Dual Lan Ethernet - 3Com PathBuilder S200 Series Owner's Manual

Dual LAN Ethernet

What Is It?
The Dual LAN Ethernet feature lets your PathBuilder S24x, 26x, and 27x switch
support up to two Ethernet LAN interfaces to perform bridging and routing of LAN
traffic across multiple LANs.
Before Multiple Ethernet LAN, the PathBuilder S24x, 26x, and 27x switch
supported only one Ethernet LAN port for remote bridging and routing of LAN
traffic. However, with the Multiple Ethernet LAN feature, you can bridge and route
LAN traffic locally and remotely using up to two LAN ports on each PathBuilder
S24x, 26x, and 27x switch, as shown in Figure 55.
Sample Application Figure 55 shows a sample application for the Multiple Ethernet LAN feature.
Figure 55. Example of Multiple Ethernet LAN
Limitations
The PathBuilder S24x, 26x, and 27x switch supports only two Ethernet LAN ports at
one time. If you configure more than two Ethernet ports on a PathBuilder S24x, 26x,
and 27x switch, the system initializes only the first two ports you configure during
system powerup.
Bridging In a Transparent Bridging environment, if you connect both Ethernet LAN ports to
the same Ethernet segment, you must enable Spanning Tree. Failure to enable
Spanning Tree in this configuration is a violation of the rules of Transparent
Bridging.
Bridging
T0008-16F
Note
It is recommended that you configure the first LAN card in your device as
Bridge Link Number 1 or Router Interface Number 1. Failure to do so may cause
your device to perform continuous resets when you power up the device after
reinstalling an earlier release of operating software.
Ethernet 1
Port 13
PB S200
Port 19
Ethernet 2
Ethernet 1
WAN PB S200
Ethernet 2
Dual LAN Ethernet
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Release 5.2M