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input output packets are not showing in VLAN

Hi,

Input and output packet are not showing in VLAN 41 of Cisco WS-C4510R-E (MPC8548)Switch, IOS cat4500e-entservicesk9-mz.122-52.SG.bin. However the nodes connected via VLAN 41 are able to communicate with others nodes in VLAN 41. Below is the VLAN status. Attached is the Tech-Support.

Fourth_Flr_User_Switch#sh int vlan 41
Vlan41 is up, line protocol is up
Hardware is Ethernet SVI, address is 0025.8466.427f (bia 0025.8466.427f)
Internet address is 172.20.41.3/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
  reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not supported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 01:09:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
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

L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
L3 out Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
  0 packets input, 0 bytes, 0 no buffer
  Received 0 broadcasts (1334 IP multicasts)
  0 runts, 0 giants, 0 throttles
  0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
  340 packets output, 15942 bytes, 0 underruns
  0 output errors, 0 interface resets
  0 output buffer failures, 0 output buffers swapped out
Fourth_Flr_User_Switch#


1 REPLY

Re: input output packets are not showing in VLAN

 However the nodes 
connected via VLAN 41 are able to communicate with others nodes in VLAN 
41

The device are connected in the same switch and are in the same vlan (41) ?

Then it's normal that you don't see any traffic. You are checking a L3 interface there, but if the devices are in the same vlan they are switching the packets in the L2, so the packets are not travelling through SVI interface.

You can even have not interface VLAN41 and the devices in the same vlan will be able to communicate to each other.

Only packets from devices in VLAN41 to and from any other VLAN will be seen into the statistics of SVI interface.

Let me know if this helps.

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