Cisco 6509 - SolarWinds Orion reports high VLAN discards?

Posted on 2014-08-13
Last Modified: 2014-08-14
We use Solarwinds Orion, Network Performance monitor. Seems like a great tool. This morning is started reporting this:

"Interface - Vlan172 - Vl172 for node has a transmitted utilization of 91 which is greater than the threshold of 75%."

How would I begin to troubleshoot what the issue is?
Thanks Experts!
Question by:PapaSmurff

    Author Comment

    Status      Up      Up
           Name             Vlan172 - Vl172
           Index             209
           Interface Type      Proprietary Virtual      Proprietary Virtual
           MAC Address             0025.B447.FF00
           IP Address   
           Administrative Status      Up      Up
           Operational Status      Up      Up
           Last Status Change             2/24/2014 11:33 AM
                         Receive      Transmit
           Interface Bandwidth             1.0 Gbps       1.0 Gbps
           Current Traffic             19.022 Mbps       927.742 Mbps
           Percent Utilization             2 %       93 %
           Packets per Second             31555.0 pps       78359.0 pps
           Average Packet Size             75 bytes       1.5 kbytes
           MTU             1.5 kbytes
           Configured Interface Speed             1.0 Gbps
           Counter 64 Support             Yes

    Author Comment

    HCRHS_MDF_6509#show int vlan 172
    Vlan172 is up, line protocol is up
      Hardware is EtherSVI, address is 0025.b447.ff00 (bia 0025.b447.ff00)
      Internet address is
      MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
         reliability 255/255, txload 219/255, rxload 4/255
      Encapsulation ARPA, loopback not set
      Keepalive not supported
      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: 0/75/1998696212/1586986 (size/max/drops/flushes); Total output drops: 0
      Queueing strategy: fifo
      Output queue: 0/40 (size/max)
      5 minute input rate 19359000 bits/sec, 32028 packets/sec
      5 minute output rate 860444000 bits/sec, 72782 packets/sec
      L2 Switched: ucast: 127038672882 pkt, 15169767049924 bytes - mcast: 2139374056 pkt, 198737169629 bytes
      L3 in Switched: ucast: 138541996227 pkt, 31440704968554 bytes - mcast: 194998042 pkt, 31635883521 bytes mcast
      L3 out Switched: ucast: 237331408719 pkt, 239631682055799 bytes mcast: 43267190 pkt, 61257169563 bytes
         151951518504 packets input, 32690464500805 bytes, 0 no buffer
         Received 2022814185 broadcasts (220116510 IP multicasts)
         0 runts, 0 giants, 34247793 throttles
         0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
         238911445583 packets output, 239447218058184 bytes, 0 underruns
         0 output errors, 0 interface resets
         0 output buffer failures, 0 output buffers swapped out
    LVL 21

    Accepted Solution

    This message is not an error, it is simply reporting that 91% of the VLAN interface's bandwidth is being used up.  A Netflow collector would be the best tool to see what is using the bandwidth.  Your Solar Winds server may or may not have a Netflow tool already installed on it.  If not, there is one available on the Solar Winds free downloads page.

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