This write-up is from the Token Ring FAQ , by James Messer James@ with quite a few contributions by other people. If the station successfully participates in a ring poll, it proceeds into the final phase of insertion, request initialization. For all Token Ring cards except the CTR and access routers, you must use the clear interface command to reinitialize the Token Ring interface if the interface is down.
The supply receives the returned token, verifies copied and received information and empties the token. Each Token Ring card comes with a diagnostic disk that supplies testing for the adapter. In Figure Two we can see how Token Ring creates a logical ring network with a physical star.
Below situations of low load, substantial delay waiting for token to come about, even though network is idle. The token is passed around the ring until a pc wishing to send information and facts out onto the network requires possession of the token. Most usually, rather than direct connection from personal computer to computer system, you’d find a MAU in a central wiring closet and then run lines back to every single personal computer.
Other differences exist, which includes media sort (IEEE 802.5 does not specify a media kind, whereas IBM Token Ring networks use twisted-pair wire) and routing facts field size. In implementation, when the network is first constituted, a single unique node is given the responsibility for creating the token or slot.
On a LAN, this ordinarily indicates noise or transmission problems on the LAN interface or the LAN bus itself. One of these functions is the removal of continuously circulating frames from the ring. A token ring network is a neighborhood area network technology primarily based on a token-passing protocol for media access manage.
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