root@tsg-freebsd01:~ # uname -a
FreeBSD tsg-freebsd01.meyer.local 11.0-RELEASE FreeBSD 11.0-RELEASE #0 r306211: Thu Sep 22 23:43:22 UTC 2016 root@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC i386
root@tsg-freebsd01:~ # freebsd-version
11.0-RELEASE-p11
root@tsg-freebsd01:~ # freebsd-update upgrade -r 11.0-RELEASE-p10
Looking up update.FreeBSD.org mirrors... 4 mirrors found.
Fetching metadata signature for 11.0-RELEASE from update6.freebsd.org... done.
Fetching metadata index... done.
Inspecting system... done.
The following components of FreeBSD seem to be installed:
kernel/generic src/src world/base world/doc
The following components of FreeBSD do not seem to be installed:
kernel/generic-dbg world/base-dbg
Does this look reasonable (y/n)? y
Fetching metadata signature for 11.0-RELEASE-p10 from update6.freebsd.org... failed.
Fetching metadata signature for 11.0-RELEASE-p10 from update5.freebsd.org... failed.
Fetching metadata signature for 11.0-RELEASE-p10 from update4.freebsd.org... failed.
Fetching metadata signature for 11.0-RELEASE-p10 from update3.freebsd.org... failed.
No mirrors remaining, giving up.
root@tsg-freebsd01:~ #