exactly match minion in list

My nodegroup:
<pre>
nodegroups:
  bug: L@192.168.1.172,192.168.1.173
</pre>


run cmd with the "bug" group, and i have a minion with name "192.168.1.17", will like this:
<pre>
[root@salt-master salt]# salt -N bug cmd.run 'uptime' -v
Executing job with jid 20140209210600669692
-------------------------------------------
192.168.1.172:
     21:06:01 up 87 days,  5:55,  0 users,  load average: 0.00, 0.00, 0.00
192.168.1.173:
     21:06:01 up 120 days,  4:59,  0 users,  load average: 0.03, 0.03, 0.00
192.168.1.17:  (should not be here)
    Minion did not return
</pre>