Page 608 of 910 IP Line administration using Element Manager
553-3001-365 Standard 4.00 August 2005
c. Management LAN (ELAN) gateway IP address: Enter the
Management LAN (ELAN) gateway IP address in dotted decimal
format. This is the IP address of the gateway of the subnet to which
the Voice Gateway Media Card belongs. This is the IP address of the
router interface on the ELAN subnet, if present. If the subnet does not
have a Management LAN gateway, enter 0.0.0.0.
• When a Management LAN gateway is added to the ELAN subnet,
it must restrict access so that only authorized traffic is permitted
on the ELAN subnet.
• The router must disable the BootP relay agent for the ELAN
network interface.
• The router must block all broadcast and multicast traffic from the
ELAN subnet and enable only proper access (that is, only
authorized traffic and users coming through the ELAN gateway).
d. Management LAN (ELAN) subnet mask: Enter the Management
LAN subnet mask address in dotted decimal format. This is the
subnet mask that is used along with the ELAN network interface IP
address to identify to which subnet the Voice Gateway Media Card
belongs. When changing these subnet masks, consider the
possibility of conflict between the ELAN and TLAN network interface
IP addresses. Consult with the network administrator before making
any changes to subnets. Refer to “Codecs” on page 287.
When changing the Management LAN (ELAN) network interface IP
address, this must be coordinated with the IP address on the Call
Server (Active ELNK) network interface. Changes must also be
coordinated with the following:
• Management LAN gateway, and other IP devices on the ELAN
subnet
• any other devices on the ELAN subnet and customer’s enterprise
network subnet that need to communicate with IP Line 4.5
• devices that are looking to receive SNMP traps
e. Voice LAN (TLAN) subnet mask: Enter the Voice LAN subnet mask
address in dotted decimal format. This is the subnet mask that is
used, along with the TLAN network interface IP address, to identify
the subnet to which the Voice Gateway Media Card belongs.
Coordinate with the Voice LAN gateway (router). When changing the
Voice LAN (TLAN) subnet mask, the change must be coordinated