Users Guide

658| IP Mobility Dell Networking W-Series ArubaOS 6.5.x| User Guide
Revocations
A home agent or foreign agent can send a registration revocation message, which revokes registration service
for the mobile client. For example, when a mobile client roams from one foreign agent to another, the home
agent can send a registration revocation message to the first foreign agent so that the foreign agent can free
any resources held for the client.
IPv6 L3 Mobility
ArubaOS supports IPv6 L3 Mobility functionality. The existing L3 mobility solution has been enhanced to
support dual stacked (IPv4 and IPv6) and pure IPv6 mobile clients. The IPv6 L3 mobility allows the wireless
clients to retain their IPv4 or IPv6 addresses across different VLANs within a controller and between different
controllers. In the previous release, the Dell Controllers supported L3 mobility only for single stacked IPv4
clients.
The following changes in the existing behavior is observed in the Dell controller when you enable IPv6 L3
Mobility support :
l The controller throttles and proxies Router Advertisements (RAs) if the router mobile command is enabled.
The following command configures the maximum time allowed between sending unsolicited multicast router
advertisements from each interface when RA proxy is enabled:
(config)# ipv6 proxy-ra interval <180-1800>
The default value for proxy-ra interval is 600 seconds. If RA is configured on an external router, but not within
the controller, the controller stores the RA in cache and replays the RA from the external server and replays
them every proxy-ra interval. If RA is configured in both an external router and in the controller, clients serviced
by the controller receive RA only from the controller and not from the external router.
l L3 mobility support for wired and third-party APs are deprecated.
l The HA discovery on association parameter is turned on by default and is not configurable.
By enabling L3 mobility feature, both the solicited RAs and the unsolicited periodic RAs will be converted to L2 unicast
and sent to the wireless clients.
It is recommended to reboot the controller when you issue the no router mobile command so that mutlicast RAs do
not continue to get converted to unicast RAs.
Multicast Mobility
Multicast mobility ensures a client gets an uninterrupted multicast stream while roaming. ArubaOS provides
support for a MLD proxy to enable IPv6 multicast mobility. To achieve multicast mobility, the Home Agent (HA)
and the Foreign Agent (FA) must be capable of MLD proxying by exchanging the MLD membership information
and process MLD messages. ArubaOS controller supports MLD versions v1 and v2.
Important Points to Remember
l ArubaOS does not support the source-based forwarding functionality of MLDv2.
l The multicast traffic flow stops for few seconds for roaming clients after enabling or disabling the Dynamic
Multicast Optimization (DMO) option.
In the CLI
Use the following command to enable MLD proxy in the VLAN:
(host)(config)# interface vlan <vlan-id>
(host)(config-subif)# ipv6 mld proxy <gigabitEthernet/fastEthernet> <slot>/<module>/<port>