[c-nsp] cisco buffer misses

[Michael Sprouffske]

Could someone give me some insight as to what is causing the misses?  I'm currently researching this on the inter webs.  I also notice an interface with several drops as well.

 


model: WS-C3750X-24T-S



Buffer elements:
     1061 in free list (500 max allowed)
     3479036431 hits, 0 misses, 1024 created

Public buffer pools:
Small buffers, 104 bytes (total 50, permanent 50, peak 119 @ 7w0d):
     49 in free list (20 min, 150 max allowed)
     1712506149 hits, 23 misses, 69 trims, 69 created
     0 failures (0 no memory)
Middle buffers, 600 bytes (total 25, permanent 25, peak 85 @ 7w0d):
     23 in free list (10 min, 150 max allowed)
     167702 hits, 58 misses, 174 trims, 174 created
     0 failures (0 no memory)
Big buffers, 1536 bytes (total 50, permanent 50, peak 119 @ 7w0d):
     50 in free list (5 min, 150 max allowed)
     244703400 hits, 39 misses, 117 trims, 117 created
     0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 16, permanent 10, peak 16 @ 7w0d):
     0 in free list (0 min, 100 max allowed)
     59 hits, 3 misses, 1429 trims, 1435 created
     0 failures (0 no memory)
Large buffers, 5024 bytes (total 0, permanent 0):
     0 in free list (0 min, 10 max allowed)
     0 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
Huge buffers, 18024 bytes (total 4, permanent 0, peak 7 @ 7w0d):
     4 in free list (0 min, 4 max allowed)
     145363512 hits, 412449 misses, 822729 trims, 822733 created
     0 failures (0 no memory)




GigabitEthernet1/0/11 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 649e.f3e2.7b8b (bia 649e.f3e2.7b8b)
  Description: server ports
  MTU 9000 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:16, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 54011
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 49000 bits/sec, 28 packets/sec
     837676 packets input, 118543994 bytes, 0 no buffer
     Received 492811 broadcasts (481207 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 481207 multicast, 0 pause input
     0 input packets with dribble condition detected
     670450255 packets output, 115399962776 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out