[c-nsp] high cpu usage due to interrupts

[ulisses]

Hi!

On 2007-02-13 11:28:02, Rodney Dunn wrote:
> It will not help unless the ingress and egress interfaces are on
> VIPs and ip mroute-cache distributed is on.

ok

> sh ip mdfs linecard  or something like that will show you if
> mdfs is on.

egress card is in slot2, ingress card is in slot 3, both cards
is exactly the same interface type, with the same VIP [1].

But only one interface is shown!

# show ip mds interface
FastEthernet3/0/0 is up, line protocol is up

With "show ip interfaces" all are shown as
"IP multicast distributed fast switching is enabled" [2]

But other show command shows all slots as being supported supported:

# show ip mds stats linecard

Slot      Status    IPC(seq/max) Q(high/route)  Reloads
 1        active    1552/1652       0/0            2
 2        active    1552/1652       0/0            2
 3        active    1552/1652       0/0            2

# show ip mds stats switching

Slot Total       Switched    Drops      RPF        Punts      Failures
                                                              (switch/clone)
 1   0           0           0          0          0          0/0
 2   0           0           0          0          0          0/0
 3   793372      0           69694      0          723678     0/0


Next, I will show interface stats while forwarding only unicast traffic 

EB-LasPalmas1#show interfaces fastethernet2/0/0 stat
FastEthernet2/0/0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor      42212    4263733     600462  794226267
             Route cache       1164    1657027  362382562 1310489808
       Distributed cache  348137292 4278774324    1742274  579066040
                   Total  348180668 4284695084  364725299 2683782169

[... 20 seconds interval between consecutive "show" ...]

EB-LasPalmas1#show interfaces fastethernet2/0/0 stat
FastEthernet2/0/0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor      42220    4264288     600469  794226717
             Route cache       1164    1657027  362496468 1398057522
       Distributed cache  348245714   43293681    1742275  579066287
                   Total  348289098   49214996  364839214 2771350654

And the result is:

Pkts In:  almost all through the distributed cache

          (348245714-348137292)/20 secs = 5421 pkts/sec

Pkts Out: almost all through the route cache:

          (362496468-362382562)/20 secs = 5695 pkts/sec

witch matches the interface statistics:

  5 minute input rate 25178000 bits/sec, 5680 packets/sec
  5 minute output rate 37065000 bits/sec, 5815 packets/sec

So at least for unicast seems that is working, I assume that the output
path cannot be forwarded with the VIPs...

So I don't understand why iterfaces are not shown in "show ip mds" commands, 
IMHO seems contradictory with the output of "show ip interfaces"... [2]

Tomorrow I will try to use only VIP enabled interfaces for multicast.

Following the instructions of 

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a00800ca800.html

I have verified that everything is ok, but I'm using ip route-cache flow instead
of distributed (in order to enable netflow information on that interface)

I will try that too

Thanks so much for your comments, other than talking about obsolete hardware
I think this can be applied to Cisco in general, not CSR-1 of course ;-)

Again Thanks

regards

	Ulisses

[1]

egress card:

Slot 2:
        VIP2 controller, HW rev 2.14, board revision B0
        Serial number: 25378622  Part number: 73-1684-05
        PA Bay 0 Information:
                Fast-Ethernet PA, 1 ports, 100BaseTX-ISL
                Serial number: 26248560  Part number: 73-1688-05

ingress card:

Slot 3:
        VIP2 controller, HW rev 2.14, board revision B0
        Serial number: 25378613  Part number: 73-1684-05
        PA Bay 0 Information:
                Fast-Ethernet PA, 1 ports, 100BaseTX-ISL
                Serial number: 25234923  Part number: 73-1688-05


[2]

> > > > FastEthernet2/0/0 is up, line protocol is up
> > > >   IP fast switching is enabled
> > > >   IP fast switching on the same interface is disabled
> > > >   IP Flow switching is enabled
> > > >   IP CEF switching is enabled
> > > >   IP Distributed switching is enabled
> > > >   IP Flow switching turbo vector
> > > >   IP Flow CEF switching turbo vector
> > > >   IP multicast fast switching is enabled
> > > >   IP multicast distributed fast switching is enabled
> > > > FastEthernet3/0/0 is up, line protocol is up
> > > >   IP fast switching is enabled
> > > >   IP fast switching on the same interface is disabled
> > > >   IP Flow switching is enabled
> > > >   IP CEF switching is enabled
> > > >   IP Distributed switching is enabled
> > > >   IP Flow switching turbo vector
> > > >   IP Flow CEF switching turbo vector
> > > >   IP multicast fast switching is enabled
> > > >   IP multicast distributed fast switching is enabled

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