cwiener@crlabs.CRLABS.COM (Chris Wiener) (12/20/89)
Recently there has been mention of IBM's LAN Support package which includes token ring card device drivers. Would someone please post a part number which I can use to order it from IBM. I have 2 AT-bus IBM token ring cards and no software. Does anyone have performance figures for FTP Software's PC/TCP product with token ring support built-in versus token ring support obtained using the recently-posted packet driver. I am in the process of making just that decision. Chris Wiener Datatec Industries Englewood, NJ (800) 631-2524 Ext. 254 -- Christopher Wiener N2CR CR Labs, Fort Lee, NJ DOMAIN: cwiener@CRLABS.COM UCCP: ..!attctc!crlabs!cwiener
PMW1@PSUVM.BITNET (Peter Weiss) (12/20/89)
In article <1109@crlabs.CRLABS.COM>, cwiener@crlabs.CRLABS.COM (Chris Wiener) says: > >Recently there has been mention of IBM's LAN Support package which includes >token ring card device drivers. Would someone please post a part number which >I can use to order it from IBM. I have 2 AT-bus IBM token ring cards and >no software. Here is a list of the directory of The IBM LAN Support Program V1.1 (93X5683) (comes on 3.5" and 5.25" diskettes) - Directory of A:\ dxminfo doc 49,401 9-27-88 11:08a dxmaid com 32,431 9-27-88 11:08a dxmaid 001 19,705 9-27-88 11:09a dxmaid 049 21,377 9-27-88 11:09a dxmaid 045 18,956 9-27-88 11:09a biosdate exe 880 9-27-88 11:09a timerint sys 581 9-27-88 11:10a dxma0mod sys 2,816 9-27-88 11:10a dxmc0mod sys 16,384 9-27-88 11:10a dxmc1mod sys 24,064 9-27-88 11:10a dxmg0mod sys 28,032 9-27-88 11:11a dxmg1mod sys 29,696 9-27-88 11:11a dxmg2mod sys 36,591 9-27-88 11:12a dxmt0mod sys 28,544 9-27-88 11:13a 14 files found 415,744 bytes free ------- Peter M. Weiss | (this line intentionally left blank) 31 Shields Bldg (the AIS people) | Don't FAX me, I'll FAX you! University Park, PA 16802 | Disclaimer :1 * apllies herein
jbvb@VAX.FTP.COM (James Van Bokkelen) (12/21/89)
Date: 19 Dec 89 23:57:47 GMT From: Chris Wiener <pyrnj!bartal!crlabs!cwiener@rutgers.edu> .... Does anyone have performance figures for FTP Software's PC/TCP product with token ring support built-in versus token ring support obtained using the recently-posted packet driver.... If both were being used by the same TCP (e.g. our 2.04 ETHDRV kernel on the packet driver and our 2.04 IBMTR kernel going direct), I'd expect the direct to go at least 20% faster when talking to hosts on the local network. This is because the direct version can use a 1960-byte TCP max segment size (it knows it is on an 802.5 ring), while the other can only send 1460 bytes per packet (it thinks it is on an Ethernet, where the MTU is 1514 bytes instead of 2042). This wouldn't hold via a router, where the MTU is reduced, or when talkiing to 4bsd systems, which don't believe TCP segments can be bigger than 1024. The IBMTR kernel would also use more memory, because its default buffers are bigger. All bets are off if you aren't using the same TCP for each side of the test. By the way, we don't support the use of our ETHDRV kernel with the pseudo- Ethernet 802.5 packet driver. This is because the RIF-handling code in the packet driver will come into conflict with our Ethernet ARP module after having talked to some number of hosts; you'll get "It was working fine, but then I couldn't open a telnet session to foo.edu. I could still talk to bar.com..." James B. VanBokkelen 26 Princess St., Wakefield, MA 01880 FTP Software Inc. voice: (617) 246-0900 fax: (617) 246-0901