Cisco RF Gateway 1 Configuration Manual page 61

Ethernet Link
The current active port will continue to remain as active until there is a loss of link
(cable disconnection or port shutdown on the other end) on that port. If a link loss is
detected, the RFGW-1 will try to make the other available port as Active. If the link is
not present on both ports, then the last Active port will continue to remain as active
(of course without being able to receive any input) until a link is detected on any of
the port.
Primary Port and Backup Port
The primary port of a Port-pair is the port which the RFGW-1 will try to make as
Active during initialization (e.g. bootup, or when changing the redundancy from
manual to auto, or when changing the detection mode of the port-pair). The user can
choose either of the port as the primary port for the pair. The other port which is not
the primary is termed as Backup port.
Consider the following scenario for example,
Primary port for port-pair 1 is configured as port 2 with detection mode set to
Ethernet Link. Then, if during boot up,
Link status of the ports of pair 1
Link for both Port 1 and Port 2 is up.
Link for Port 1 is up. Link for Port 2 is down.
Link for Port 1 is down. Link for Port 2 is up.
Link for both Port 1 and Port 2 is down.
Revert to Primary Port
The 'Revert to Primary' is a functionality that is available when the RFGW-1 is
operating in Ethernet Link detection mode. If this is enabled and if the current active
port is the backup port, the RFGW-1 will periodically check the link status on the
primary port. If it finds the link has come back, then it will change the Active port as
primary port (even though link continues to exist in the backup). The inspection
period can be set anywhere from 1 second to 5 minutes.
Ethernet Link & UDP/L2TPv3
The current active port will continue to remain as active until there is a loss of link
(cable disconnection or port shutdown on the other end) or loss of traffic (no
UDP/L2TPv3 packets – zero input bitrate) on that port. If a link loss is detected or
UDP/L2TPv3 loss is detected, the RFGW-1 will try to make the other available port
as Active.
78-4025112-01 Rev H0
GbE Interface Configuration
Active Port
Port 2
Port 1
Port 2
Port 2
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