[nsp] Re: Per VLAN Stats on MSFC2 - Complaints from the Field

[Ian Cox]

At 11:41 PM 11/25/2003 -0500, Terry Baranski wrote:
>Ian Cox wrote:
>
> > Unsupported MIB objects for Supervisor 2:
> > These are unsupported because of the sharing of the L2+L3
> > multicast counters.
> > IF-MIB object
> >          ifOutOctets
> >          ifOutNUcastPkts
> >
> > CISCO-SWITCH-ENGINE-MIB object
> >          cseL3VlanInPkts
> >          cseL3VlanInOctets
>
>Thanks for responding to this issue -- I appreciate the information, as
>I'm sure everyone else does.
>
>Maybe it's just me because no one else has asked, but I'm unable to
>piece together the connection between shared L2/L3 multicast counters
>and SVI counters; i.e., why does sharing L2/L3 multicast counters
>prevent SVI counters from functioning?  Am I missing something obvious?

The definition for ifOutOctets is all bytes forwarded regardless of them 
being unicast or multicast. With the L2 + L3 multicast counter being 
combined it is not possible to determine how much L3 multicast is 
forwarded. Rather than having an incorrect counter; the decision is not to 
support the counter. The compromise to this situation on the show interface 
command was addition of "L2 Switched: ucast:  pkt, bytes - mcast: 
pkt,  bytes, L3 in Switched: ucast: 0 pkt, 0 bytes - mcast:  pkt, bytes, L3 
out Switched: ucast: 0 pkt, 0 bytes:" fields.


vinstra#sh int vlan 2
Vlan2 is up, line protocol is up
   Hardware is EtherSVI, address is 0007.4fa6.bd4a (bia 0007.4fa6.bd4a)
   Internet address is 10.1.1.51/22
   MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
      reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation ARPA, loopback not set
   ARP type: ARPA, ARP Timeout 04:00:00
   Last input 00:00:00, output 00:00:41, output hang never
   Last clearing of "show interface" counters never
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: fifo
   Output queue: 0/40 (size/max)
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   L2 Switched: ucast: 2961919 pkt, 1608171567 bytes - mcast: 999189 pkt, 
85786227 bytes
   L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 2 pkt, 128 bytes mcast
   L3 out Switched: ucast: 0 pkt, 0 bytes
      522081 packets input, 69723070 bytes, 0 no buffer
      Received 428299 broadcasts, 0 runts, 0 giants, 0 throttles
      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
      97706 packets output, 21264962 bytes, 0 underruns
      0 output errors, 0 interface resets
      0 output buffer failures, 0 output buffers swapped out



Ian



>Thanks,
>Terry