User guide

OmniPCX Enterprise / OmniPCX Office
TECHNICAL RELEASE NOTE OF VoWLAN
R4.2.1
Ed. 01 / 03 March 2010 7 TC1308
4.4 SVP Server Software Version 17x.037
The main evolution in 17x.037 version for SVP servers is the load balancing enhancement for large
networks, through different mechanisms such as the handset distribution imbalance, the SVP locking
feature and the check-in throttling feature. Some other improvements exist for SVP servers self
healing like missed ding counter for the master recovery.
• Handset distribution imbalance: phones receive Service Rejected commands to force the
handset to reboot and check-in with a new SVP server.
• SVP locking: the SVP lock feature now load balances phones off the locked SVP per a load
balancing algorithm.
• Check-in throttling: selectable levels throttling which correspond to SRP, SIP, NOE, CCMS
and Unistim signaling.
4.5 VoWLAN R4.2.1 Restrictions and Pre-Requisites
This section gives the known restrictions reported during tests and related to VoWLAN R4.2.1, the
restrictions in VoWLAN R4.1 can stay valid.
4.5.1 General restrictions
− WMM-AC feature: Compatibility between MIPT 120.023 release and AOS version:
• AOS 3.4.1.x (min) with PEF license is mandatory for MIPT v120.023 deployment.
• ACM of Voice and Video in EDCA parameters of OAW must be configured to be 1.
Otherwise, WMM-AC feature cannot be used, bringing problems during MIPT software
upgrade.
− Upgrade OAW to 3.4 directly from 2.5 releases is not supported.
− OAW internal database (and so switches configurations) is not compatible with previous releases.
Downgrade from AOS 3.4 to previous versions will wipe out the internal database: precautions
must be applied before upgrading to 3.4 if future downgrade is required.
• Make first a backup of the pre-3.4.1.x configuration before the upgrade to 3.4.1.x, in case of
a necessary downgrade. The OAW administrator will be informed by a warning during the
downloading of a pre-3.4.1.x release in flash, or during the change of a boot partition
including a pre-3.4.1.x release.
− CAC value after upgrade to AOS 3.4.1.x is the minimum of the different ALG call capacities set
in pre-AOS 3.4.1.x: It must be reconfigured after upgrade.
− CAC value is not updated immediately after the call release (30 seconds delay for the call status
update).
− It is not possible to mix security types within a specific SSID.
− It is not possible to mix QoS methods (WMM, CCX or SVP mode) on the same 802.11 radio.
− The maximum WLAN handsets authorized on the same AP is 9.
− IGMP multicast requires the use of a multicast aware router and the proxy IGMP management on
the OAW.
− RSTP protocol for the OAW 3.4.1.x is not compatible with the RSTP 1x1 VLAN basis for Alcatel-
Lucent. This restriction exists only on 450x switches models which support the RSTP.