[c-nsp] 6500 SUP720 High Latency and Jitter issues
Dan Benson
dbenson at swingpad.com
Tue May 24 11:26:48 EDT 2005
Nothing seems to be occuring on the proccessor when my latency hits.
Please see below:
DCA-BV-RTR#sho processes cpu | exclude 0.00
CPU utilization for five seconds: 70%/28%; one minute: 40%; five
minutes: 39%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
42 39388 19169 2054 0.77% 0.39% 0.77% 1 SSH
Process
116 140093140 524624769 267 1.08% 2.62% 2.64% 0 IP
Input
243 5750964 26741621 215 0.69% 0.19% 0.17% 0 Port
manager per
286 3242496 9389779 345 0.07% 0.20% 0.13% 0 BGP
Router
288 89258168 505910 176438 39.50% 4.92% 3.53% 0 BGP
Scanner
DCA-BV-RTR#sho processes cpu | exclude 0.00
CPU utilization for five seconds: 35%/24%; one minute: 39%; five
minutes: 39%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
4 20002060 1015216 19702 7.51% 1.01% 0.75% 0 Check
heaps
42 39408 19175 2055 0.23% 0.38% 0.76% 1 SSH
Process
116 140093420 524626794 267 1.43% 2.53% 2.62% 0 IP
Input
286 3242516 9389823 345 0.23% 0.20% 0.13% 0 BGP
Router
288 89258304 505911 176438 1.59% 4.66% 3.50% 0 BGP
Scanner
DCA-BV-RTR#sho processes cpu | exclude 0.00
CPU utilization for five seconds: 30%/26%; one minute: 37%; five
minutes: 38%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
4 20002184 1015223 19702 1.91% 0.94% 0.74% 0 Check
heaps
116 140094004 524630072 267 1.83% 2.36% 2.57% 0 IP
Input
286 3242532 9389906 345 0.23% 0.17% 0.13% 0 BGP
Router
DCA-BV-RTR#sho processes cpu | exclude 0.00
CPU utilization for five seconds: 32%/28%; one minute: 36%; five
minutes: 38%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
116 140094584 524631994 267 3.75% 2.54% 2.60% 0 IP
Input
243 5751020 26742179 215 0.63% 0.17% 0.16% 0 Port
manager per
286 3242536 9389952 345 0.07% 0.15% 0.12% 0 BGP
Router
DCA-BV-RTR#sho processes cpu | exclude 0.00
CPU utilization for five seconds: 32%/28%; one minute: 36%; five
minutes: 38%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
42 39488 19193 2057 0.23% 0.28% 0.70% 1 SSH
Process
116 140094876 524632948 267 3.43% 2.61% 2.62% 0 IP
Input
276 1897896 15219954 124 0.15% 0.02% 0.01% 0 IP
SNMP
281 3642248 7947776 458 0.23% 0.09% 0.10% 0 SNMP
ENGINE
DCA-BV-RTR#sho processes cpu | exclude 0.00
CPU utilization for five seconds: 35%/31%; one minute: 36%; five
minutes: 38%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
42 39504 19199 2057 0.31% 0.29% 0.69% 1 SSH
Process
116 140095204 524634004 267 3.19% 2.66% 2.63% 0 IP
Input
243 5751056 26742365 215 0.63% 0.19% 0.17% 0 Port
manager per
DCA-BV-RTR#
My spanning tree looks good, and I am not seeing any BGP or OSPF
withdrawls during this period. Thanks for the thoughts. //db
Anthony D Cennami wrote:
>Are you seeing any BGP or OSPF route withdrawls during this period?
>
>Have you validated your spanning tree configuration is loop free? Are you
>using RSTP?
>
>Are you using any non-standard timers on BGP or OSPF?
>
>Could you paste a sh proc cpu during the latency increse?
>
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>>Hello all, I am in dire need of some assistance with a new problem that
>>has started occurring in one of my networks. We are seeing very high
>>Latency and Jitter traversing one of our 6509's that has a sup720 with
>>the PFC3BXL and a GIG or Ram. This period occur every 10 to 15 seconds,
>>and last for about 2 seconds. This is causing a massive amount of
>>troubles for our customers and I am at a loss as to what could be the
>>cause.
>>
>>Hardware:
>>
>> Cisco 6509, Fan2, Sup720,PFC3BXL, 1GIGe of Ram, 1x8 port GBIC gige,
>>1x48 port FE.
>>
>>Config:
>>
>> IOS Version 12.2(18)SXD3, running 2 full BGP routing tables to ISP's
>>VIA FE and GIGe. OSPF running for core network with 5 neighbors. 2
>>VLans with ports assigned to them. 6 GRE tunnels for private access to
>>other offsite POPs. NAT running with overload to a public VLAN
>>interface. Router CPU average load is 50% per 24 hours, peaks around
>>60%, lows around 20%. Mem usage is at 20%.
>>
>>Issue:
>>
>>Every 5 to 15 seconds we are seeing pings like this traversing the box:
>>
>>64 bytes from 147.135.0.16: icmp_seq=2099 ttl=63 time=1.000 ms
>>64 bytes from 147.135.0.16: icmp_seq=2100 ttl=63 time=1.000 ms
>>64 bytes from 147.135.0.16: icmp_seq=2101 ttl=63 time=1.033 ms
>>64 bytes from 147.135.0.16: icmp_seq=2102 ttl=63 time=1.037 ms
>>64 bytes from 147.135.0.16: icmp_seq=2103 ttl=63 time=1.001 ms
>>64 bytes from 147.135.0.16: icmp_seq=2104 ttl=63 time=86.345 ms
>>64 bytes from 147.135.0.16: icmp_seq=2105 ttl=63 time=179.171 ms
>>64 bytes from 147.135.0.16: icmp_seq=2106 ttl=63 time=178.301 ms
>>64 bytes from 147.135.0.16: icmp_seq=2107 ttl=63 time=108.800 ms
>>64 bytes from 147.135.0.16: icmp_seq=2108 ttl=63 time=33.387 ms
>>64 bytes from 147.135.0.16: icmp_seq=2109 ttl=63 time=1.018 ms
>>64 bytes from 147.135.0.16: icmp_seq=2110 ttl=63 time=1.014 ms
>>64 bytes from 147.135.0.16: icmp_seq=2111 ttl=63 time=1.064 ms
>>64 bytes from 147.135.0.16: icmp_seq=2112 ttl=63 time=1.023 ms
>>64 bytes from 147.135.0.16: icmp_seq=2113 ttl=63 time=1.042 ms
>>
>>I am used to the 60 sec. ICMP de-pri BGP update CPU load pinging the box
>>directly, but I have never seen this effect devices on the far side of
>>the router. Any input on this is greatly appreciated. //db
>>
>>
>>
>>
>>
>>_______________________________________________
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>>
>>
>>
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