Page 132 of 378 ITG Engineering Guidelines
553-3001-202 Standard 1.00 April 2000
Multiple ITG nodes on the same E-LAN and T-LAN segments
There are several configurations where it can be acceptable to put multiple
ITG nodes on the same dedicated E-LAN and T-LAN segments (separate
subnets), or on a dedicated E-LAN/T-LAN segment (single subnet):
1Several ITG nodes belonging to the same customer in the same
Meridian 1 PBX may be configured to route calls with different
CODECs depending on the digits dialed or the NCOS of the originating
terminal, or to limit the maximum number of ITG calls to a particular
destination node. The traffic engineering considerations on the T-LAN
should determine how many different ITG nodes can be configured on
the same LAN segment.
2Layer Two (10 BaseT or 100 Base TX) switching equipment or ATM
infrastructure can support a virtual LAN (VLAN) segment that is
distributed across a campus or larger corporate network. In th is case
some or all of the ITG destination nodes can be on the same subnet.
3In test labs, training centers, and trade shows it is common for desti nation
nodes to be located on the same LAN segment and subnet.
You must not place other IP devices, either Nortel Networks’ or other
vendors’ products, on the same T-LAN subnet with the ITG nodes.
Setting up the E-LAN or management subnet
The management LAN, or E-LAN, is 10BaseT Ethernet. Very li tt le tra ffi c is
generated by the ITG node on this network. Cards generate this traffic when
the cards have been rese t an d are looking for the active le ader, and when
SNMP traps are emitted due to ITG card events and errors. A standard
configuration is an 8-port passive hub connecting the ITG system
management Ethernet to the MAT PC through the E-LAN. If the E-LAN also
carries functional signalling traffic for Sympos ium Call Center Server
(SCCS), Small Symposium Call Center (SSCC), or Call Pilot multimedia
message server, then the E-LAN can be configured on a switching hub to
maximize data throughput.
Selecting public or private IP addresses
The customer must consider a number of factors to determine if the T-LAN
and E-LAN will use private (internal IP addresses) or public IP addresses.