Supermicro SuperBlade SBM-GEM-X2C+, User Manual

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Chapter 6: 1-Gb Ethernet Switch Firmware
RSTP Port Settings
These settings control and monitor the port-based spanning tree status.
• Participate – This specifies if the RSTP is enabled or not for the selected port.
• Cost – Displays the cost of this port. “Cost” means the contribution of this port to the
path cost of paths towards the spanning tree root which include this port.
• Priority – Displays the priority of this port. This is the value of the priority field
contained in the first octet of the Port ID.
• Edge – This indicates if this port is the edge port. Once configured as an edge port,
the port immediately transitions to the forwarding state. It is available only when the
port is directly connected to an end terminal (or a file server) that has no influence
on the spanning tree configuration. Since ports 11 to 24 are connected to blade
server NIC ports, all of those ports can be configured as an Edge port.
• P2P – This indicates if this port is a point-to-point link. If you connect a port to
another port though a point-to-point link and the local port becomes a designated
port, it negotiates a rapid transition with the other port to ensure a loop-free
topology.
• Status – This displays the RSTP port status.
• Role – This displays the role of this port.
To modify the P
ORT
S
ETTINGS
for each port, click on the E
DIT
link next to P
ORT
S
ETTING
.
The R
APID
S
PANNING
T
REE
- P
ORT
S
ETTINGS
screen ( Figure 6-19 ) will appear.
Select a group of port numbers that you want to configure. Setting the C
OST
to zero or
checking A
UTO
will automatically set the default value depending on the link speed. The
default cost is 20000 for a Gigabit port and is 100000 for a 100Mbps port.
Figure 6-19. Rapid Spanning Tree Port Settings