Cisco 7606 RSP720 - no SVI bit/packets counters

Rodney Dunn rodunn at cisco.com
Wed May 26 06:26:46 CDT 2010


Dean,

Probably good to move this over to cisco-nsp at puck.nether.net and answer 
the questions below over there.

What code is it?

Looks like a bug where the IDB counters are not being bumped on the SVI.

Is it L3 switching traffic through the SVI or L2 (intra vlan traffic 
between L2 ports)?

Rodney



On 5/26/10 4:17 AM, Dean Belev wrote:
> Hi all,
>
> Another strange Cisco behavior - or may be unknown one.
> Creating SVI interface with a lot of traffic passing through - nothing
> suspicious.
> Until ...
>
> /7606#sh int vlan XXX
> Vlan537 is up, line protocol is up
> Hardware is EtherSVI, address is MAC (bia 001c.b0b7.6400)
> Description: 0449-070C001#NetLan_Int
> Internet address is IP/30
> MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
> reliability 255/255, txload 1/255, rxload 0/255
> 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 00:08:18
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> *30 second input rate 0 bits/sec, 0 packets/sec
> 30 second output rate 0 bits/sec, 0 packets/sec*
> L2 Switched: ucast: 25025 pkt, 2426613 bytes - mcast: 0 pkt, 0 bytes
> L3 in Switched: ucast: 3597038 pkt, 3755053095 bytes - mcast: 0 pkt, 0
> bytes mcast
> L3 out Switched: ucast: 2000511 pkt, 602156179 bytes mcast: 0 pkt, 0 bytes
> 3678505 packets input, 3803335802 bytes, 0 no buffer
> Received 0 broadcasts (0 IP multicasts)
> 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 1899084 packets output, 568639522 bytes, 0 underruns
> 0 output errors, 0 interface resets
> 0 unknown protocol drops
> 0 output buffer failures, 0 output buffers swapped out/
> ####
> 7606#sh int vlan XXX summary
>
> *: interface is up
> IHQ: pkts in input hold queue IQD: pkts dropped from input queue
> OHQ: pkts in output hold queue OQD: pkts dropped from output queue
> RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)
> TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)
> TRTL: throttle count
>
> Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
> --------------------------------------------------------------------------------------------------------
>
> *VlanXXX 0 0 0 0 *0 0 0 0 * 0
> #######
>
> All counters but RXBS/RXPS/TXBS/TXPS showing there is a traffic (~400
> Mbps).
> Also visible using MIB values. But the SVI bits/packets not showing it.
> There are 146 SVIs configured there (we have another Cisco 7609 RSP720
> with 393 ones and no such a problem present).
> We deleted around 10 interfaces trying to release any resources -
> without result, delete/create the interface - the same.
>
> Is there any limit I do not know. I tried to read about any limits of
> the number of SVIs - no result.
> Are there any assumptions?
>
> Thank you in advance!
>
> Best~
>
> /Dean Belev
> Network Management Team
> Neterra Ltd.
> Sofia, Bulgaria
> Phone: +359 2 974 33 11
> Fax: +359 2 975 34 36
> Mobile: +359 886 663 123
> http://www.neterra.net/




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