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CRS-311 1:1 Redundancy Switch
Modem, RMI/TMI, and Switch Configuration
Step
Task
From the SLM-5650/5650A front panel, navigate to Config: Remote
1
Option Card Addr
2
Set the Traffic IP Address of the Online Modem only.
3
Verify that the Traffic IP Address also appears on the Offline Modem.
The Traffic IP Address for both modems is "shared", but only the Online Modem
activates the Traffic IP Address. In addition, each modem must be given a unique
Management IP Address that does not float with Online/Offline status.
The modem uses the Management IP Addresses to mirror parameters. Upon boot up, the
Offline Modem requests a parameter update from the Online Modem. The Online Modem sends
the parameter update to the Offline Modem using the LAN. In addition, when you save the
online Network Processor parameters, the Online Modem sends parameter updates to the
Offline Modem. The Offline Modem receives parameter updates, updates itself, and then saves
those updated parameters in Flash memory.
Follow these steps to enter the Management IP Address on the Online Modem:
Step
Task
From the SLM-5650/5650A front panel, navigate to Config: Remote
1
Option Card Addr
2
Set the Management IP Address (Mgmt IP) of the Online Modem.
Follow these steps to enter the Management IP Address on the Offline Modem:
Step
Task
From the SLM-5650/5650A front panel, navigate to Config: Remote
1
Option Card Addr
2
Set the Management IP Address (Mgmt IP) of the Offline Modem.
The Management IP Addresses must be unique for both modems, but must be on the
same subnet.
The Online Modem always sends a gratuitous ARP for the Traffic IP Address when it comes
online. This causes networked device on the LAN to update their ARP tables and start sending
their IP traffic to the Online Modem.
The Offline Modem always filters all IP packets received from the WAN that are destined to LAN.
This keeps duplicate IP packets off the LAN. In addition, the offline Network Processor changes
all its WAN routes so that their "Next Hop IP Address" is the Online Modem's management IP
address. This allows remote access to the offline Network Processor from both the LAN interface
and WAN interface.
Network Proc.
Network Proc.
Network Proc.
4–6
Revision 7
MN/CRS311.IOM
EthernetConfig
EthernetConfig
EthernetConfig
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