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Configuring Switching
16
SonicOS 5.7: Advanced Switching Feature Guide and Screencast Tutorial
Figure 9 illustrates the possible loop that is logically blocked when ports in the same VLAN exist on multiple
connected switches in a network.
Figure 9 RSTP on VLAN Trunk Ports Detects and Blocks Loops Between Switches
You can view the port settings for RSTP-eligible interfaces on the Switching > Rapid Spanning Tree page.
See Table 3 for an explanation of the port settings.
Table 3 Switching > Rapid Spanning Tree Port Settings
2400MX
Network Security Appliance
Switch
Sales
Eng
Switch
X
Eng
Sales
Loop
VLAN
Trunk
VLAN
Trunk
Logically Blocked
- with RSTP running
on NSA and Switches
Internet
Item Description
Configurable
from this Page
Name Indicates the interface number, such as X20. No
Type Indicates link status and speed. No
Cost Displays the port cost. This can be a configured value or an
automatically calculated value based on link speed.
Yes
Priority Displays the port priority. This defaults to the interface
number unless configured otherwise.
Yes
State Indicates whether the port is currently forwarding,
discarding, or blocking packets.
No
Role Indicates the role and status of the port, such as root,
designated, alternate, backup, or disabled.
No
Enabled Indicates whether or not RSTP (or STP) is enabled. Yes