Cisco 7606 RSP720 - no SVI bit/packets counters

Dean Belev dbelev at gmail.com
Wed May 26 03:17:30 CDT 2010


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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