SMC Networks SMC TigerStack II SMC6624M - Manual (Page 101)

6-9
Optimizing Port Usage Through Traffic Control and Port Trunking
Port Trunking
Op
timiz
in
g
Po
rt Usa
g
e
Thr
oug
h Tr
af
fic
Co
nt
rol
an
d
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