H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 101)

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Roam-back
Figure 55 Roam-back
1. A station is associated with AP 1, which is connected to AC 1.
2. The station disassociates with AP 1 and roams to AP 3 connected to AC 2. Now AC 2 is the FA
for the station.
3. The station is associated with AP 3 through inter-AC roam association. Prior to inter-AC roaming,
AC 1 should synchronize the station information with AC 2 through an IACTP tunnel.
4. The station then disassociates with AP 3 and roams back to AP 2 or AP 1 connected to AC 1,
which is its HA.
Configuring an IACTP mobility group
The IACTP service is part of the WLAN system, and can be enabled only after a mobility group and the
tunnel source IP address are configured.
An IACTP mobility group includes attributes such as the mobility tunnel protocol type, source IP address,
authentication mode, and member IP addresses.
To configure a mobility group and enable IACTP service for it:
Step Command Remarks
1. Enter system view. system-view N/A
2. Create a mobility group with
the specified name.
wlan mobility-group name
ACs in the same mobility group
should have the same mobility
group name.
3. Specify the mobility tunnel
protocol type.
mobility-tunnel { iactp | iactp6 }
Optional.
By default, the mobility tunnel
protocol type is IPv4.
4. Specify the tunnel source IP
address.
source { ip ipv4-address | ipv6
ipv6-address }
Not configured by default
IP network
AC 1
AP 1
AP 2
Fast- roam
association
IP network
AC 2
AP 3
Inter-AC roaming
Inter-AC
roaming
Inter-AC roam
association
Inter-AC roam
association