MCLAG Topologies Configuring Multi-chassis Link Aggregation
page 10-16 OmniSwitch AOS Release 7 Network Configuration Guide June 2013
This topology violates the principle that each edge switch can only be part of a single MCLAG domain
and increases the configuration complexity. Now all the four multi-chassis peers need to have consistent
configurations (for example, LACP System ID in order for the edge switch to be able to negotiate the four
links as part of the same aggregate).
Edge Switch to Multiple MCLAG Domains
This topology introduces the risk of a possible loop indicated by the arrows. Since Spanning Tree will not
run over the MCLAG aggregates, this loop cannot be prevented.
Edge Switch to Multiple MCLAG Domains
MC-LAG
MC-LAG
MC-LAG
L2 Bridging
L3 Routing
MC-LAG
Loop!!!
MC-LAG
MC-LAG
MC-LAG
MC-LAG
MC-LAG
L2 Bridging
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