68 AT-8800 Series Switch User Guide
Software Release 2.6.1
C613-02039-00 REV A
which the whole trunk group belongs, unless it is first removed from the trunk
group. The members of a trunk group can be specified when it is created, and
ports can be added to or removed from a trunk group using the commands:
ADD SWITCH TRUNK=trunk PORT=port-list
DELETE SWITCH TRUNK=trunk PORT={port-list|ALL}
Ports which are members of a trunk group must operate in full duplex mode.
When a port is added to a trunk group, the speed setting for the group
overrides the speed setting previously configured for the port. When a port is
removed from a trunk group, the port returns to its previously configured
speed and duplex mode settings.
The speed of the trunk group can either be specified when it is created, or set
using the command:
SET SWITCH TRUNK=trunk
[SELECT={MACSRC|MACDEST|MACBOTH|IPSRC|IPDEST|IPBOTH}]
[SPEED={10M|100M|1000M}]
The SELECT parameter specifies the port selection criterion for the trunk
group. Each packet to be sent on the trunk group is checked, using the selection
criterion, and a port in the trunk group chosen down which to send the packet.
If MACSRC is specified, the source MAC address is used. If MACDEST is
specified, the destination MAC address is used. If MACBOTH is specified,
both source and destination MAC addresses are used. If IPSRC is specified, the
source IP address is used. If IPDEST is specified, the destination IP address is
used. If IPBOTH is specified, both the source and destination IP addresses are
used. The user of the switch should choose the value of this parameter to try to
spread out the load as evenly as possible on the trunk group. The default for
this parameter is MACDEST.
The SPEED parameter specifies the speed of the ports in the trunk group. For
gigabit ports, only the value 1000M is allowed. For switch ports, values of 10M
and 100M are allowed. The default is 100M. When a port is added to a trunk
group, its current speed and duplex mode settings are ignored and the port
uses the speed of the trunk group and full duplex mode.
To display information about trunks on the switch, use the command:
SHOW SWITCH TRUNK[=trunk]
To display the VLANs to which the ports in the trunk groups belong, use the
command:
SHOW VLAN[=ALL]
Port trunking must be configured on both ends of the link, or network loops may result.