Rack Requirements; Interfacing With The Ip Networks; Method One: Cluster Of Two Interconnected L-2 Switches; Figure 4-1: Clustering Of Two L-2 Switches - Nortel Media Gateway 3500 Installation, Operation And Maintenance Manual

4.3.7

Rack Requirements

Telco Rack
Space
4.4

Interfacing with the IP Networks

To ensure full high availability capabilities, one of methods detailed below must be
incorporated into the network infrastructure.
4.4.1

Method One: Cluster of Two Interconnected L-2 Switches

In a configuration with the cluster of two interconnected L-2 switches, the Media Gateway
3500's uplink is connected directly to L-2 switches. The two Ethernet Switch boards must
not be interconnected externally as this, combined with the intercommunication between
the L-2 switches, causes a closed loop in the network.
Installation, Operation, Maintenance Manual

Table 4-15: Rack Requirements

19-inch
As per GR-63-CORE
Maintenance access 762 mm (2' 6")
Wiring access 610 mm (2')

Figure 4-1: Clustering of Two L-2 Switches

HA Router / Clustering
L2 Switch
Communication
Active Ethernet Switch
Board
Media
Gateway
Boards
WAN
L2 Switch
Between
1 GbE
Standby Ethernet Switch
F-Link
Board
SC Boards
58
Media Gateway 3500
Document # LTRT-90704