Sun Microsystems GigabitEthernet PCI Adapter User Manual page 44

2. The port to which the secondary adapter is connected must be the port that blocks.
If there is more than one switch in the spanning tree, be certain that the secondary
adapter is not attached to the root switch of the spanning tree. Also, be sure that the
port path cost of the switch port connected to the secondary adapter is higher than
the other ports in the loop.
For example, in the following redundant switch configuration, the switch port
connected to adapter #2 must have the highest port path cost of any of the four ports
in the loop:
3. Create the /etc/redund.vge1 file.
4. Use your regular text editor to put the number 0, the instance number of the
primary adapter, into the file /etc/redund.vge1.
Put the number 0 in the file, without spaces or blank lines.
Note – Do not configure an /etc/hostname.vge<num> entry for a redundant adapter.
Do not configure VLAN support for the secondary adapter in a Dual Homing
configuration. If the secondary adapter becomes primary, it takes on the
configuration of the primary adapter. Serious configuration problems will occur if
there are VLAN configuration files for the secondary adapter.
26 Sun GigabitEthernet PCI Adapter 1.1 User's Guide • March 1998
1
Inter-switch path
required for loop
condition
Port to active adapter
needs lower path cost
2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
9
10/100 Base - TX Gigabit Ethernet
Loop ports need
lower path cost
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
9
10/100 Base - TX Gigabit Ethernet
Port to secondary
adapter must have
highest path cost
to block
Server
#1
#2