Path: utzoo!yunexus!eriks From: eriks@yunexus.yorku.ca (Eriks Rugelis) Newsgroups: comp.dcom.lans Subject: Re: Performance problems with a DESPR Message-ID: Date: 28 Mar 89 03:27:45 GMT Article-I.D.: yunexus.ERIKS.89Mar27222745 References: <1349@ndmath.UUCP> Sender: news@yunexus.UUCP Organization: York University Lines: 27 In-reply-to: eggers@ndmath.UUCP's message of 27 Mar 89 17:00:40 GMT >I have the following configuration set up, which seems to be 'legal' >according to DEC's Network and Communications Buyer's Guide. 'seems to be legal'?... I haven't seen a recent copy of the N&CBG but I would be surprised if DEC allowed you to plug a DESPR into a DELNI why? well because the DESPR is a repeater and a DEC supplied DELNI operating in 'local' mode generates heartbeat and repeaters cannot tolerate heartbeat; a repeater operating in the presence of heartbeat will see excessive collisions and will have the poor performance behaviour that you describe solution? replace the DELNI with a similar box not made by DEC that allows you to select/deselect heartbeat (i.e. I use Cabletron's MT-800's)... I have installed and running many instances of repeaters plugged into multi-port transceivers so it is demonstrably workable Eriks --- Voice: Eriks Rugelis E-Mail: eriks@libra.yorku.ca Ma Bell: 416/736-5257 x.2688 UUCP: yunexus!eriks Last resort: eriks@yulibra.NETNORTH Snail: York University, 4700 Keele St., North York, Ontario, Canada. M3J 1P3 Disclaimer: I have no interest in Cabletron outside of being a satisfied customer. -- Voice: Eriks Rugelis E-Mail: eriks@libra.yorku.ca Ma Bell: 416/736-5257 x.2688 UUCP: yunexus!eriks Last resort: eriks@yulibra.NETNORTH Snail: York University, 4700 Keele St., North York, Ontario, Canada. M3J 1P3