Cisco Cisco 2504 Wireless Controller Referencia técnica
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Cisco Wireless LAN Controller IPv6 Deployment Guide, CUWN Release 8.0
D r a f t L a b e l — C i s c o C o n f i d e n t i a l
Phase 1—Client IPv6 Support in WLC Release 7.2 to 7.6
Cisco Aironet 1530 series outdoor 802.11n mesh access points, Cisco Aironet 1550 (1552) series outdoor 802.11n
mesh access points, Cisco Aironet 1520 (1522, 1524) series outdoor mesh access points
mesh access points, Cisco Aironet 1520 (1522, 1524) series outdoor mesh access points
Note: The 1520 and 1550 series APs with 64 MB does not support PPPoE and PMIPv6.
An IPv6-capable Router and/or Switch
Prerequisites for Wireless IPv6 Client Connectivity
To enable wireless IPv6 client connectivity, the underlying wired network must support IPv6 routing and an address
assignment mechanism such as SLAAC or DHCPv6. The wireless LAN controller must have L2 adjacency to the IPv6
router, and the VLAN must be tagged when entering the controller interfaces. Prior to Release 8.0, APs did not require
connectivity to an IPv6 network, as all traffic is encapsulated inside the IPv4 CAPWAP tunnel between the AP and the
controller.
assignment mechanism such as SLAAC or DHCPv6. The wireless LAN controller must have L2 adjacency to the IPv6
router, and the VLAN must be tagged when entering the controller interfaces. Prior to Release 8.0, APs did not require
connectivity to an IPv6 network, as all traffic is encapsulated inside the IPv4 CAPWAP tunnel between the AP and the
controller.
SLAAC Address Assignment
The most common method for IPv6 client address assignment is Stateless Address Auto Configuration (SLAAC). SLAAC
provides simple plug and play connectivity where clients self-assign an address based on the IPv6 prefix. This process
is achieved by the IPv6 router sending out periodic Router Advertisement messages which inform the client of the IPv6
prefix in use (the first 64 bits) and of the IPv6 default gateway. From that point, clients can generate the remaining 64
bits of their IPv6 address based on either the MAC address of the adapter or randomly. Duplicate address detection is
performed by IPv6 clients to ensure random addresses that are picked do not collide with other clients. The address of
the router sending advertisements is used as the default gateway for the client.
provides simple plug and play connectivity where clients self-assign an address based on the IPv6 prefix. This process
is achieved by the IPv6 router sending out periodic Router Advertisement messages which inform the client of the IPv6
prefix in use (the first 64 bits) and of the IPv6 default gateway. From that point, clients can generate the remaining 64
bits of their IPv6 address based on either the MAC address of the adapter or randomly. Duplicate address detection is
performed by IPv6 clients to ensure random addresses that are picked do not collide with other clients. The address of
the router sending advertisements is used as the default gateway for the client.
The following configuration example from a Cisco-capable IPv6 router has the necessary commands to enable SLAAC
addressing and router advertisements:
addressing and router advertisements:
interface Vlan20
description IPv6-SLAAC
ip address 192.168.20.1 255.255.255.0
ipv6 address 2001:DB8:0:20::1/64
ipv6 enable
end