Dell PowerConnect B-RX Configuration Manual page 308

8
LAG formation rules
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Any number or combination of ports between 1 and 8 within the same chassis can be used to
configure a LAG. The maximum number of LAG ports is checked when adding ports to a LAG.
All ports configured in a LAG must be of equal bandwidth. For example all 10 G ports.
All ports configured in a LAG must be configured with the same port attributes.
Trunk formation rules are checked when a static or dynamic LAG is deployed.
A LAG must have its primary port selected before it can be deployed.
All ports configured in a LAG must be configured in the same VLAN.
Beginning with release 02.6.00, all ports must have the same PBR configuration before
deployment, during deployment the configuration on the primary port is replicated to all ports
and on undeployment each port inherits the same PBR configuration.
VLAN and inner-VLAN translation.
The trunk is rejected if any LAG port has VLAN or inner-VLAN translation configured
Layer 2 requirements.
The trunk is rejected if the trunk ports:
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do not have the same untagged VLAN component.
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do not share the same SuperSpan customer id (or cid).
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do not share the same vlan membership
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do not share the same uplink vlan membership
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do not share the same protocol-vlan configuration
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are configured as marble primary and secondary interfaces
Layer 3 requirements.
The trunk is rejected if any of the secondary trunk port has any Layer 3 configurations, such as
Ipv4 or Ipv6 address, ospf, rip, ripng, isis, etc.
Layer 4 (ACL) requirements.
All trunk ports must have the same ACL configurations; otherwise, the trunk is rejected.
The maximum number of ports supported in a LAG is 8.
NOTE
There are no SW limitations on the number of un-deployed or keep-alive LAGs. The trunk is a
deployed on a static or dynamic LAG.
Ports can be in only one LAG group. For example, port 1/4 cannot be in the LAG named "red"
and in the LAG named "blue".
All the ports in a trunk group must be connected to the same device at the other end. For
example, a if port 1/4 and 1/5 in Device 1 are in the same trunk group, both ports must be
connected to a ports in Device 2 or in Device 3. You cannot have one port connected to Device
2 and another port connected to Device 3.
All LAG member properties must match the primary port of the LAG with respect to the
following parameters:
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Port tag type (untagged or tagged port)
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Port speed and duplex
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QoS priority
BigIron RX Series Configuration Guide
53-1001986-01