The last line in the mongostat output always shows the port on the host even if the port is unspecified in the -h parameter.
03/01/12 17:14:03 david@mia-mtx-web2 ~: mongostat -h mia-mtx-md1a,mia-mtx-md2a,mia-mtx-md3a insert query update delete getmore command flushes mapped vsize res faults locked % idx miss % qr|qw ar|aw netIn netOut conn set repl time mia-mtx-md1a 126 1 456 0 0 20 0 26.1g 53g 3.15g 0 22.5 0 0|0 0|0 427k 18k 241 mtx1 M 17:14:06 mia-mtx-md2a 149 0 470 0 0 2 0 28.1g 57g 3.95g 0 23.7 0 0|0 0|2 526k 1k 228 mtx2 M 17:14:06 mia-mtx-md3a:27017 134 0 304 0 0 10 0 26.1g 53g 3.57g 0 16 0 0|0 0|0 404k 5k 219 mtx3 M 17:14:06 mia-mtx-md1a 50 2 396 0 0 10 0 26.1g 53g 3.14g 0 16.6 0 0|0 0|0 354k 13k 241 mtx1 M 17:14:07 mia-mtx-md2a 172 0 461 0 0 12 0 28.1g 57g 3.95g 0 17.7 0 0|0 0|0 375k 6k 228 mtx2 M 17:14:07 mia-mtx-md3a:27017 154 0 274 0 1 10 0 26.1g 53g 3.56g 1 12.3 0 0|0 0|0 288k 5k 219 mtx3 M 17:14:07
03/01/12 17:14:08 david@mia-mtx-web2 ~: mongostat -h mia-mtx-md1a,ncr-mtx-md1b,mia-mtx-md2a,ncr-mtx-md2b,mia-mtx-md3a,ncr-mtx-md3b insert query update delete getmore command flushes mapped vsize res faults locked % idx miss % qr|qw ar|aw netIn netOut conn set repl time mia-mtx-md1a 151 1 682 0 0 29 0 26.1g 53g 3.19g 0 33.2 0 0|0 0|0 661k 14k 241 mtx1 M 17:14:54 mia-mtx-md2a 223 0 673 0 0 29 0 28.1g 57g 4.01g 0 31.4 0 0|0 0|1 759k 22k 228 mtx2 M 17:14:54 mia-mtx-md3a 365 0 889 0 0 37 0 26.1g 53g 3.59g 2 42.3 0 0|0 0|2 963k 12k 218 mtx3 M 17:14:54 ncr-mtx-md1b *0 *0 *0 *0 0 2|0 0 24.1g 48.8g 2.91g 0 0 0 0|0 0|0 189b 1k 15 mtx1 SEC 17:14:54 ncr-mtx-md2b no data ncr-mtx-md3b:27017 *0 *0 *0 *0 0 1|0 0 26.1g 52.7g 3.11g 0 0 0 0|0 0|0 62b 1k 15 mtx3 SEC 17:14:54 mia-mtx-md1a 43 2 344 0 0 2 0 26.1g 53g 3.18g 0 14.5 0 0|0 0|0 294k 4m 241 mtx1 M 17:14:55 mia-mtx-md2a 103 0 257 0 0 2 0 28.1g 57g 4g 0 9.7 0 0|0 0|0 223k 1k 228 mtx2 M 17:14:55 mia-mtx-md3a 188 0 410 0 0 15 0 26.1g 53g 3.58g 0 17.5 0 0|0 0|0 437k 4m 218 mtx3 M 17:14:55 ncr-mtx-md1b *0 *0 *0 *0 0 9|0 0 24.1g 48.8g 2.93g 0 0 0 0|0 0|0 651b 5k 15 mtx1 SEC 17:14:55 ncr-mtx-md2b *0 1 *0 *0 0 2|0 0 24.1g 48.9g 2.39g 0 0 0 0|0 0|0 231b 2k 15 mtx2 SEC 17:14:55 ncr-mtx-md3b:27017 *97 *0 *213 *0 0 3|0 0 26.1g 52.7g 3.11g 0 5.9 0 0|0 0|0 317b 1k 15 mtx3 SEC 17:14:55