Port Trunking - Lenovo Flex System Fabric CN4093 Application Manual

Port Trunking

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CN4093 Application Guide for N/OS 8.2
Lenovo N/OS 8.2 supports port trunking for FCoE connections. The Link
Aggregation (LAG) can be used for separate FCoE traffic, or for Ethernet and FCoE
traffic. FCoE and Ethernet traffic can co‐exist within the same trunk (ports). By
default, FCoE servers (CNA/HBA) do not support trunk, while Ethernet
(NIC/CNA) are trunk capable.
Uplink ports, connected to the FCF, can be grouped as static or dynamic trunks.
Internal ports cannot be grouped as trunks.
Normal trunk operations such as creating/enabling the trunk, and
adding/removing member ports can be performed. When a port is added to a
trunk group, FCFs previously detected on the port will be deleted. The deleted FCF
may be relearned later. However, this may cause flickering in the network traffic.
Priority‐based Flow Control (PFC), and Data Center Bridging Exchange (DCBX)
are configured on a per‐port basis. Each port in a trunk must have the same PFC,
and DCBX configuration. When a port ceases to be the trunk group member, its
configuration does not change.