diff options
| -rw-r--r-- | utils/mount/nfs.man | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man index e66daba..d92da19 100644 --- a/utils/mount/nfs.man +++ b/utils/mount/nfs.man @@ -411,11 +411,23 @@ Valid protocol types are and .IR tcp . .TP 1.5i -.I clientaddr=n -On a multi-homed client, this -causes the client to use a specific callback address when -communicating with an NFS version 4 server. -This option is currently ignored. +.I clientaddr=n.n.n.n +Specifies a single IPv4 address in dotted-quad form that +the NFS client advertises to allow servers to perform +NFSv4 callback requests against files on this mount point. +If the server is not able to establish callback connections +to clients, performance may degrade, or accesses to +files may temporarily hang. +.IP +If this option is not specified, the +.BR mount (8) +command attempts to discover an appropriate callback +address automatically. +The automatic discovery process is not perfect, however. +In the presence of multiple client network interfaces, special +routing policies, or atypical network topologies, the exact +address to use for callbacks may be nontrivial to determine, +and should be explicitly set using this mount option. .TP 1.5i .I sec=mode Same as \f3sec=mode\f1 for the nfs filesystem type (see above). |