Link: https://www.cisco.com/c/en/us/support/docs/lan-switching/unidirectional-link-detection-udld/217977-configure-the-udld-protocol-feature.html
Description: WebAug 17, 2023 · How Unidirectional Link Detection Protocol Works. UDLD is a Layer 2 (L2) protocol that works with the Layer 1 (L1) mechanisms to determine the physical status of a link. At Layer 1, auto-negotiation takes care of physical signaling and fault detection.
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Link: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12-2_52_se/configuration/guide/3560scg/swudld.pdf
Description: WebUDLD is a Layer 2 protocol that enables devices connected through fiber-optic or twisted-pair Ethernet cables to monitor the physical configuration of the cables and detect when a unidirectional link exists. All connected devices must support UDLD for the protocol to successfully identify and disable unidirectional links.
DA: 56 PA: 71 MOZ Rank: 100
Link: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/15-02SG/configuration/guide/config/udld.pdf
Description: WebUDLD is a Layer 2 protocol that initializes devices connected through fiber-optic or twisted-pair Ethernet cables. This protocol monitors a physical connection (such as wrong cabling) to detect unidirectional links to avoid spanning-tree topology loops or silent drop traffic.
DA: 20 PA: 86 MOZ Rank: 40
Link: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-0SY/configuration/guide/15_0_sy_swcg/udld.pdf
Description: Webdetected, UDLD shuts down the affected LAN port and alerts the user. Unidirectional links can cause a variety of problems, including spanning tree topology loops. UDLD is a Layer 2 protocol that works with the Laye r 1 protocols to determine the physical status of a link.
DA: 24 PA: 37 MOZ Rank: 60
Link: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/udld.pdf
Description: WebThe Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD. UDLD detects the existence of unidirectional links. When a unidirectional link is detected, UDLD puts the affected port into the errdisabled state and alerts the user.
DA: 29 PA: 94 MOZ Rank: 3
Link: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SXF/native/configuration/guide/swcg/udld.pdf
Description: WebUDLD is a Layer 2 protocol that works with the Layer 1 protocols to determine the physical status of a link. At Layer 1, autonegotiation takes care of physical signaling and fault detection. UDLD performs tasks that autonegotiation cannot perform, such as detecting the identities of neighbors and shutting down misconnected LAN ports.
DA: 60 PA: 3 MOZ Rank: 54
Link: https://content.cisco.com/chapter.sjs?uri=/searchable/chapter/www.cisco.com/content/en/us/td/docs/switches/lan/catalyst2950/software/release/12-1_11_yj4/configuration/guide/lrescg/swudld.html.xml
Description: WebUDLD is a Layer 2 protocol that enables devices connected through fiber-optic or twisted-pair Ethernet cables to monitor the physical configuration of the cables and detect when a unidirectional link exists. All connected devices must support UDLD for the protocol to successfully identify and disable unidirectional links.
DA: 32 PA: 56 MOZ Rank: 72
Link: https://content.cisco.com/chapter.sjs?uri=/searchable/chapter/www.cisco.com/content/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg/udld_on_asr1k.html.xml
Description: WebMar 28, 2013 · The Cisco-proprietary UDLD protocol allows the devices connected through fiber optic or copper (for example, Category 5 cabling) Ethernet cables that are connected to the LAN ports to monitor the physical configuration of the cables and detect whether a unidirectional link exists.
DA: 75 PA: 69 MOZ Rank: 24
Link: https://content.cisco.com/chapter.sjs?uri=%2Fsearchable%2Fchapter%2Fwww.cisco.com%2Fcontent%2Fen%2Fus%2Ftd%2Fdocs%2Fswitches%2Flan%2Fcatalyst4500%2F12-2%2F25ew%2Fconfiguration%2Fguide%2Fconf%2Fudld.html.xml
Description: WebConfigure. Published On: August 6ᵗʰ, 2019 02:05. Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide, 12.2 (25)EW. Configuring UDLD. This chapter describes how to configure the UniDirectional Link Detection (UDLD) and Unidirectional Ethernet on the Catalyst 4500 series switch.
DA: 52 PA: 95 MOZ Rank: 10
Link: https://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3.2_0_se/multibook/configuration_guide/b_consolidated_config_guide_3850_chapter_01000000.html
Description: WebAll connected devices must support UDLD for the protocol to successfully identify and disable unidirectional links. When UDLD detects a unidirectional link, it disables the affected port and alerts you. Unidirectional links can cause a variety of problems, including spanning-tree topology loops. Modes of Operation.
DA: 77 PA: 2 MOZ Rank: 66