Avaya Communication Server 1000 Installation And Commissioning Manual page 217

• Verify that Idle timer is configured to 300 seconds.
• Verify that the AP session timeout is at least 1800 seconds.
Avaya recommends that you configure the AP session timeout to 65534 seconds.
• Verify the following setting:
2230 AP DTIM = 3
• If there are multiple WLAN Security Switch 2270s installed, which are intended to
participate in a single RF mobility group, the following criteria must be met:
- The RF mobility group name must be same on all 2270s that belong to the RF
mobility group.
The mobility group name is case sensitive.
- Configure the virtual IP address for virtual interface to a nonroutable address (for
example, a fictitious address such as 1.1.1.1). The virtual IP address must be same
on all 2270s that belong to the RF mobility group.
- Manually add each switch to the list of RF mobility group members for each switch.
This is not a dynamic configuration.
For example, you have three switches: A, B, and C. You must add B and C as
members under mobility group configuration for switch A. You must add A and C as
members under mobility group configuration for switch B. You must add A and B as
members under mobility group configuration for switch C. The above
recommendation is true in the case of VoDATA as well.
WLAN Security Switch 2270 notes
The following list contains important information about the WLAN Security Switch 2270 and
pre-3.2.116.21 code.
• In the 2.0.x code for the WLAN Security Switch 2270, multicast packets are directly
handled by the CPU. Avaya Handsets use multicast packets only when the Push-to-talk
(PTT) feature is used. Because the CPU handles all multicast packets (control+data) with
the 2.0.c code, there can be problems with voice quality for PTT conversations, as well
as for regular calls.
The multicast issues are resolved in the 2.2.x code. With the 2.2.x code, to ease the CPU
processing load, multicast packets are off-loaded to another hardware chip within the
2270.
• In the 2.0.x code, if GOLD QoS is enabled for voice SSID, APs can fail to run RRM
sampling while packets are processed in the GOLD queue. Therefore, the AutoRFR
calculations on the WLAN Security Switch 2270 are further delayed. You must watch out
for AutoRF issues in such scenario. If it is a pure voice implementation, you can assign
SILVER QoS to voice SSID. This is only a best-effort recommendation. If the voice traffic
drops as a result, move back to GOLD QoS for voice.
• The PTT feature does not work in 2.0 code if the WLAN Security Switch 2270 is configured
in L2-LWAPP mode. This issue is resolved in the 2.2.x code.
• There is a client-handoff feature in the advanced options in the command line interface
(CLI) for release 3.0.107.0.
Avaya WLAN IP Telephony Installation and Commissioning
WLAN specific configuration
November 2010 217