Dell PowerConnect 5548 User Guide - Page 442
LAG State, Broken, Disabled, Blocking, RSTP Discarding State, Listening, Learning, Forwarding
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- LAG State - Displays the current STP state of the LAG. If enabled, the LAG state determines what forwarding action is taken on traffic. If the bridge discovers a malfunctioning LAG, the LAG is placed in the Broken state. Possible LAG states are: • Disabled - STP is currently disabled on the LAG. The LAG forwards traffic while learning MAC addresses. • Blocking - The LAG is blocked and cannot be used to forward traffic or learn MAC addresses. • RSTP Discarding State - The LAG does not learn MAC addresses and does not forward frames. This state is union of Blocking and Listening state introduced in STP (802.1.D). • Listening - The LAG is in the listening mode, and cannot forward traffic or learn MAC addresses. • Learning - The LAG is in the learning mode, and cannot forward traffic, but it can learn new MAC addresses. • Forwarding - The LAG is currently in the forwarding mode, and it can forward traffic and learn new MAC addresses. • Broken - The LAG is currently malfunctioning, and cannot be used for forwarding traffic. - Role - Displays the LAG role assigned by the STP algorithm that provides STP paths. The possible options are: • Root - This LAG provides the lowest cost path to forward packets to root switch. • Designated - This LAG is the interface through which the bridge is connected to the LAN, which provides the lowest cost path from the LAN to the Root Bridge. • Alternate - This LAG provides an alternate LAG to the root switch from the root interface. • Backup - This LAG provides a backup path to the designated port. Backup ports occur only when two ports are connected in a loop by a point-to-point link. Backup ports also occur when a LAN has two or more connections connected to a shared segment. • Disabled - This LAG is not participating in the Spanning Tree. 442 Dell PowerConnect 55xx Systems User Guide