If anything, it has a lot to do with the fact that SNA is VERY time-critical.. it doesn't care how FAST a link is, but rather that it recieves its packets in a relatively predictable time period.. it doesn't like it to take 15ms for the first packet.. 33ms for the second.. 12ms for the third.. and 24ms for the fifth. Fluctuation an delay is DEADLY in an SNA environment. Since there is a set size of a ring, and a packet has to travel the ring regardless of whether there is a payload or not, delay fluctuates a lot less in a Token Ring environment. This is atleast my understanding between the logic behind using TR. If I am totally off base, feel free to correct me. Regards, Trevor Corness, CCNA MCSE MCP+I Network Systems Engineer, DataCom BMS Communications Ltd. http://www.bmscom.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Alldread AK2 Robert J Sent: Thursday, October 12, 2000 5:19 AM To: Cisco@Groupstudy. Com (E-mail) Subject: SNA: why tokenring? I am just curious as to why SNA still runs on tokenring today. Is there any reason that it cannot just hook right into an ethernet network?? I have read a few white papers on SNA, and I assume that because tokenring was the major LAN media back in the day, and because SNA uses RIF's to determine paths to other hosts, that SNA was built requiring the use of RIF's. Is this correct?? thanx, skin-e _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
BEGIN:VCARD VERSION:2.1 N:Corness;Trevor FN:Trevor Corness ORG:BMS Communications;DataCom TITLE:Network Systems Engineer TEL;PAGER;VOICE:604-631-7867 ADR;WORK:;;2880 Production Way;Burnaby;BC;V5A4T6;Canada LABEL;WORK;ENCODING=QUOTED-PRINTABLE:2880 Production Way=0D=0ABurnaby, BC V5A4T6=0D=0ACanada URL: URL:http://www.bmscom.com EMAIL;PREF;INTERNET:[EMAIL PROTECTED] REV:20000921T155409Z END:VCARD
