Hot Swapping And Port Trunking - Allied Telesis AT-8400 Series Reference Manual

Installing and Removing Line Cards
Hot Swapping
and Port
Trunking
70
When you remove a line card and do not replace it, the information you
configured for the line card is saved on the AT-8401 management card.
However, removing a line card and not replacing it affects software
configuration of the following features:
❑ Port trunking
❑ VLAN
❑ GARP VLAN Registration Protocol (GVRP)
❑ Multiple VLANs
❑ 802.1x Port-Based Network Access Control
❑ STP and RSTP
The changes that result from removing and replacing a line card are
discussed in the following sections. For detailed information about port
trunking, VLAN, and RSTP features, see the AT-S60 Management
Software User's Guide.
You can use the AT-S60 software to configure port trunking on
individual ports. For the AT-8400 Series Switch, a port trunk consists of a
maximum of eight ports that have been grouped together to function as
one logical path. The general rule for port trunking is when you replace a
line card with the same type of line card, the trunk is retained. When you
replace a line card with a different type of line card and select Save
Configuration changes from the Main Menu, then the trunk is changed
permanently. The ports on the line card are removed from the port
trunk.
Before you remove or replace line cards that are configured in your port
trunk, you need to consider the implications to your software
configuration. If you have configured a port trunk on your switch and
you remove a line card whose ports are in the trunk, then the ports
belonging to the removed line card are also removed from the port
trunk. However, the trunk name, trunk ID, and type are retained in the
memory located on the AT-8401 management card.
Port trunks that are comprised of AT-8411 line cards are configured
differently from port trunks that are comprised of AT-8413 line cards. For
an AT-8411 port trunk, all ports included in the trunk must reside on the
same line card. Consequently, when you remove the AT-8411 line card
all the ports included in the port trunk disappear. The port trunk
configuration is saved on the AT-8401 management card. If you insert
another AT-8411 line card in the same slot, the original port trunk is
restored. If you insert a different type of line card and click Save
Configuration changes at the Main Menu, the port trunk configuration
is lost.