You can configure the collection of statistics over any port.
SEFOS# configure terminal
SEFOS(config)# interface extreme-ethernet 0/15
SEFOS(config-if)# rmon collection stats 1 owner myTest SEFOS(config-if)# exit SEFOS(config)# exit
SEFOS# show rmon statistics 1 RMON is enabled Collection 1 on EX0/15 is active, and owned by myTest, Monitors ifEntry.1.15 which has Received 1556 octets, 16 packets, 1 broadcast and 0 multicast packets, 0 undersized and 0 oversized packets, 0 fragments and 0 jabbers, 0 CRC alignment errors and 0 collisions. # of packets received of length (in octets): 64: 2, 65-127: 14, 128-255: 0, 256-511: 0, 512-1023: 0, 1024-1518: 0