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174 Troubleshooting WLAN IP Telephony installations
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.
For more information, go to w
ww.cisco.com.
To configure the client handoff to occur after a selected number
of 802.11 data packet excessive retries, use the config advanced
client-handoff command:
config advanced client-handoff <num_of_retries>
Default: 0 excessive retries (disabled)
The command to configure the client handoff to 100 excessive retries
is:
config advanced client-handoff 100
ATTENTION
2.x code is not supported. Nortel recommends that sites upgrade to 3.2.116.21
code. Contact Nortel GNTS Technical support to obtain this code—do not
download it from the Cisco Web site.
Specific Cisco configuration examples
Table 22 "1230 connected with 2950 and 2245 connected with 2950"
(page 174) provides the steps to configure the Cisco Aironet 1230
connected with a Cisco Catalyst 2950, and the WLAN IP Telephony
Manager 2245 connected with the Cisco Catalyst 2950.
Table 22
1230 connected with 2950 and 2245 connected with 2950
AP: 1230 2950 connected the APs 2950 connected to 2245
1
class-map match-all
class_SVP_VoIP match
ip protocol 119 (protocol
119 marked the value of
cos 5)
mls qos map cos-dscp 0 8 16 40
32 46 48 56
mls qos map cos-dscp 0 8 16 40
32 46 48 56
2
Policy-map wireles
s-SVP-VoIP class
class_SVP_VoIP
wrr-queue bandwidth 25 25 50 0
wrr-queue cos-map 10124
wrr-queue cos-map 3367
wrr-queue cos-map 4 5
(dscp 40 and 47 by default are
marked as cos 5)
wrr-queue bandwidth 25 25 50 0
wrr-queue cos-map 10124
wrr-queue cos-map 3367
wrr-queue cos-map 4 5
(dscp 40 and 47 by default are
marked as cos 5)
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 03.04 Standard
23 September 2008
Copyright © 2004–2008 Nortel Networks
.