Displays the peer reachability status. An 8-bit number that shows
whether or not the peer server responded to the last eight requests to
the server to which it has association; one indicates a response, zero
indicates no response. Count from rightmost to leftmost as latest to
later requests as reachability states.
For example, 0b11111111 indicates that the peer server responded to the
last eight requests. If the system client reaches one peer server less
often than it does other peer servers, that server is not a good choice
for the master