Cisco 6509 - SolarWinds Orion reports high VLAN discards?

We use Solarwinds Orion, Network Performance monitor. Seems like a great tool. This morning is started reporting this:

"Interface HCRHS_MDF_6509.hcrhs.k12.nj.us - Vlan172 - Vl172 for node HCRHS_MDF_6509.hcrhs.k12.nj.us 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!
PapaSmurffAsked:
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PapaSmurffAuthor Commented:
Status      Up      Up
       Name             Vlan172 - Vl172
       Alias              
       Index             209
       Interface Type      Proprietary Virtual      Proprietary Virtual
       MAC Address             0025.B447.FF00
       IP Address             172.16.0.1
 
       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
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PapaSmurffAuthor Commented:
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 172.16.0.1/16
  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
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eeRootCommented:
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.

http://www.solarwinds.com/products/solarwinds_free_tools/
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