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The CIFS Standard - an Oxymoron?

The CIFS Standard - an Oxymoron?. Dennis Chapman Member Technical Staff Network Appliance d ec@netapp.com. CIFS a short hist ory. SMB/CIFS protocol evolution. Original dialect - MSNET SMB supported in MSDOS 3 11 dialects are currently defined Support semantics for DOS, WfW, OS/2 and NT

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The CIFS Standard - an Oxymoron?

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  1. The CIFS Standard - an Oxymoron? Dennis Chapman Member Technical Staff Network Appliance dec@netapp.com

  2. CIFSa shorthistory

  3. SMB/CIFS protocol evolution • Original dialect - MSNET SMB supported in MSDOS 3 • 11 dialects are currently defined • Support semantics for DOS, WfW, OS/2 and NT • Most are now obsolete • Clients & servers negotiate dialect upon connection • Most clients and servers now use NT LM 0.12

  4. SMB/CIFS specification evolution • Early versions were available from Microsoft • Protocols for X/Open PC Internetworking:SMB, Version 2 (1992) • IETF drafts (all expired) • draft-leach-cifs-v1-spec-00.txt (1997) • draft-leach-cifs-v1-spec-01.txt (1998) • Drafts for ancillary protocols (logon, print, remote access) (1997)

  5. Problems with the CIFS specs • Key components of the protocol are not defined in the spec • This requires either licensing technology or reverse engineering the protocol. • The specs lag behind client and server implementation • Single vendor determines the protocol for the rest of the industry

  6. Creating a better CIFS spec

  7. SNIA CIFSSPEC working group • First meeting in Feb ‘99 • Active workgroup members • Microsoft, IBM, Network Appliance, Veritas, HP, Crosstor and the Samba Group

  8. Work in progress • Specify current CIFS behavior • Base work on draft-leach 1 & MSDN versions • Incorporate CIFS mail alias questions/comments • Gather corrections/improvements from wg members

  9. Followed by • Specify undocumented CIFS behaviour • Management RPCs • Collect a suite of CIFS tests • Jointly discuss future CIFS enhancements

  10. Current status • Draft 1 was reviewed at CIFSSPEC WG meeting in Sept. • Next draft will be reviewed in Nov. • Next CIFS conference in Fall ‘01.

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