Content deleted Content added
Citation bot (talk | contribs) Removed parameters. | Use this bot. Report bugs. | Suggested by Abductive | Category:Articles needing additional references from January 2008 | #UCB_Category 301/952 |
|||
| (2 intermediate revisions by 2 users not shown) | |||
Line 2:
{{More citations needed|date=January 2008}}
'''Unidirectional Link Detection''' ('''UDLD''') is a [[data link layer]] protocol from [[Cisco Systems]] to monitor the physical configuration of
:* Unidirectional Link Detection (UDLD) is one of two major features (UDLD and loop guard) in Cisco Switches to prevent Layer 2 loops.
:* Spanning-Tree Protocol (STP) resolves redundant physical topology into a loop-free, tree-like forwarding topology via blocking one or more ports.
Line 16:
UDLD is a Cisco-proprietary protocol but HP, [[Extreme Networks]], and [[Avaya|AVAYA]] all have a similar feature calling it by a different name. HP calls theirs Device Link Detection Protocol (DLDP). Extreme Networks call it Extreme Link Status Monitoring (ELSM) and AVAYA calls theirs, Link-state Tracking. [[Brocade_Communications_Systems|Brocade]]/[[Ruckus Networks]] ICX Switches offer this feature as Uni-Directional Link Detection(UDLD).
Similar functionality in a standardized form is provided as part of the [[Ethernet]] [[OA&M|OAM]] protocol that is defined as part of the [[Ethernet in the
The use of UDLD over 10GbE is augmented, as per 802.3ae/D3.2 standard, when a fault is detected in the physical link:
Line 25:
==External links==
* [http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a008009477b.shtml Understanding and Configuring the Unidirectional Link Detection Protocol Feature] at [[Cisco Systems]]
* {{cite web |url=https://www.iol.unh.edu/sites/default/files/knowledgebase/10gec/10GbE_fault_signaling.
*http://docs.ruckuswireless.com/fastiron/08.0.30/fastiron-08030-l2guide/GUID-CE29A0CF-07A6-40C3-A999-9AF5FB8AC020.html
| |||