Filter
Top Products
6-9
Optimizing Port Usage Through Traffic Control and Port Trunking
Port Trunking
Optimizing Port Usage
Through Traffic Control and
Port Trunking
Port Status and ConfigurationFeatures
Port trunking allows you to assign up to four physical links to one logical link
(trunk) that functions as a single, higher-speed link providing dramatically
increased bandwidth. This capability applies to connections between back-
bone devices as well as to connections in other network areas where traffic
bottlenecks exist. A trunk group is a set of up to four ports configured as
members of the same port trunk. Note that the ports in a trunk group do not
have to be consecutive. For example:
Figure 6-3. Conceptual Example of Port Trunking
With full-duplex operation in a four-port trunk group, trunking enables the
following bandwidth capabilities:
Table 6-2. Bandwidth Capacity for Trunk Groups Configured for Full-Duplex
Feature Default Menu CLI Web
viewing port trunks n/a page 6-15 page 6-17 page 6-22
configuring a static trunk
group
none page 6-15 page 6-20 —
configuring a dynamic LACP
trunk group
LACP passive — page 6-21 —
10 Mbps Links 100 Mbps Links 1000 Mbps Links
2 Ports Up to 40 Mbps Up to 400 Mbps Up to 4000 Mbps
3 Ports Up to 60 Mbps Up to 600 Mbps n/a*
4 Ports Up to 80 Mbps Up to 800 Mbps n/a*
*
The SMC6624M offers a maximum of two gigabit links if optional gigabit transceivers are
installed.
Switch 1:
Ports 1 - 4
configured
as a port
trunk group.
The multiple physical links in a trunk behave as one logical link
port 1
port 2
port 3
port 4
port 5
port 6
port 7
.
.
.
port 1
port 2
port 3
port 4
port 5
port 6
port 7
.
.
.
Switch 2:
Ports 3 - 6
configured
as a port
trunk group