Configuring Global Settings - Enterasys Matrix-V V2H124-24 Configuration Manual

CLI – This command displays global STA settings, followed by settings for each
port.
Console#show spanning-tree
Spanning-tree information
---------------------------------------------------------------
Spanning tree mode
Spanning tree enable/disable
Instance
Vlans configuration
Priority
Bridge Hello Time (sec.)
Bridge Max Age (sec.)
Bridge Forward Delay (sec.)
Root Hello Time (sec.)
Root Max Age (sec.)
Root Forward Delay (sec.)
Max hops
Remaining hops
Designated Root
Current root port
Current root cost
Number of topology changes
Last topology changes time (sec.):13380
Transmission limit
Path Cost Method
...
Note: The current root port and current root cost display as zero when this device is not
connected to the network.

Configuring Global Settings

Global settings apply to the entire switch.
Command Usage
• Spanning Tree Protocol
Uses RSTP for the internal state machine, but sends only 802.1D BPDUs. This
creates one spanning tree instance for the entire network. If multiple VLANs are
implemented on a network, the path between specific VLAN members may be
inadvertently disabled to prevent network loops, thus isolating group members.
When operating multiple VLANs, we recommend selecting the MSTP option.
• Rapid Spanning Tree Protocol
RSTP supports connections to either STP or RSTP nodes by monitoring the
incoming protocol messages and dynamically adjusting the type of protocol
messages the RSTP node transmits, as described below:
- STP Mode – If the switch receives an 802.1D BPDU (i.e., STP BPDU) after a
port's migration delay timer expires, the switch assumes it is connected to an
802.1D bridge and starts using only 802.1D BPDUs.
- RSTP Mode – If RSTP is using 802.1D BPDUs on a port and receives an RSTP
BPDU after the migration delay expires, RSTP restarts the migration delay timer
and begins using RSTP BPDUs on that port.
Spanning Tree Algorithm Configuration
:MSTP
:enable
:0
:1-4094
:32768
:2
:20
:15
:2
:20
:15
:20
:20
:32768.0.0000ABCD0000
:1
:200000
:1
:3
:long
3
4-196
3-127