Topology Switching; Network Reliability - 3Com 2103R-CSDI Installation Manual

Edge Router Module Features 1-7

Topology Switching

Using topology switching you can:
Switch the ONline Edge Router module among any of three Ethernet
networks (channels) on the hub backplane
Switch the ONcore Edge Router module among any of eight Ethernet
networks (channels) on the hub backplane
You perform topology switching using:
Network management module commands
Simple Network Management Protocol (SNMP)
You do not have to swap cables or move the Edge Router module to move
the routing or bridging functions to a different network within an ONline or
ONcore hub. You can enter a command through one of the 3Com
management modules and the network change is made automatically.

Network Reliability

The Edge Router module lets you implement several levels of reliability in
your network as follows:
By routing the Edge Router module's serial and auxiliary ports in parallel,
you can create up to three redundant links.
If the primary link fails, you can have up to two backup links in place to
ensure application availability.
These links can also implement load-balancing to enhance network
performance. An example of a reliable network configuration is shown in
Figure 1-3.