[c-nsp] Throttles on an interface

[Rodney Dunn]

Try this:

config t
no spd enable
int fas <x>
hold-queue 4096 in   <on both FE's>

See if the input queue drops stop and if they do see if the throttles
stop.

If so you need to go to the latest 12.4(mainline) code on CCO to get
the fix where we don't throttle an interface on input queue congestion.

Rodney

On Thu, Sep 25, 2008 at 08:13:45AM -0700, Roy wrote:
> Data below.  The machine has two fast E interfaces active (Fa0/0 and Fa
> 6/0) plus a few T1s.
> 
> Roy
> 
> Cisco Internetwork Operating System Software
> IOS (tm) 7200 Software (C7200-IK9S-M), Version 12.2(15)T5,  RELEASE
> SOFTWARE (fc1)
> Image text-base: 0x60008954, data-base: 0x61DE0000
> 
> ROM: System Bootstrap, Version 12.1(20000710:044039) [nlaw-121E_npeb
> 117], DEVELOPMENT SOFTWARE
> BOOTLDR: 7200 Software (C7200-BOOT-M), Version 12.0(23)S1, EARLY
> DEPLOYMENT RELEASE SOFTWARE (fc1)
> 
> mushroom uptime is 15 weeks, 4 days, 7 hours, 16 minutes
> System returned to ROM by reload at 00:47:30 PDT Sun Jun 8 2008
> System restarted at 00:49:23 PDT Sun Jun 8 2008
> System image file is "disk1:c7200-ik9s-mz.122-15.T5"
> Last reload reason: Reload Command
> 
> cisco 7206VXR (NPE400) processor (revision A) with 491520K/32768K bytes
> of memory.
> Processor board ID 16067072
> R7000 CPU at 350Mhz, Implementation 39, Rev 3.2, 256KB L2, 4096KB L3 Cache
> 6 slot VXR midplane, Version 2.0
> 
> Last reset from power-on
> Bridging software.
> X.25 software, Version 3.0.0.
> Primary Rate ISDN software, Version 1.1.
> 2 FastEthernet/IEEE 802.3 interface(s)
> 8 Serial network interface(s)
> 4 Channelized T1/PRI port(s)
> 125K bytes of non-volatile configuration memory.
> 
> 16384K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).
> 250880K bytes of ATA PCMCIA card at slot 1 (Sector size 512 bytes).
> 4096K bytes of Flash internal SIMM (Sector size 256K).
> Configuration register is 0x2102FastEthernet6/0 is up, line protocol is up
>   Hardware is DEC21140, address is 0001.6388.00a8 (bia 0001.6388.00a8)
>   Internet address is 1.1.1.1/30
>   MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
>      reliability 255/255, txload 15/255, rxload 68/255
>   Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
>   Keepalive set (10 sec)
>   Full-duplex, 100Mb/s, 100BaseTX/FX
>   ARP type: ARPA, ARP Timeout 02:00:00
>   Last input 00:00:00, output 00:00:00, output hang never
>   Last clearing of "show interface" counters 09:26:40
>   Input queue: 0/150/171/15119 (size/max/drops/flushes); Total output
> drops: 0
>   Queueing strategy: fifo
>   Output queue: 0/40 (size/max)
>   5 minute input rate 26780000 bits/sec, 4339 packets/sec
>   5 minute output rate 6272000 bits/sec, 2042 packets/sec
>      111824180 packets input, 2348806646 bytes
>      Received 320815 broadcasts, 0 runts, 25 giants, 149 throttles
>      40174 input errors, 0 CRC, 0 frame, 0 overrun, 40136 ignored
>      0 watchdog
>      0 input packets with dribble condition detected
>      48129003 packets output, 2732343828 bytes, 0 underruns
>      0 output errors, 0 collisions, 0 interface resets
>      0 babbles, 0 late collision, 0 deferred
>      0 lost carrier, 0 no carrier
>      0 output buffer failures, 0 output buffers swapped out
> 
> Rodney Dunn wrote:
> > Can you post the 'sh int' and 'sh ver'?
> >
> > I posted a ressponse just yesterday or the day before
> > about input drops can result in throttles.
> >
> > If it's microburst the 72xx may not can handle the
> > rate.
> >
> > On Wed, Sep 24, 2008 at 06:46:06PM -0700, Roy wrote:
> >   
> >> I have a PA-FE on a 7206VXR.  "show int" gives
> >>
> >> Received 7798 broadcasts, 0 runts, 0 giants, 17 throttles
> >>      393 input errors, 0 CRC, 0 frame, 0 overrun, 393 ignored
> >>
> >> The throttles seems to be related to the input errors.  I also see
> >> throttles with no input errors.  We have double checked (and replaced)
> >> the cable and the ports without success.  Is there some sort of buffer
> >> tuning that would affect this?
> >>
> >> Roy
> >>
> >>     
> >
> >