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New Member

trafic on vlan

please how to see trafic on a vlan.when i try show interface vlan i can't see trafic.

3550-Dla#show int vlan 11

Vlan11 is up, line protocol is up

Hardware is EtherSVI, address is 0012.43d4.bf80 (bia 0012.43d4.bf80)

Internet address is

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 00:09:07, output 00:00:24, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 315

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

228052 packets input, 16883793 bytes, 0 no buffer

Received 0 broadcasts (0 IP multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

250875 packets output, 16883860 bytes, 0 underruns

0 output errors, 0 interface resets

0 output buffer failures, 0 output buffers swapped out


Please need a help.

New Member

Re: trafic on vlan

If you really want a visual into your network, set up a SPAN and use a network analyzer...there are a few free ones out there for Windows, OmniPeek Personal and Wireshark etc...tcpdump.

Note; switches generally don't foward VLAN tags on a SPAN setup, you'd have to set up a tap to capture frames with tags -and ensure your network card driver does not strip the tags, many do.