sends by a client when configured to obtain IPv6 address via SLAAC. The RS message is sent to the IPv6 all-routers multicast address '''FF02::2'''.		*'''Router Solicitation (RS)''' message - sends by a client when configured to obtain IPv6 address via SLAAC. The RS message is sent to the IPv6 all-routers multicast address '''FF02::2'''.
	*'''Router Advertisement (RA)''' message - ICMPv6 RA is sent periodically or in response to RS message by routers to clients configured to obtain their IPv6 addresses automatically. It contains the prefix and prefix length of the local segment DNS server, MTU adn DGateway information only. The client creates its own Interface ID via EUI-64 process or randomly generated by OS. The client will use the router link-local address as its default gateway address. Cisco routers send RA messages every 200 seconds. RA messages are always sent to the IPv6 all-nodes multicast address '''FF02::1'''.		*'''Router Advertisement (RA)''' message - ICMPv6 RA is sent periodically or in response to RS message by routers to clients configured to obtain their IPv6 addresses automatically. It contains the prefix and prefix length of the local segment DNS server, MTU adn DGateway information only. The client creates its own Interface ID via EUI-64 process or randomly generated by OS. The client will use the router link-local address as its default gateway address. Cisco routers send RA messages every 200 seconds. RA messages are always sent to the IPv6 all-nodes multicast address '''FF02::1'''.

	Router interfaces by default are in SLAAC operation ~~by setting up~~ Managed Address Configuration flag (M flag) and the Other Configuration flag (O flag) to 0.		Router interfaces by default are in SLAAC operation where Managed Address Configuration flag (M flag) and the Other Configuration flag (O flag) set to 0.
	no ipv6 nd managed-config-flag !default flag ''M'' = 0		no ipv6 nd managed-config-flag !default flag ''M'' = 0
	no ipv6 nd other-config-flag !default flag ''O'' = 0		no ipv6 nd other-config-flag !default flag ''O'' = 0

Pio2pio: /* Configure DHCPv6 */

2015-02-03T12:13:05Z

Configure DHCPv6

← Older revision		Revision as of 14:13, 3 February 2015
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	or		or
	Router(config)# '''interface g0/0''' !below set of commands configure the interface as a <span style="color: orange">'''STATELESS'''</span> DHCPv6 client using SLAAC		Router(config)# '''interface g0/0''' !below set of commands configure the interface as a <span style="color: orange">'''STATELESS'''</span> DHCPv6 client using SLAAC
	Router(config-if)# '''ipv6 enable''' !~~used because~~ the router ~~does not yet have a global unicast~~ address		Router(config-if)# '''ipv6 enable''' !enables IPv6 on an interface and allows the router to configure its link-local address
	Router(config-if)# '''ipv6 address autoconfig''' !enables automatic configuration of IPv6 addressing using SLAAC.		Router(config-if)# '''ipv6 address autoconfig''' !enables automatic configuration of global unicast IPv6 addressing using SLAAC
	!An RA message is then used to inform the client router to use stateless DHCPv6.		!An RA message is then used to inform the client router to use stateless DHCPv6.
	or		or

Pio2pio: /* Configure DHCPv6 */

2015-02-03T12:06:00Z

Configure DHCPv6

← Older revision		Revision as of 14:06, 3 February 2015
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	Router(config)# '''ipv6 dhcp pool''' ''pool-name''		Router(config)# '''ipv6 dhcp pool''' ''pool-name''
	Router(config-dhcpv6)# '''address prefix''' ''ipv6-prefix'' '''lifetime''' ''infinite'' !Used in <span style="color: red">'''STATEFULL'''</span> configuration DHCPv6 server,		Router(config-dhcpv6)# '''address prefix''' ''ipv6-prefix'' '''lifetime''' ''infinite'' !Used in <span style="color: red">'''STATEFULL'''</span> configuration DHCPv6 server,
	!indicates the pool of addresses to be allocated by the server		!indicates the pool of addresses to be allocated by the server. It's not required for STATELESS DHCPv6 configuration.
	Router(config-dhcpv6)# '''dns-server 2001:db8:cafe:1::1/64'''		Router(config-dhcpv6)# '''dns-server 2001:db8:cafe:1::1/64'''
	Router(config-dhcpv6)# '''domain-name example.com'''		Router(config-dhcpv6)# '''domain-name example.com'''

Pio2pio: /* DHCPv6 Operations */

2015-02-03T11:58:28Z

DHCPv6 Operations

← Older revision		Revision as of 13:58, 3 February 2015
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	unicast		unicast

	<----------------------------------------<span style="color: Red">['''4''']</span> '''DHCPv6 REQUEST''' - stateful DHCPv6 client, requests IPv6 address and other parameters		<----------------------------------------<span style="color: Red">['''5''']</span> '''DHCPv6 REQUEST''' - stateful DHCPv6 client, requests IPv6 address and other parameters
	or '''INFORMATION-REQUEST''' - stateless DHCPv6 client, requests only parameters, InterfaceID is self generated		or '''INFORMATION-REQUEST''' - stateless DHCPv6 client, requests only parameters, InterfaceID is self generated
	unicast		unicast

Pio2pio: /* DHCPv6 troubleshooting */

2015-02-02T22:54:57Z

DHCPv6 troubleshooting

← Older revision		Revision as of 00:54, 3 February 2015
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	show ipv6 dhcp pool		show ipv6 dhcp pool
	show ipv6 interface gi0/0 !shows that the router has ''Stateless address autoconfig enabled''		show ipv6 interface gi0/0 !shows that the router has ''Stateless address autoconfig enabled''
	~~debug ipv6 dhcp detail~~
	show ipv6 dhcp binding		show ipv6 dhcp binding
	show ipv6 dhcp conflict		show ipv6 dhcp conflict
			debug ipv6 dhcp detail

	= References =		= References =

Pio2pio: /* Configure DHCPv6 */

2015-02-02T22:48:41Z

Configure DHCPv6

Pio2pio: /* DHCPv6 troubleshooting */

2015-02-02T22:36:19Z

DHCPv6 troubleshooting

← Older revision		Revision as of 00:36, 3 February 2015
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	debug ipv6 dhcp detail		debug ipv6 dhcp detail
	show ipv6 dhcp binding		show ipv6 dhcp binding
			show ipv6 dhcp conflict

	= References =		= References =

Pio2pio: /* Configure DHCPv6 */

2015-02-02T22:03:02Z

Configure DHCPv6

← Older revision		Revision as of 00:03, 3 February 2015
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	Router(config-if)# '''ipv6 dhcp server''' ''pool-name''		Router(config-if)# '''ipv6 dhcp server''' ''pool-name''
	Router(config-if)# '''ipv6 nd managed-config-flag''' !sets M flag =1, obtain IPv6 address and all parameters from STATEFUL DHCPv6 server		Router(config-if)# '''ipv6 nd managed-config-flag''' !sets M flag =1, obtain IPv6 address and all parameters from STATEFUL DHCPv6 server

			== Configuring the DHCPv6 Relay Agent ==
			Although configuration is similar to DHCPv4 the mechanism behind differs significantly.
			Router(config)# '''interface g0/0'''
			Router(config-if)# '''ipv6 dhcp relay agent destination 2001:db8:beef:1::6'''
			Router(config)# '''do show ipv6 dhcp interface g0/0 \| begin relay'''


	== DHCPv6 troubleshooting ==		== DHCPv6 troubleshooting ==

Pio2pio: /* Configure DHCPv6 */

2015-02-02T19:47:32Z

Configure DHCPv6

← Older revision		Revision as of 21:47, 2 February 2015
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	Router(config)# '''ipv6 unicast-routing'''		Router(config)# '''ipv6 unicast-routing'''
	Router(config)# '''ipv6 dhcp pool''' ''pool-name''		Router(config)# '''ipv6 dhcp pool''' ''pool-name''
	Router(config-dhcpv6)# '''address prefix''' ''ipv6-prefix'' '''lifetime''' ''infinite'' !Used in STATEFULL configuration DHCPv6 server,		Router(config-dhcpv6)# '''address prefix''' ''ipv6-prefix'' '''lifetime''' ''infinite'' !Used in STATEFULL configuration DHCPv6 server,
	!indicates the pool of addresses to be allocated by the server		!indicates the pool of addresses to be allocated by the server
	Router(config-dhcpv6)# '''dns-server 2001:db8:cafe:1::1/64'''		Router(config-dhcpv6)# '''dns-server 2001:db8:cafe:1::1/64'''
	Router(config-dhcpv6)# '''domain-name example.com'''		Router(config-dhcpv6)# '''domain-name example.com'''

← Older revision		Revision as of 00:48, 3 February 2015
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	= Configure DHCPv6 =		= Configure DHCPv6 =
			Server configuration
	Router(config)# '''ipv6 unicast-routing'''		Router(config)# '''ipv6 unicast-routing'''
	Router(config)# '''ipv6 dhcp pool''' ''pool-name''		Router(config)# '''ipv6 dhcp pool''' ''pool-name''
	Router(config-dhcpv6)# '''address prefix''' ''ipv6-prefix'' '''lifetime''' ''infinite'' !Used in STATEFULL configuration DHCPv6 server,		Router(config-dhcpv6)# '''address prefix''' ''ipv6-prefix'' '''lifetime''' ''infinite'' !Used in <span style="color: red">'''STATEFULL'''</span> configuration DHCPv6 server,
	!indicates the pool of addresses to be allocated by the server		!indicates the pool of addresses to be allocated by the server
	Router(config-dhcpv6)# '''dns-server 2001:db8:cafe:1::1/64'''		Router(config-dhcpv6)# '''dns-server 2001:db8:cafe:1::1/64'''
	Router(config-dhcpv6)# '''domain-name example.com'''		Router(config-dhcpv6)# '''domain-name example.com'''
	Router(config-dhcpv6)# '''exit'''		Router(config-dhcpv6)# '''exit'''
	Router(config)# '''interface g0/0''' !below set of commands configure the interface as a STATELESS DHCPv6 client		Interface configuration
			Router(config)# '''interface g0/0''' !below set of commands configure the interface as a <span style="color: orange">'''STATELESS'''</span> DHCPv6 client
	Router(config-if)# '''ipv6 address 2001:db8:cafe:1::1/64'''		Router(config-if)# '''ipv6 address 2001:db8:cafe:1::1/64'''
	Router(config-if)# '''ipv6 dhcp server''' ''pool-name''		Router(config-if)# '''ipv6 dhcp server''' ''pool-name''
	Router(config-if)# '''ipv6 nd other-config-flag''' !sets O flag =1, obtain only other then IPv6 parameters from DHCPv6 server		Router(config-if)# <span style="color: orange">'''ipv6 nd other-config-flag'''</span> !sets O flag =1, obtain only other then IPv6 parameters from DHCPv6 server
	or		or
	Router(config)# '''interface g0/0''' !below set of commands configure the interface as a STATELESS DHCPv6 client using SLAAC		Router(config)# '''interface g0/0''' !below set of commands configure the interface as a <span style="color: orange">'''STATELESS'''</span> DHCPv6 client using SLAAC
	Router(config-if)# '''ipv6 enable''' !used because the router does not yet have a global unicast address		Router(config-if)# '''ipv6 enable''' !used because the router does not yet have a global unicast address
	Router(config-if)# '''ipv6 address autoconfig''' !enables automatic configuration of IPv6 addressing using SLAAC.		Router(config-if)# '''ipv6 address autoconfig''' !enables automatic configuration of IPv6 addressing using SLAAC.
	!An RA message is then used to inform the client router to use stateless DHCPv6.		!An RA message is then used to inform the client router to use stateless DHCPv6.
	or		or
	Router(config)# '''interface g0/0''' !below set of commands configure the interface as a ~~STATEFUL~~ DHCPv6 client		Router(config)# '''interface g0/0''' !below set of commands configure the interface as a <span style="color: red">'''STATEFULL'''</span> DHCPv6 client
	Router(config-if)# '''ipv6 dhcp server''' ''pool-name''		Router(config-if)# '''ipv6 dhcp server''' ''pool-name''
	Router(config-if)# '''ipv6 nd managed-config-flag''' !sets M flag =1, obtain IPv6 address and all parameters from ~~STATEFUL~~ DHCPv6 server		Router(config-if)# <span style="color: red">'''ipv6 nd managed-config-flag'''</span> !sets M flag =1, obtain IPv6 address and all parameters from <span style="color: red">'''STATEFULL'''</span> DHCPv6 server

	== Configuring the DHCPv6 Relay Agent ==		== Configuring the DHCPv6 Relay Agent ==