ASU, or Accelerated Software Upgrade, is a feature to minimize traffic loss when upgrading from one ASU supported EOS

SSU ASU 4.22.0F

ASU (or Accelerated Software Upgrade) is a feature that will minimize traffic loss when upgrading from one ASU

Smart System Upgrade (SSU) provides the ability to upgrade the EOS image with minimal traffic disruption. This is an existing feature on many fixed system products. This resource will outline the SSU feature in reference to CCS-720DP, CCS-722XPM-48Y4-F and DCS-7010TX.

Smart System Upgrade (SSU) provides the ability to upgrade the EOS image with minimal traffic disruption. This is an existing feature on many fixed system products. This resource will outline the SSU feature in reference to CCS-750XP, which is the first modular product to support SSU.

Leaf Smart System Upgrade (SSU) provides the ability to upgrade the EOS image with minimal traffic disruption. To perform the SSU, Spanning Tree Protocol (STP) should either be disabled or configured as MSTP. Meanwhile, all ports should be configured with admin edge ports (i.e., all ports are supposed to connect to host only) and the BPDU guard should be enabled for all edge ports.