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- Bidirectional_Forwarding_Detection abstract "Bidirectional Forwarding Detection (BFD) is a network protocol used to detect faults between two forwarding engines connected by a link. It provides low-overhead detection of faults even on physical media that don't support failure detection of any kind, such as Ethernet, virtual circuits, tunnels and MPLS Label Switched Paths.BFD establishes a session between two endpoints over a particular link. If more than one link exists between two systems, multiple BFD sessions may be established to monitor each one of them. The session is established with a three-way handshake, and is torn down the same way. Authentication may be enabled on the session. A choice of simple password, MD5 or SHA1 authentication is available.BFD does not have a discovery mechanism; sessions must be explicitly configured between endpoints. BFD may be used on many different underlying transport mechanisms and layers, and operates independently of all of these. Therefore, it needs to be encapsulated by whatever transport it uses. For example, monitoring MPLS LSPs involves piggybacking session establishment on LSP-Ping packets. Protocols that support some form of adjacency setup, such as OSPF or IS-IS, may also be used to bootstrap a BFD session. These protocols may then use BFD to receive faster notification of failing links than would normally be possible using the protocol's own keepalive mechanism.A session may operate in one of two modes: asynchronous mode and demand mode. In asynchronous mode, both endpoints periodically send Hello packets to each other. If a number of those packets are not received, the session is considered down.In demand mode, no Hello packets are exchanged after the session is established; it is assumed that the endpoints have another way to verify connectivity to each other, perhaps on the underlying physical layer. However, either host may still send Hello packets if needed.Regardless of which mode is in use, either endpoint may also initiate an Echo function. When this function is active, a stream of Echo packets is sent, and the other endpoint then sends these back to the sender via its forwarding plane. This is used to test the forwarding path on the remote system.".
- Bidirectional_Forwarding_Detection wikiPageExternalLink bfd-charter.html.
- Bidirectional_Forwarding_Detection wikiPageExternalLink 23380.
- Bidirectional_Forwarding_Detection wikiPageExternalLink ripe48-eof-bfd.pdf.
- Bidirectional_Forwarding_Detection wikiPageID "1971595".
- Bidirectional_Forwarding_Detection wikiPageRevisionID "582584576".
- Bidirectional_Forwarding_Detection hasPhotoCollection Bidirectional_Forwarding_Detection.
- Bidirectional_Forwarding_Detection subject Category:Internet_Standards.
- Bidirectional_Forwarding_Detection subject Category:Internet_protocols.
- Bidirectional_Forwarding_Detection subject Category:Network_management.
- Bidirectional_Forwarding_Detection type Abstraction100002137.
- Bidirectional_Forwarding_Detection type Communication100033020.
- Bidirectional_Forwarding_Detection type Direction106786629.
- Bidirectional_Forwarding_Detection type InternetProtocols.
- Bidirectional_Forwarding_Detection type InternetStandards.
- Bidirectional_Forwarding_Detection type Measure100033615.
- Bidirectional_Forwarding_Detection type Message106598915.
- Bidirectional_Forwarding_Detection type Protocol106665108.
- Bidirectional_Forwarding_Detection type Rule106652242.
- Bidirectional_Forwarding_Detection type Standard107260623.
- Bidirectional_Forwarding_Detection type SystemOfMeasurement113577171.
- Bidirectional_Forwarding_Detection comment "Bidirectional Forwarding Detection (BFD) is a network protocol used to detect faults between two forwarding engines connected by a link. It provides low-overhead detection of faults even on physical media that don't support failure detection of any kind, such as Ethernet, virtual circuits, tunnels and MPLS Label Switched Paths.BFD establishes a session between two endpoints over a particular link.".
- Bidirectional_Forwarding_Detection label "Bidirectional Forwarding Detection".
- Bidirectional_Forwarding_Detection label "Bidirectional Forwarding Detection".
- Bidirectional_Forwarding_Detection label "雙向轉發偵測".
- Bidirectional_Forwarding_Detection sameAs Bidirectional_Forwarding_Detection.
- Bidirectional_Forwarding_Detection sameAs m.069_2p.
- Bidirectional_Forwarding_Detection sameAs Q4904183.
- Bidirectional_Forwarding_Detection sameAs Q4904183.
- Bidirectional_Forwarding_Detection sameAs Bidirectional_Forwarding_Detection.
- Bidirectional_Forwarding_Detection wasDerivedFrom Bidirectional_Forwarding_Detection?oldid=582584576.
- Bidirectional_Forwarding_Detection isPrimaryTopicOf Bidirectional_Forwarding_Detection.