Skip Navigation Links
Exit Print View
| Sun Ethernet Fabric Operating System ### STP Administration Guide

Search Scope:

- This Document
- Entire Library

#### Rapid Convergence

RSTP relies on two new variables for achieve faster convergence than the legacy spanning tree algorithm.

- Edge port - Ports that are directly connected to end stations cannot create bridging loops, so these ports can rapidly transition to forwarding, which skips the learning and listening states. When the link toggles on an edge port, the topology change is not triggered. When a BPDU is received on an edge port, the BPDU loses its edge port status and becomes a normal spanning tree port. SEFOS RSTP uses the `portfast` keyword to configure edge ports.

- Link types - RSTP can achieve rapid transition on point-to-point links. The link type is automatically derived from the duplex mode of a port. A port operating in full-duplex mode is assumed to be point-to-point, while a half-duplex port is considered to be a shared port, by default. You can override this automatic link type setting by changing the configuration settings.

Copyright © 2010, 2012, Oracle and/or its affiliates. All rights reserved. Legal Notices |