Re: Linuc cifs over UDP
Steve French <[email protected]>
| Newsgroups | gmane.linux.file-systems.cifs |
|---|---|
| Message-ID | <[email protected]> |
On Thu, Mar 4, 2010 at 7:53 AM, Jaspal wrote: > Hello, > > Is it possible to mount netapp cifs share over UDP? > > No. The SMB/CIFS protocol requires a reliable transport with guaranteed delivery (e.g. TCP rather than UDP). Interestingly even with NFS which can run over UDP (because NFS uses an intermediate layer, SunRPC, which guarantes delivery, a layer which CIFS does not have or need) - NFS can lose data over UDP over 100Mb and faster networks. I am not aware of any SMB/CIFS client being able to mount over transport protocols other than the following: 1) By far the most common: TCP/IP (RFC1001 specifies the 4 byte header with simple frame length field used when over TCP/IP) 2) Netbios frames protocol (the original default used many, many years ago) 3) IPX/SPX In theory, CIFS kernel library could be modified to use any kernel tcp-like socket based interface (e.g. it was easy to experiment and show that cifs could use SCTP, since SCTP can export an emulated socket interface), but using UDP would require a way (intermediate layer) to guarantee delivery and retry. -- Thanks, Steve _______________________________________________ linux-cifs-client mailing list [email protected] https://lists.samba.org/mailman/listinfo/linux-cifs-client