PureStream PureLink VIP-NET-M28A Media Hub, User Manual

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VIP-NET-M28A Network Switch - USER MANUAL
VERSION 1.0
STP/RSTP/MSTP
STP (Spanning Tree Protocol), and its advanced versions RSTP (Rapid Spanning Tree Protocol) and
MSTP (Multiple Spanning Tree Protocol), are designed to prevent network loops and provide network
redundancy. Network loops occur frequently in large networks as when two or more paths run to the same
destination, broadcast packets may get in to an infinite loop and hence causing congestion in the network.
STP can identify the best path to the destination, and block all other paths. The blocked links will stay
connected but inactive. When the best path fails, the blocked links will be activated. Compared to STP
which recovers a link in 30 to 50 seconds, RSTP can shorten the time to 5 to 6 seconds.
STP Bridge Status
This page shows the status for all STP bridge instance.
Label Description
MSTI The bridge instance. You can also link to the STP detailed bridge status.
Bridge ID The bridge ID of this bridge instance.
Root ID The bridge ID of the currently selected root bridge.
Root Port The switch port currently assigned the root port role.
Root Cost
Root path cost. For a root bridge, this is zero. For other bridges, it is the
sum of port path costs on the least cost path to the Root Bridge.
Topology Flag The current state of the Topology Change Flag for the bridge instance.
Topology
Change Last
The time since last Topology Change occurred.
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