SMC Networks SMC8724ML3 Switch User Manual


 
L
INK
A
GGREGATION
C
OMMANDS
4-205
Guidelines for Creating Trunks
General Guidelines –
Finish configuring port trunks before you connect the corresponding
network cables between switches to avoid creating a loop.
A trunk can have up to 8 ports.
The ports at both ends of a connection must be configured as trunk
ports.
All ports in a trunk must be configured in an identical manner, including
communication mode (i.e., speed and duplex mode), VLAN
assignments, and CoS settings.
Any of the Gigabit ports on the front panel can be trunked together,
including ports of different media types.
All the ports in a trunk have to be treated as a whole when moved from/
to, added or deleted from a VLAN via the specified port-channel.
STP, VLAN, and IGMP settings can only be made for the entire trunk
via the specified port-channel.
Dynamically Creating a Port Channel –
Ports assigned to a common port channel must meet the following criteria:
Ports must have the same LACP system priority.
Ports must have the same port admin key (Ethernet Interface).
If the port channel admin key (lacp admin key - Port Channel) is not set
when a channel group is formed (i.e., it has the null value of 0), this key
is set to the same value as the port admin key (lacp admin key - Ethernet
Interface) used by the interfaces that joined the group.
However, if the port channel admin key is set, then the port admin key
must be set to the same value for a port to be allowed to join a channel
group.
Trunk Status Display Commands
show interfaces
status port-channel
Shows trunk information NE, PE 4-196
show lacp Shows LACP information PE 4-212
Table 4-52 Link Aggregation Commands (Continued)
Command Function Mode Page