[c-nsp] 6500 SUP720 High Latency and Jitter issues
Tim Stevenson
tstevens at cisco.com
Tue May 24 12:50:16 EDT 2005
It depends on the exact configuration, but yes, we can do GRE encap/decap &
NAT/PAT with hardware assist. For NAT, NAT xlation/session setup & teardown
is done in software, the rest in hardware.
Tim
At 08:43 AM 5/24/2005, Church, Chuck pronounced:
>Anything showing up in the logs? It's my understanding that the PFC3
>can do GRE and NAT itself, leaving the MSFC with just the OSPF and BGP
>processes to do. Any weird QOS configured on it?
>
>
>Chuck Church
>Lead Design Engineer
>CCIE #8776, MCNE, MCSE
>Netco Government Services - Design & Implementation
>1210 N. Parker Rd.
>Greenville, SC 29609
>Home office: 864-335-9473
>Cell: 703-819-3495
>cchurch at netcogov.com
>PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D
>
>
>-----Original Message-----
>From: cisco-nsp-bounces at puck.nether.net
>[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Dan Benson
>Sent: Tuesday, May 24, 2005 11:27 AM
>To: Anthony D Cennami
>Cc: cisco-nsp at puck.nether.net
>Subject: Re: [c-nsp] 6500 SUP720 High Latency and Jitter issues
>
>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?
> >
> >
> >
> >
> >
> >
> >>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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> >>https://puck.nether.net/mailman/listinfo/cisco-nsp
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> >>
> >>
> >>
> >
> >
> >
> >
>
>
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Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Technical Marketing Engineer, Catalyst 6500
Cisco Systems, http://www.cisco.com
IP Phone: 408-526-6759
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