Hi.
Yes you can do that.
First you can use the standard 'sh interface' command to get interface statistics specific to VLAN interfaces.
c3550#sh int vlan 1
Vlan1 is up, line protocol is up
Hardware is EtherSVI, address is 000c.30f1.2f80 (bia 000c.30f1.2f80)
Internet address is 10.4.0.6/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
4967 packets input, 369163 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
1153 packets output, 371732 bytes, 0 underruns
0 output errors, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
c3550#
And your second option if you are using an SNMP monitoring software like MRTG, SNMPc, etc. is to get
the In/Out values polling the VLAN OIDs. In this case I polled the VLAN 1 interface of the Catalyst 3550
[root@localhost root]# snmpget -c public -v1 10.4.0.6 .1.3.6.1.2.1.2.2.1.10.28
IF-MIB::ifInOctets.28 = Counter32: 369655
[root@localhost root]# snmpget -c public -v1 10.4.0.6 .1.3.6.1.2.1.2.2.1.16.28
IF-MIB::ifOutOctets.28 = Counter32: 372883
Regards.
