3Com CoreBuilder 3500, Implementation Manual, Page: 66 / 592

66 C
HAPTER
4: P
HYSICAL
P
ORT
N
UMBERING
Effects of Removing
a Module
When you remove a module and leave the slot empty, a number of
changes
occur.
Port-Numbering
Changes
The ports are sequentially renumbered when you remove a module from
slot 1, 2, or 3. Removing a module in slot 4 does not cause renumbering,
only a loss of those ports.
Example
If you have a fully loaded system with four 10/100BASE-TX modules and
you remove the module in slot 3 (ports 13-18), the ports associated with
the module in slot 4 (formerly numbered 19-24) are renumbered to
13-18. (See Figure 6.)
VLAN Changes
When you remove a module, VLAN changes occur as follows:
■
If you have a VLAN that contains ports that have been renumbered,
the renumbered ports now appear in the VLAN summary display.
Example
If a VLAN contained ports 20 through 22 before you removed the
module in slot 3, these ports show up as ports 14 through 16 in the
VLAN summary after you remove the module.
■
If you have a VLAN that includes ports associated with the removed
module, those ports are removed from the VLAN and the VLAN
summary display no longer shows those ports. (This change includes
trunk ports.)
Example
If a VLAN contained ports 17 through 24 before you removed the
module in slot 3, the removal of the module in slot 3 causes the
removal of previous ports 17 and 18 from the VLAN. (See Figure 6.)
The VLAN then contains the renumbered ports 13 through 18
(previously ports 19-24).
■
If there are no remaining ports in the VLAN once you remove the
module, the VLAN summary display shows the VLAN without any
ports.
See Chapter 9 for more information about VLANs.