Configuring Trunk Groups and Dynamic Link Aggregation
December 2005 © Foundry Networks, Inc. 10 - 3
Figure 10.2 shows an example of a trunk group between a server and a Foundry device.
Figure 10.2 Trunk group between a server and a Foundry Stackable Layer 2 Switch or Layer 3 Switch
Trunk Group Rules
• Table 10.2 lists the maximum number of trunk groups you can configure on a Foundry FastIron device and the
valid number of ports in a trunk group.
• You cannot configure a port as a member of a trunk group if 802.3ad link aggregation is enabled on the port.
• Unlike the FES and other Foundry devices, trunk groups on the FESX, FSX, and FWSX are not classified as
switch trunk groups or server trunk groups.
• Table 10.2 lists the maximum number of trunk groups you can configure on a FESX, FSX, and FWSX, and the
valid number of ports in a trunk group.
• Multi-slot trunk groups are supported only on FSX devices.
• Although the FESX, FSX, and FWSX devices have port ranges, they do not apply to trunk groups.
• You can select any port to be the primary port of the trunk group.
• You cannot combine Gigabit and 10-Gigabit ports in the same trunk group.
• Port assignment on a module must be contiguous. The port range on the module cannot contain gaps. For
example, you can configure ports 1, 2, 3, and 4 on a module together as a trunk group but not ports 1, 3, and
4 (excluding 2).
Table 10.2: Trunk Group Support
Model Maximum Number
of Gigabit Trunk
Groups
Valid Number of
Ports in a Group
FESX424 and
FWSX424
13 2, 3, or 4
FESX448 and
FWSX448
25 2, 3, or 4
FSX 31 2, 3, or 4
......
Multi-homing
Server
Multi-homing adapter
has the same IP and MAC address
Trunk Group
FastIron Switch
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