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- Path: sparky!uunet!spool.mu.edu!hri.com!noc.near.net!vaxeline.ftp.com!cream.ftp.com!jbvb
- From: jbvb@vax.ftp.com (James B. VanBokkelen)
- Newsgroups: comp.protocols.tcp-ip
- Subject: Re: Software release problem?
- Keywords: PC/TCP hardware drivers
- Message-ID: <930104123246@cream.ftp.com>
- Date: 4 Jan 93 17:32:46 GMT
- References: <1huab3INNs4t@vttux1.vtt.fi>
- Sender: root@vaxeline.ftp.com (vaxeline.ftp.com root account)
- Reply-To: jbvb@ftp.com
- Organization: FTP Software, Inc., Wakefield, MA
- Lines: 33
- Nntp-Software: PC/TCP NNTP
- Nntp-Posting-Host: whipped-cream.ftp.com
-
- In article <1huab3INNs4t@vttux1.vtt.fi> leino@rat.vtt.fi (Tapio Leino) writes:
-
- a) If the TCP/IP-software in my PC is the Wollongong WINTCP for DOS
- there is no trouble in connecting the PC (with telnet) to the 4D/20G
- type IRIS with the older IRIX 3.3.1 operating system,
- but it cannot be connected to the other IRIS (with IRIS 4.0.5)?
-
- b) If I am using a product called PCTCP instead of the WINTCP I can
- connect to both IRIS workstations with no trouble.
-
- This started when we took the newest release 4.0.5 of IRIX! Before that I
- could connect the PC to both workstations with WINTCP.
-
- We have checked what happens on the lines. The messages seem to go to the
- IRIS quite OK but the messages it sends to the PC are not understood by
- the WINTCP and everything just stops.
-
- It isn't really clear from this what the problem is: Does ARP fail (you
- should be able to check the cache on both ends), or is it that ARP works
- but TCP can't make a connection? Or is the problem that the TCP connection
- opens but you never get a Telnet prompt?
-
- If ARP fails, then the issue may be in the PC's hardware driver - you don't
- say which network interface you're using, but the TWG driver may not go to
- as much effort to salvage packets in the face of board errors.
-
- If TCP won't connect, examine the packets and refer to RFC 793.
-
- If Telnet never gets a prompt, the issue might be in Telnet option
- negotiation. Check the Assigned Numbers RFC for the names of the options
- that Irix is asking for, and check how the PC responds to each.
-
- James B. VanBokkelen 2 High St., North Andover, MA 01845
- FTP Software Inc. voice: (508) 685-4000 fax: (508) 794-4488
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