Learn the details for configuring the network uplinks.
Every Lenovo Converged System has at least two 10 Gbps short-range optical Ethernet interfaces that are associated with the green network, at least one 1 Gbps BASE-T (RJ45, CAT-5/CAT-6 cable) interface for the purple network, and one BASE-T interface for the gold network.
All switches have the Per-Vlan Rapid Spanning Tree (PVRST) protocol that is enabled, with each virtual LAN (VLAN) assigned to a separate Spanning Tree Group (STG). The in-chassis 10 Gb Ethernet switches ship with bridge priority 61440. If you have top-of-rack switches, they ship with bridge priority 32768. This should prevent any routing loops, regardless of how many cables you plug into each uplink group.
If you have top-of-rack switches, the green and purple uplink ports are on the G8264 switches, and all of the empty ports on the G8052 switches serve as uplink ports for the yellow network. In these two configurations, there is no need for you to directly access the 10 Gb Ethernet switches that are in the chassis.
If there are no top-of-rack switches, all of the uplink ports are on the 10 Gb Ethernet switches that are in the chassis.
Within a switch, all green uplink ports have Link Aggregation Control Protocol (LACP) enabled with a common key. If you connect with an LACP-aware partner, those ports form a common aggregate (also called a trunk or portchannel), that allows traffic that is run in parallel across all of the ports.
Likewise, if you use a top-of-rack G8264 switch, the purple uplink ports are configured to share an LACP key.