Elan And Tlan Subnet Connections; Connect A Media Gateway Controller To The Elan Subnet - Nortel Media Gateway 1000E PRI Installation And Comissioning Manual

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Figure 11 "Multiserver port conﬁguration: dual homing (distributed)" (page

59)

conﬁguration that supports dual-homing of both the ELAN and TLAN.

Multiple Layer 2 switches are used to ensure there is no single point of

failure. This is the recommended conﬁguration in a dual CPU Call Server

conﬁguration. In this conﬁguration, the Call Server beneﬁts from the

dual-homing feature of the MGC and remains connected to the network

even if one of the Layer 2 ELAN subnet switches fail, therefore avoiding a

CPU switchover because of a network outage.

Figure 11

Multiserver port conﬁguration: dual homing (distributed)

Cascading of the MGC network connections is allowed, up to a maximum

of two chassis. The MGCs can be cabled directly without the need for

external Layer 2 switches, which is the type of conﬁguration recommended

for a pure TDM solution.

ELAN and TLAN subnet connections

An MGC installed in the PRI Gateway requires both ELAN subnet and

TLAN subnet connections. These procedures are the same as for the

MG 1000E with the MGC. For a full description of connecting CS 1000E

system components, see Communication Server 1000E Installation and

Commissioning (NN43041-310).

Follow the steps in

the ELAN subnet" (page 60)

Media Gateway 1000E PRI Gateway Installation and Commissioning

shows a typical network conﬁguration for a dual CPU Call Server

Procedure 9 "Connecting a Media Gateway Controller to

Nortel Communication Server 1000

NN43041-311 01.01 Standard

Release 5.0 30 May 2007

ELAN and TLAN subnet connections 59

to connect an MGC to the ELAN subnet.

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