Linksys SRW2016 - Manual (Page 100)

90 Chapter 5: Using the Web-based Utility for Configuration
Spanning Tree Tab on SRW2048 Switches - RSTP Interface Settings
WebView Switches
Spanning Tree Tab on SRW2048 Switches - RSTP Interface Settings
While the classic spanning tree prevents Layer 2 forwarding loops on a general network topology, convergence
can take 30-60 seconds. The delay allows time to detect possible loops, and propagate status changes.
The RSTP Interface Settings screen contains the following fields:
Interface. Port or LAG for which you can view and edit RSTP settings.
Role. Indicates the port role assigned by the STP algorithm in order to provide STP paths. The possible field
values are:
Root-Provides the lowest cost path to forward packets to root switch.
Designated-Indicates that the port or LAG via which the designated switch is attached to the LAN.
Alternate-Provides an alternate path to the root switch from the root interface.
Backup-Provides a backup path to the designated port path toward the Spanning Tree leaves. Backup ports
occur only when two ports are connected in a loop by a point-to-point link. Backup ports also occur when a
LAN has two or more connections connected to a shared segment.
Disabled-Indicates the port is not participating in the Spanning Tree.
Mode. Indicates the current Spanning Tree mode. The Spanning Tree mode is selected in the Spanning Tree
Global Settings screen. The possible field values are:
Classic STP-Indicates that Classic STP is enabled.
Rapid STP-Indicates that Rapid STP is enabled.
Multiple STP-Indicates that Multiple STP is enabled.
Fast Link Operational Status. Indicates if Fast Link is enabled or disabled for the port or LAG. If Fast Link is
enabled for an interface, the interface is automatically placed in the forwarding state.
Point-to-Point Admin Status. Enables or disables the Switch to establish a point-to-point link, or specifies for
the device to automatically establish a point-to-point link.
To establish communications over a point-to-point link, the originating PPP first sends Link Control Protocol (LCP)
packets to configure and test the data link. After a link is established and optional facilities are negotiated as
needed by the LCP, the originating PPP sends Network Control Protocols (NCP) packets to select and configure
Figure 5-88: Spanning Tree - RSTP Interface Settings
NOTE: Rapid STP is available on the
SRW2048 Switches ONLY.