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WLAN specific configuration 173
• Verify that the AP session timeout is at least 1800 seconds.
Nortel recommends that you configure the AP session timeout to
65 534 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. Nortel 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
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 03.04 Standard
23 September 2008
Copyright © 2004–2008 Nortel Networks
.