I am interested to know how many people use NetWare Core Protocol (NCP) over TCP. Like Howard, I didn't think this was the normal way of handling a migration from IPX to IP, although it certainly makes sense.
So, a survey: can people on the list let us know if they use this? Note: I'm not criticizing Kevin, just gathering information. Regarding PEP, I did some research too. I couldn't find any proof that the transport-like part of NCP was based on PEP, which I thought disappeared, but it does make sense. The service provided by PEP is essentially the same as the service that NCP provides in its "integrated transport" level, to use Howard's great terminology. I would love to get a Sniffer trace of NCP over TCP. I have a rather old version of Sniffer but a brand new version of EtherPeek. Also I know NCP really well so I might recognize some stuff even if the decoder doesn't. The packet you sent before is just the TCP SYN. Do you have something later in the session with some NCP data? Could you send me (not the list) an attachment of a cleaned up trace file? I'll acknowledge you in my new book! ;-) THANKS. Priscilla At 12:26 AM 11/13/01, [EMAIL PROTECTED] wrote: >5.0 with an unmanageably large number of service pack applications. > >I believe the NWIP encapsulation as a preferred means of exchanging packets >idea was buried with version 4. NW 5 servers may be installed with support >for either or both protocol stacks. > >There exist various modules centering around the acronym cmd which >allegedly facilitate hybrid environments slated to migrate to ip only. It's >possible that servers thus configured encapsulate ipx within ip, but I'm >far too undermotivated to ascertain the validity of that guess. > >I suppose that Novell has been fairly successful at obscuring the original >meaning of PEP: many hits on general web searches turn up some documents on >programmatically generating & sending ipx packets in the name of fine-tuing >network diagnostic tools such as DOOM. Seaching Novell leads you to >conclude that it refers to their Professional Education Program. > > > > > >"Howard C. Berkowitz" @groupstudy.com on 11/12/2001 06:22:40 >PM > >Please respond to "Howard C. Berkowitz" > >Sent by: [EMAIL PROTECTED] > >To: [EMAIL PROTECTED] >cc: (bcc: Kevin Cullimore) >Subject: RE: What frame format used by TCP/IP? [7:25924] > > > >In contrast to the IPX-based implementation described below, packet > >captures seem to reveal that NCP DOES rely on a transport layer when using > >IP as a network layer mechanism. > >What version of NetWare? It's my understanding that 5.x is native >TCP/IP with encapsulated IPX available for backwards compatibility. > >Incidentally, older IPX-based NCP had an integrated transport >function, not SPX but something called PEP. > > > > > Flags: 0x00 > > Status: 0x00 > > Packet Length:66 > > Timestamp: 19:09:38.677828 03/12/2001 > >Ethernet Header > > Destination: 00:90:7F:0F:0B:D5 > > Source: 00:10:A4:F5:5A:66 > > Protocol Type:0x0800 IP > >IP Header - Internet Protocol Datagram > > Version: 4 > > Header Length: 5 (20 bytes) > > Precedence: 0 > > Type of Service: %0000 > > Unused: %0 > > Total Length: 48 > > Identifier: 14671 > > Fragmentation Flags: %010 Do Not Fragment > > Fragment Offset: 0 (0 bytes) > > Time To Live: 128 > > IP Type: 0x06 TCP > > Header Checksum: 0xF3B3 > > Source IP Address: 210.225.86.53 > > Dest. IP Address: xxx.xxx.xxx.x xxx.xx.xxxxxx.xxx > > No Internet Datagram Options > >TCP - Transport Control Protocol > > Source Port: 2583 > > Destination Port: 524 NCP > > Sequence Number: 1273813107 > > Ack Number: 0 > > Offset: 7 > > Reserved: %000000 > > Code: %000010 > > Synch Sequence > > Window: 16384 > > Checksum: 0x44D7 > > Urgent Pointer: 0 > > TCP Options: > > Option Type: 2 Maximum Segment Size > > Length: 4 > > MSS: 1460 > > Option Type: 1 No Operation > > Option Type: 1 No Operation > > Option Type: 4 > > Length: 2 > > Opt Value: > > TCP Data Area: No more data. > >Frame Check Sequence: 0x04007C00 > > > > ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=26131&t=26131 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
