TOI Author :: Xiaohui Gong

On MLAG devices, flood traffic over the peer link follows split-horizon rules to avoid duplicate delivery of packets on MLAG interfaces. However, when one of the MLAG devices becomes inactive, peer-link flooding can cause double delivery or Layer 2 loops. To mitigate this risk, peer-link forwarding restriction was introduced. As of 4.34.0F, support was added for peer-link forwarding restriction when MLAG is enabled but not fully formed to the primary or secondary role. In this transitional state, only MLAG VLANs carrying MLAG control (PDU) traffic are allowed over the peer link. As of 4.34.2F, peer-link forwarding restriction is enabled by default. Users may still disable the feature manually as needed.