DELL N3000 User Manual

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Configuring Link Aggregation
MLAG member ports: Ports on the peer MLAG switches that are part of the 
MLAG interface (P1 on SW1 and S1 on SW2).
Non-redundant ports: Ports on either of the peer switches that are not part of 
the MLAG (ports P4 and S4). MLAG interfaces and non-redundant ports 
cannot be members of the same VLAN, i.e. a VLAN may contain MLAG 
interfaces or a VLAN may contain non-redundant ports, but not both.
MLAG peer-link: A link between the two MLAG peer switches (ports 
P2,P3,S2,S3). Only one peer-link can be configured per device. The peer-link 
is crucial for the operation of the MLAG component. A port-channel must be 
configured as the peer-link. All VLANs configured on MLAG interfaces must 
be configured on the peer-link as well.
MLAG Dual Control Plane Detection link: A virtual link that is used to 
advertise the Dual Control Plane Detection Protocol (DCPDP) packets 
between the two MLAG switches (ports P4, S4). DCPDP is optional but 
should be used with caution. The protocol is used as a secondary means of 
detecting the presence of the peer switch in the network. The DCPDP 
protocol must not be configured on MLAG interfaces.
Configuration Consistency
The administrator must ensure that the neighboring devices connected to 
MLAG switches perceive the two switches as a single spanning tree and Link 
Aggregation Control Protocol (LACP) entity. To achieve this end, the 
following configuration settings must be identical for MLAG links on the 
MLAG peer switches:
Link aggregation
Hashing mode
Minimum links
Static/dynamic LAG
LACP parameters
• Actor parameters
• Admin  key
• Collector max-delay
• Partner parameters