Is ulimit -b in ksh supported on Red Hat Enterprise Linux?

Issue

Is setting the socket buffer size through ksh supported on Red Hat Enterprise Linux?

$ ulimit -a 
address space limit (kbytes)   (-M)  unlimited
core file size (blocks)        (-c)  4194304
cpu time (seconds)             (-t)  unlimited
data size (kbytes)             (-d)  unlimited
file size (blocks)             (-f)  unlimited
locks                          (-L)  unlimited
locked address space (kbytes)  (-l)  32
nofile                         (-n)  8192
nproc                          (-u)  532479
pipe buffer size (bytes)       (-p)  4096
resident set size (kbytes)     (-m)  unlimited
socket buffer size (bytes)     (-b)  4096
stack size (kbytes)            (-s)  10240
threads                        (-T)  not supported
process size (kbytes)          (-v)  unlimited