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308 C
HAPTER
11: T
RUNKS
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If you are working with Gigabit Ethernet modules in a SuperStack II
Switch, keep in mind that each Gigabit Ethernet module uses an
internal trunk resource towards the limit of four. You can trunk Gigabit
Ethernet modules together (each with one port) to consolidate the
Gigabit trunk resources. If you have four trunks defined and you add a
Gigabit Ethernet module to the system, after a boot, the system
reports that the configuration is incompatible. You must delete one of
the existing trunks.
■
You must reboot the module at the end of the trunk definition
process. (You can define multiple trunks in one
bridge trunk define
operation.) On the CoreBuilder ® 9000, rebooting a module returns
you to the EME prompt, which requires you to reconnect to the
module.
■
The following considerations apply to the trunk clustering function,
MultiPoint Link Aggregation (MPLA), in the CoreBuilder 9400 system:
■
When you configure a new switch, define multipoint aggregated
links and reboot the system before you define other trunks and
VLANs on the switch.
■
On a reboot, existing trunks and VLANs are deleted, and the
default VLAN is restored. Trunked ports that were part of a VLAN
before reboot are moved to the default VLAN. You must then
redefine trunks or VLANs that you want to continue to use. See
Chapter 11.
Options
Prompt Description Possible Values [Default]
Mac type
(if you
have more
than one) Media type for the trunk. Depends on your
configuration:
■
FDDI
■
Fast_Ethernet
■
Gigabit_Ethernet
■
10/100BASE-TX
■
100BASE-FX
■
1000BASE-SX
■
? (for a list of selectable
media types)
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