Network Requirements
36 Deskphone SIP 9608, 9611G, 9621G, 9641G Administrator Guide Release 6.0.1
instruction and sends a message to the call server indicating the results. For more information,
see your call server administration documentation
IP address and settings reuse
After a successful registration with a call server, the telephone's IP address and parameter
values are saved in the phone’s non-volatile memory so that the telephone can reuse the saved
parameters if the DHCP or HTTP/HTTPS server is not available for any reason after a
telephone restart.
IP Address reuse was added in SIP software Release 2.5 to prevent infinite looping when
separate VLAN servers are used for voice and data VLANs, and a response is received from
the DHCP server on the data VLAN, but not on the voice VLAN.
Unless otherwise indicated, the values described here during IP address reuse are internally
provisioned or set by the process itself and not by manual administration.
●
Router(s) in Use - if no responses are received from the router(s) indicated in the
configuration parameter ROUTER (set using DHCP Option 3 or by a local administrative
procedure), and if REUSE = 1, then ROUTER_IN_USE will be set to
REUSE_ROUTER_IN_USE. With the exception of the ROUTER configuration parameter,
the other router-related parameters are internally set system values.
●
VLAN Check - During the VLAN check, if a reset is to be done and VLAN_IN_USE is not
zero, VLAN_IN_USE will be added to VLANLIST if it is not already on VLANLIST.
The VLAN detection process described in Automatically detecting a
VLAN on page 114 is
followed If tagging is off or if tagging is on and L2QVLAN is > 0, and if REUSETIME > 0, and
if REUSE_IPADD is not “0.0.0.0”. If VLANTEST expires, the value of VLAN_IN_USE is
added to VLANLIST if it is not already on VLANLIST.
If a DHCPOFFER is not received within REUSETIME seconds, or if a DHCPOFFER is received
that contains a value of L2QVLAN that is on VLANLIST, REUSE will be set to 1, IPADD will be
set to the value of REUSE_IPADD, NETMASK will be set to the value of REUSE_NETMASK,
ROUTER will be set to the value of REUSE_ROUTERS, and if the value of REUSE_TAGGING
is 1, 802.1Q tagging will be turned on with a VLAN ID equal to the value of L2QVLAN_INIT,
DHCP will then enter the “extended” REBINDING state, and operation will proceed as normal.
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