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STP/RING PAGE – OVERVIEW
Choosing the Spanning Tree Protocols
The Spanning Tree algorithm works by designating a single switch (The Root Bridge) in the
network, as the root or the parent to all the switches. All the switches in the network will use
the same algorithm to form unique paths all the way back to the Root Bridge. Some switches
establish a blocking point (a port on a switch) somewhere along the path to prevent a loop.
There are 3 versions of the Spanning Tree protocol, STP, RSTP, MSTP, and they are all
backwards compatible with each other.
Spanning Tree Protocol (STP)
This is the original Spanning Tree protocol, and it has been supersede by both the
RSTP and MSTP protocol. It is based on a network with a maximum diameter of no
more than 17 switches. It uses timers to synchronize any changes in the network
topology, and this could take minutes. It is not recommended that you use this
version of the Spanning Tree protocol.
Rapid Spanning Tree protocol (RSTP)
The RSTP protocol is the new enhanced version of the original STP protocol. It uses
an enhanced negotiation mechanism to directly synchronize any topology changes
between switches; it no longer uses timers as in the original STP protocol, which
results in a faster re-convergence time. The maximum allowed network diameter for
the RSTP protocol is 40 switches.
Multiple Spanning Tree Protocol (MSTP)
The MSTP protocol extends the RSTP protocol by simultaneously running multiple
instances of the Spanning Tree Protocol and mapping different VLANs to each
instance, thus providing load balance across multiple switches. The MSTP protocol
accomplishes this by creating new extended sections within the RSTP protocol,
called Regions. Each region runs its own instance of the Spanning Tree Protocol.
Within each Region, the MSTP protocol can accommodate a network diameter of up
to 40 switches. There can be a maximum of 40 Regions in a single MSTP network.
Note:
If a faster recovery time is required, EtherWAN’s proprietary
α
-Ring
provides a recovery time of <15MS with up to 250 switches. See
on page
91
EX24000 Switch Users Guide
Summary of Contents for EX24000
Page 32: ...Figure 8 IP Address 32 EX24000 Switch Users Guide ...
Page 42: ...Figure 14 Remote Logging Page 42 EX24000 Switch Users Guide ...
Page 53: ...Figure 22 Port Security 53 EX24000 Switch Users Guide ...
Page 61: ...Figure 23 Bridging 61 EX24000 Switch Users Guide ...
Page 67: ...Figure 26 Storm Detect 67 EX24000 Switch Users Guide ...
Page 72: ...Figure 31 Port Mirroring 72 EX24000 Switch Users Guide ...
Page 88: ...Figure 38 LACP Trunking 88 EX24000 Switch Users Guide ...
Page 93: ...Figure 39 STP Ring Global Configuration 93 EX24000 Switch Users Guide ...
Page 97: ...Figure 42 Max Age Hello Timer Forward Delay 97 EX24000 Switch Users Guide ...
Page 116: ...Figure 55 Port Cost Priority 116 EX24000 Switch Users Guide ...
Page 132: ...Figure 63 Advanced Per Port Configuration 132 EX24000 Switch Users Guide ...
Page 163: ...Figure 78 SNMP General Settings 163 EX24000 Switch Users Guide ...
Page 181: ...Figure 91 LLDP Global Settings 181 EX24000 Switch Users Guide ...
Page 183: ...Figure 92 LLDP Ports Settings 183 EX24000 Switch Users Guide ...
Page 193: ...Figure 95 GVRP 193 EX24000 Switch Users Guide ...
Page 198: ...Figure 98 GVRP Per Port Settings 198 EX24000 Switch Users Guide ...
Page 223: ...Figure 110 Daylight Savings Date Mode 223 EX24000 Switch Users Guide ...