SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
9.8 Redundancy
Ethernet interface redundancy is implemented by interface bonding: Ethernet
interface A and Ethernet interface B are bonded as 1 virtual interface. Only 1 of
the interfaces is active at a time.
When the modem (or modulator or demodulator) is configured as a layer-3 device
(IP router or IP terminating device), it is important that both interfaces share the
same virtual IP address (es) and virtual MAC address. This guarantees the fastest
switchover time from one interface to the other (the other devices in the same
subnet don't need to renew an ARP entry – the only thing that changes, is the
location of this MAC address. The principles used to make the network redundant
are compatible with HSRP or VRRP principles.
Figure 102 - Example of Equipment Redundancy Configuration
Figure 103 - example of Equipment and Port Redundancy Configuration
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