[c-nsp] 6500 - SVI Showing ifInDiscards - Meaning?

William McCall william.mccall at gmail.com
Mon Apr 27 17:26:21 EDT 2009


 Input queue: 0/75/2589982/2425805 (size/max/drops/flushes); Total
output drops: 0 ->> Corresponds with your input drops you see in SNMP.

you might want to try "sh buffers interface vlan11" and try "sh interfaces
vlan11 switching" to take a look at whats going on.

--WJM IV

On Mon, Apr 27, 2009 at 2:57 PM, Devon True <devon at noved.org> wrote:

> All:
>
> What does an ifInDiscard mean on a SVI on a 6500? I did some searching
> and
>
> http://www.cisco.com/en/US/tech/tk648/tk362/technologies_q_and_a_item09186a00800b69ac.shtml
> said that "ifInDiscards -  These are counted as no buffers as reflected
> in the show interfaces command.". The example shows them looking at the
> "ignored" counter of the interface.
>
> This issue was brought about when the snmp counter showed a high amount,
> but the corresponding interface did not.
>
> IF-MIB::ifDescr.64 = STRING: Vlan11
> IF-MIB::ifInDiscards.64 = Counter32: 2589982
>
> Vlan11 is up, line protocol is up
>  Hardware is EtherSVI, address is 0009.7bb8.9400 (bia 0009.7bb8.9400)
>  Description: xxxxxxxxxxxxxxxxx
>  Internet address is x.x.x.x/yy
>  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
>     reliability 255/255, txload 32/255, rxload 38/255
>  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: 0/75/2589982/2425805 (size/max/drops/flushes); Total
> output drops: 0
>  Queueing strategy: fifo
>  Output queue: 0/40 (size/max)
>  30 second input rate 150667000 bits/sec, 63644 packets/sec
>  30 second output rate 128132000 bits/sec, 21616 packets/sec
>  L2 Switched: ucast: 339694471 pkt, 39597395897 bytes - mcast: 1845732
> pkt, 339663263 bytes
>  L3 in Switched: ucast: 355669693266 pkt, 104243041264475 bytes -
> mcast: 0 pkt, 0 bytes mcast
>  L3 out Switched: ucast: 168426931431 pkt, 133867540821374 bytes mcast:
> 0 pkt, 0 bytes
>     356191072919 packets input, 104297673767698 bytes, 0 no buffer
>     Received 1845550 broadcasts (0 IP multicasts)
>     0 runts, 0 giants, 14689 throttles
>     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
>     168607360398 packets output, 133882917573234 bytes, 0 underruns
>     0 output errors, 0 interface resets
>     0 output buffer failures, 0 output buffers swapped out
>
> Running s72033-adventerprisek9_wan-mz.122-18.SXF8.bin.
>
> --
> Devon
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