Spanning tree with fast link-failure convergence
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 13, 2001
Grant Date -
N/A
app pub date -
Dec 31, 1997
filing date -
Dec 31, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The Spanning Tree Protocol converges to a new configuration after the loss of a link. A new frame, known as a root link query request BPDU is transmitted to the root bridge in the spanning tree when a bridge detects an indirect link failure through the reception of an inferior BPDU on a blocked port. Each bridge forwards this root link query until the root link query reaches the last reachable upstream bridge or a bridge which has a different Tx_Root_Id than the one identified in the RLQ-REQ-BPDU. If the last reachable bridge is the root bridge identified in the RLQ-REQ-BPDU, then a second new frame known as an RLQ-ACK-BPDU is sent, and the bridge port receiving this acknowledgment BPDU is changed from a blocked port to a designated port. If the RLQ-REQ-BPDU reaches a bridge with a different Tx_Root_Id than the one in RLQ-REQ-BPDU, a third new frame known as RLQ-NAK-BPDU is sent.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully