Supermicro SSE-G2252, User Manual

Page: 1012 / 1401

Chapter 34: Spanning Tree Commands
– 1025 –
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
This command sets the maximum time (in seconds) a device can wait
without receiving a configuration message before attempting to
reconverge. All device ports (except for designated ports) should receive
configuration messages at regular intervals. Any port that ages out STA
information (provided in the last configuration message) becomes the
designated port for the attached LAN. If it is a root port, a new root port is
selected from among the device ports attached to the network.
E
XAMPLE
Console(config)#spanning-tree max-age 40
Console(config)#
R
ELATED
C
OMMANDS
spanning-tree forward-time (1023)
spanning-tree hello-time (1024)
spanning-tree mode
This command selects the spanning tree mode for this switch. Use the no
form to restore the default.
S
YNTAX
spanning-tree mode { stp | rstp
|
mstp }
no spanning-tree mode
stp - Spanning Tree Protocol (IEEE 802.1D)
rstp - Rapid Spanning Tree Protocol (IEEE 802.1w)
mstp - Multiple Spanning Tree (IEEE 802.1s)
D
EFAULT
S
ETTING
rstp
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
•
Spanning Tree Protocol
This option uses RSTP set to STP forced compatibility mode. It 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