[c-nsp] 3750 High Cpu IP Input
Tassos Chatzithomaoglou
achatz at forthnet.gr
Fri Apr 24 12:23:47 EDT 2009
Maybe "ip multicast boundary" can help you.
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_46_se/configuration/guide/swmcast.html#wp1033764
--
Tassos
Lee wrote on 24/04/2009 18:06:
> Too bad the multicast ttl-thresold doesn't work. Does your
> access-list 178 block traffic to 224.0.0.252?
>
> Lee
>
>
> On 4/24/09, Chris Lane <clane1875 at gmail.com> wrote:
>> nterface Vlan217
>> description CUSTOMER A
>> ip address x.x.x.x.x
>> ip access-group 178 in
>> no ip redirects
>> no ip unreachables
>> no ip proxy-arp
>> ip multicast ttl-threshold 3
>>
>> shcpu
>> CPU utilization for five seconds: 92%/51%; one minute: 92%; five minutes:
>> 92%
>> PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
>> 9 14412 39169 367 0.95% 0.19% 0.08% 0 ARP Input
>>
>> 51 155152 901076 172 2.55% 0.92% 0.93% 0 Fifo Error
>> Detec
>> 67 12541 522329 24 0.15% 0.07% 0.05% 0 HLFM address
>> ret
>> 115 622003 413812 1503 7.34% 7.52% 7.49% 0 Hulc LED
>> Process
>> 136 166229 17815 9330 0.63% 0.60% 0.60% 0 PI MATM
>> Aging
>> Pr
>> 168 5892258 12519191 470 25.23% 23.54% 24.45% 0 IP Input
>>
>> 171 32572 45322 718 0.15% 0.13% 0.12% 0 Spanning
>> Tree
>>
>> thanks for input
>> 2009/4/24 Lee <ler762 at gmail.com>
>>
>>>> These TTL=1 are causing the high CPU.
>>> Just out of curiousity, would adding "ip multicast ttl-threshold 3"
>>> and/or "no ip unreachable" on the interface reduce cpu usage?
>>>
>>> Lee
>>>
>>>
>>> On 4/24/09, Richard Gallagher <rgallagh at cisco.com> wrote:
>>>> Input queue was full of packets like this:
>>>>
>>>> Buffer information for RxQ3 buffer at 0x2E792F0
>>>> data_area 0x7BB2AB0, refcount 1, next 0x2E7E210, flags 0x200
>>>> linktype 7 (IP), enctype 1 (ARPA), encsize 14, rxtype 1
>>>> if_input 0x3ABBAE0 (Vlan217), if_output 0x0 (None)
>>>> inputtime 00:00:00.000 (elapsed never)
>>>> outputtime 00:00:00.000 (elapsed never), oqnumber 65535
>>>> datagramstart 0x7BB2AF6, datagramsize 82, maximum size 2196
>>>> mac_start 0x7BB2AF6, addr_start 0x7BB2AF6, info_start 0x0
>>>> network_start 0x7BB2B04, transport_start 0x7BB2B18, caller_pc
>>>> 0x6D1024
>>>>
>>>> source: 74.212.165.187, destination: 224.0.0.252, id: 0x3CDA, ttl:
>>>> 1,
>>>> TOS: 0 prot: 17, source port 58064, destination port 5355
>>>>
>>>> Buffer information for RxQFB buffer at 0x2672BB0
>>>> data_area 0x758C35C, refcount 1, next 0x263960C, flags 0x200
>>>> linktype 7 (IP), enctype 1 (ARPA), encsize 14, rxtype 1
>>>> if_input 0x3ABBAE0 (Vlan217), if_output 0x0 (None)
>>>> inputtime 00:00:00.000 (elapsed never)
>>>> outputtime 00:00:00.000 (elapsed never), oqnumber 65535
>>>> datagramstart 0x758C3A2, datagramsize 64, maximum size 2196
>>>> mac_start 0x758C3A2, addr_start 0x758C3A2, info_start 0x0
>>>> network_start 0x758C3B0, transport_start 0x0, caller_pc 0x6D1024
>>>>
>>>> source: 74.212.165.187, destination: 224.0.0.252, id: 0x3CDA, ttl:
>>>> 1,
>>>> TOS: 0 prot: 17, source port 58064, destination port 5355
>>>>
>>>> These TTL=1 are causing the high CPU.
>>>>
>>>>
>>>> On 24 Apr 2009, at 14:26, Chris Lane wrote:
>>>>
>>>>> Richard Gallagher found that it was one of my customers sending mcast
>>>>> packets with a TTL 1. Tried adding ACL's to lower CPU but this
>>>>> didn't fix.
>>>>> We shutdown Vlan to verify and CPU came down 40% to adequate levels.
>>>>>
>>>>> I have a call into out customer notifying them to fix.
>>>>>
>>>>> Thanks to all for your input
>>>>>
>>>>> Regards
>>>>> Chris
>>>>>
>>>>> 2009/4/24 Chris Lane <clane1875 at gmail.com>
>>>>>
>>>>>> Yes with a high preference.
>>>>>>
>>>>>> 2009/4/24 junior <drrtuy at ya.ru>
>>>>>>
>>>>>> Hello.
>>>>>>> Does this switch have default route?
>>>>>>>
>>>>>>> Chris Lane wrote:
>>>>>>>
>>>>>>>> sh ip traffic IP statistics:
>>>>>>>> Rcvd: 37788273 total, 24253 local destination
>>>>>>>> 0 format errors, 0 checksum errors, 9771492 bad hop count
>>>>>>>> 0 unknown protocol, 27979860 not a gateway
>>>>>>>> 0 security failures, 0 bad options, 7762670 with options
>>>>>>>> Opts: 0 end, 0 nop, 0 basic security, 0 loose source route
>>>>>>>> 0 timestamp, 0 extended security, 0 record route
>>>>>>>> 0 stream ID, 0 strict source route, 7762670 alert, 0
>>>>>>>> cipso, 0 ump
>>>>>>>> 0 other
>>>>>>>> Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
>>>>>>>> 0 fragmented, 0 couldn't fragment
>>>>>>>> Bcast: 2884 received, 87 sent
>>>>>>>> Mcast: 2334 received, 2209 sent
>>>>>>>> Sent: 24621 generated, 8328118 forwarded
>>>>>>>> Drop: 4258 encapsulation failed, 0 unresolved, 83 no adjacency
>>>>>>>> 69 no route, 0 unicast RPF, 0 forced drop
>>>>>>>> 0 options denied, 0 source IP address zero
>>>>>>>>
>>>>>>>> ICMP statistics:
>>>>>>>> Rcvd: 0 format errors, 0 checksum errors, 0 redirects, 0
>>>>>>>> unreachable
>>>>>>>> 9560 echo, 0 echo reply, 0 mask requests, 0 mask replies, 0
>>>>>>>> quench
>>>>>>>> 0 parameter, 0 timestamp, 0 info request, 0 other
>>>>>>>> 0 irdp solicitations, 0 irdp advertisements
>>>>>>>> Sent: 0 redirects, 3129 unreachable, 0 echo, 9560 echo reply
>>>>>>>> 0 mask requests, 0 mask replies, 0 quench, 0 timestamp
>>>>>>>> 0 info reply, 47 time exceeded, 0 parameter problem
>>>>>>>> 0 irdp solicitations, 0 irdp advertisements
>>>>>>>>
>>>>>>>> TCP statistics:
>>>>>>>> Rcvd: 7710 total, 8 checksum errors, 1 no port
>>>>>>>> Sent: 6762 total
>>>>>>>>
>>>>>>>> UDP statistics:
>>>>>>>> Rcvd: 4615 total, 0 checksum errors, 1430 no port
>>>>>>>> Sent: 2909 total, 0 forwarded broadcasts
>>>>>>>>
>>>>>>>> IP-EIGRP statistics:
>>>>>>>> Rcvd: 0 total
>>>>>>>> Sent: 0 total
>>>>>>>>
>>>>>>>> BGP statistics:
>>>>>>>> Rcvd: 162 total, 1 opens, 0 notifications, 1 updates
>>>>>>>> 160 keepalives, 0 route-refresh, 0 unrecognized
>>>>>>>> Sent: 159 total, 1 opens, 0 notifications, 0 updates
>>>>>>>> 158 keepalives, 0 route-refresh
>>>>>>>>
>>>>>>>> PIMv2 statistics: Sent/Received
>>>>>>>> Total: 0/0, 0 checksum errors, 0 format errors
>>>>>>>> Registers: 0/0 (0 non-rp, 0 non-sm-group), Register Stops: 0/0,
>>>>>>>> Hellos:
>>>>>>>> 0/0
>>>>>>>> Join/Prunes: 0/0, Asserts: 0/0, grafts: 0/0
>>>>>>>> Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0
>>>>>>>> State-Refresh: 0/0
>>>>>>>>
>>>>>>>> IGMP statistics: Sent/Received
>>>>>>>> Total: 0/0, Format errors: 0/0, Checksum errors: 0/0
>>>>>>>> Host Queries: 0/0, Host Reports: 0/0, Host Leaves: 0/0 DVMRP:
>>>>>>>> 0/0, PIM:
>>>>>>>> 0/0
>>>>>>>>
>>>>>>>> OSPF statistics:
>>>>>>>> Rcvd: 2363 total, 0 checksum errors
>>>>>>>> 1900 hello, 12 database desc, 2 link state req
>>>>>>>> 345 link state updates, 104 link state acks
>>>>>>>>
>>>>>>>> Sent: 2231 total
>>>>>>>> 1904 hello, 11 database desc, 4 link state req
>>>>>>>> 223 link state updates, 89 link state acks
>>>>>>>>
>>>>>>>> ARP statistics:
>>>>>>>> Rcvd: 2254 requests, 82 replies, 0 reverse, 0 other
>>>>>>>> Sent: 4178 requests, 2447 replies (2 proxy), 0 reverse
>>>>>>>> Drop due to input queue full: 0
>>>>>>>>
>>>>>>>> Thanks for looking.
>>>>>>>>
>>>>>>>> On Fri, Apr 24, 2009 at 7:45 AM, junior <drrtuy at ya.ru <mailto:
>>>>>>>> drrtuy at ya.ru>> wrote:
>>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> Did You check TAC cases?
>>>>>>>> Can You post this switch current configuration with sh ip traffic
>>>>>>>> command output?
>>>>>>>>
>>>>>>>> WBR
>>>>>>>> Roman A. Nozdrin
>>>>>>>>
>>>>>>>> Chris Lane wrote:
>>>>>>>>
>>>>>>>> 1 routed interface.sh platform ip unicast failed route
>>>>>>>> Total of 0 covering fib entries
>>>>>>>>
>>>>>>>> Thanks for reply.. I checked earlier regarding sdm.
>>>>>>>> Its the same on all of my 3750's i have about 20 of them
>>>>>>>> throughout the
>>>>>>>> states, this is probably the quietest one in regards to
>>>>>>>> bandwidth and
>>>>>>>> services.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Fri, Apr 24, 2009 at 7:21 AM, Brian Turnbow <
>>> b.turnbow at twt.it
>>>>>>>> <mailto:b.turnbow at twt.it>> wrote:
>>>>>>>>
>>>>>>>> how many routed interfaces do you have ( sh ip int brief
>>>>>>>> with ip
>>>>>>>> addresses ) ?
>>>>>>>> if more than 8 change the sdm template to routing
>>>>>>>>
>>>>>>>> you can use sh platform ip unicast failed route to see
>>>>>>>> if
>>>>>>>> routes are
>>>>>>>> failing to be programmed into tcam
>>>>>>>>
>>>>>>>> Brian
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> ------------------------------
>>>>>>>> *From:* Chris Lane [mailto:clane1875 at gmail.com
>>>>>>>> <mailto:clane1875 at gmail.com>]
>>>>>>>> *Sent:* venerde( 24 aprile 2009 11.17
>>>>>>>>
>>>>>>>> *To:* Brian Turnbow
>>>>>>>> *Cc:* Peter Rathlev; cisco-nsp at puck.nether.net
>>>>>>>> <mailto:cisco-nsp at puck.nether.net>
>>>>>>>>
>>>>>>>>
>>>>>>>> *Subject:* Re: [c-nsp] 3750 High Cpu IP Input
>>>>>>>>
>>>>>>>> sh controllers cpu-interface
>>>>>>>> ASIC Rxbiterr Rxunder Fwdctfix Txbuflos
>>>>>>>> Rxbufloc
>>>>>>>> Rxbufdrain
>>>>>>>>
>>>>>>>>
>>> -------------------------------------------------------------------------
>>>>>>>> ASIC0 0 0 0 0 0
>>>>>>>> 0
>>>>>>>> ASIC1 0 0 0 0 0
>>>>>>>> 0
>>>>>>>>
>>>>>>>>
>>>>>>>> cpu-queue-frames retrieved dropped invalid hol-
>>>>>>>> block
>>>>>>>> stray
>>>>>>>> ----------------- ---------- ---------- ----------
>>>>>>>> ---------- ----------
>>>>>>>> rpc 0 0 0 0
>>>>>>>> 0
>>>>>>>> stp 1807 0 0 0
>>>>>>>> 0
>>>>>>>> ipc 0 0 0 0
>>>>>>>> 0
>>>>>>>> routing protocol 1516326 0 0 0
>>>>>>>> 0
>>>>>>>> L2 protocol 27 0 0 0
>>>>>>>> 0
>>>>>>>> remote console 0 0 0 0
>>>>>>>> 0
>>>>>>>> sw forwarding 915 0 0 0
>>>>>>>> 0
>>>>>>>> host 2014 0 0 0
>>>>>>>> 0
>>>>>>>> broadcast 1766 0 0 0
>>>>>>>> 0
>>>>>>>> cbt-to-spt 0 0 0 0
>>>>>>>> 0
>>>>>>>> igmp snooping 1518651 0 0 0
>>>>>>>> 0
>>>>>>>> icmp 45 0 0 0
>>>>>>>> 0
>>>>>>>> logging 0 0 0 0
>>>>>>>> 0
>>>>>>>> rpf-fail 0 0 0 0
>>>>>>>> 0
>>>>>>>> queue14 0 0 0 0
>>>>>>>> 0
>>>>>>>> cpu heartbeat 14116 0 0 0
>>>>>>>> 0
>>>>>>>>
>>>>>>>> ODD i have disabled IGMP SNOOPING...
>>>>>>>>
>>>>>>>> On Fri, Apr 24, 2009 at 4:19 AM, Brian Turnbow
>>>>>>>> <b.turnbow at twt.it <mailto:b.turnbow at twt.it>> wrote:
>>>>>>>>
>>>>>>>> You can use show controller cpu to help see whats
>>>>>>>> going to the cpu
>>>>>>>> Make sure you have no ip redirects and no proxy arp
>>>>>>>> on
>>>>>>>> all the interfaces.
>>>>>>>> How many routed interfaces do you have ?
>>>>>>>> The output below for "max" is for 8 routed
>>>>>>>> interfaces if
>>>>>>>> you have more you
>>>>>>>> should change to the desktop switching template.
>>>>>>>> With your roughly your values for indirectly
>>>>>>>> connected
>>>>>>>> routes and 13 ip
>>>>>>>> interfaces on a box I needed to switch the template
>>>>>>>> "sdm
>>>>>>>> prefer routing"
>>>>>>>> requies reload.
>>>>>>>>
>>>>>>>> Regards
>>>>>>>>
>>>>>>>> Brian
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From: cisco-nsp-bounces at puck.nether.net
>>>>>>>> <mailto:cisco-nsp-bounces at puck.nether.net> [mailto:
>>>>>>>> cisco-nsp-bounces at puck.nether.net
>>>>>>>> <mailto:cisco-nsp-bounces at puck.nether.net>] On
>>>>>>>> Behalf Of
>>>>>>>> Chris Lane
>>>>>>>> Sent: venerde( 24 aprile 2009 1.09
>>>>>>>> To: Peter Rathlev
>>>>>>>> Cc: cisco-nsp at puck.nether.net
>>>>>>>> <mailto:cisco-nsp at puck.nether.net>
>>>>>>>> Subject: Re: [c-nsp] 3750 High Cpu IP Input
>>>>>>>>
>>>>>>>> sh platform tcam utilization
>>>>>>>>
>>>>>>>> CAM Utilization for ASIC# 0 Max
>>>>>>>> Used
>>>>>>>> Masks/
>>>>>>>> Values
>>>>>>>> Masks/values
>>>>>>>>
>>>>>>>> Unicast mac addresses:
>>>>>>>> 784/6272
>>>>>>>> 37/235
>>>>>>>> IPv4 IGMP groups + multicast routes:
>>>>>>>> 144/1152
>>>>>>>> 6/26
>>>>>>>> IPv4 unicast directly-connected routes:
>>>>>>>> 784/6272
>>>>>>>> 37/235
>>>>>>>> IPv4 unicast indirectly-connected routes:
>>>>>>>> 272/2176
>>>>>>>> 52/326
>>>>>>>> IPv4 policy based routing aces: 0/0
>>>>>>>> 0/0
>>>>>>>> IPv4 qos aces:
>>>>>>>> 528/528
>>>>>>>> 18/18
>>>>>>>> IPv4 security aces:
>>>>>>>> 1024/1024
>>>>>>>> 57/57
>>>>>>>>
>>>>>>>> Note: Allocation of TCAM entries per feature uses
>>>>>>>> a complex algorithm. The above information is meant
>>>>>>>> to provide an abstract view of the current TCAM
>>>>>>>> utilization
>>>>>>>>
>>>>>>>> Hope this helps.
>>>>>>>>
>>>>>>>> On Thu, Apr 23, 2009 at 4:41 PM, Peter Rathlev
>>>>>>>> <peter at rathlev.dk <mailto:peter at rathlev.dk>> wrote:
>>>>>>>>
>>>>>>>> On Thu, 2009-04-23 at 16:15 -0400, Chris Lane
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>> This box has been in production for over a
>>>>>>>> year
>>>>>>>> and doesn't really do
>>>>>>>> to much as you can see from my orig thread it
>>>>>>>> moves about 11MB.
>>>>>>>>
>>>>>>>> This just started late last night yet we
>>>>>>>> didn't
>>>>>>>> add any new customer
>>>>>>>> nor did anybody even touch switch as the
>>>>>>>> device
>>>>>>>> is remote.
>>>>>>>>
>>>>>>>> I read in an older thread regarding same
>>>>>>>> thing
>>>>>>>> that the person
>>>>>>>> rebooted and of course it resolved issue. I
>>>>>>>> am
>>>>>>>> planning to do that
>>>>>>>> Early tomorrow am, but
>>>>>>>> i really want to know what the heck is
>>>>>>>> causing
>>>>>>>> this.
>>>>>>>>
>>>>>>>> Yes CEF is running.
>>>>>>>>
>>>>>>>> What about TCAM utilisation ("show platform tcam
>>>>>>>> utilization")?
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Peter
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> //CL
>>>>>>>> _______________________________________________
>>>>>>>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>>>>>>> <mailto:cisco-nsp at puck.nether.net>
>>>>>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>>>>>>> archive at http://puck.nether.net/pipermail/cisco-
>>>>>>>> nsp/
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> //CL
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> //CL
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>> --
>>>>>> //CL
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> //CL
>>>>> _______________________________________________
>>>>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>> _______________________________________________
>>>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>>
>>
>>
>> --
>> //CL
>>
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