Black Box LR1112A-T1/E1 Manual De Usuario

M

ANAGING

 R

EDUNDANT

CONNECTIONS

24.1 Trunk Group/Failover

Redundant connections are often required between Black Box systems and the switches to which they connect. The following 
diagram illustrates Ethernet redundancy between a Black Box LR1114A and a Layer 3 switch using failover on the Black Box 
and a trunk group configuration on the switch.

„

Black Box Ethernet 0 and 1 are connected to ports 1 and 2 of a trunk group configured switch.

„

The trunk group is configured with three IP addresses and a single MAC address. One IP address is utilized for 
WAN connectivity; the second address provides for communication between the switch and Black Box Ethernet 0. 
For this configuration, a third IP address is utilized for the failover path. 

„

The Black Box LR1114A is configured for failover on E0. When E0 loses link conectivity, it will failover to E1 and 
continue to pass traffic. When E0 recovers, traffic will be switched back.

WAN

Tasman 1400

Router

Layer 3 Switch
w/Trunk Group

Trunk Group

E1

E2

E0

E1

Failover

Tasman 1400

Layer 3 Switch

Router

E1: 199.1.1.1/30
E2: 199.1.1.5/30
WAN: 200.1.1.1/30

E0: 199.1.1.2/30
E1: 199.1.1.6/30
WAN: 10.1.1.1/30

WAN: 200.1.1.2/30