[c-nsp] 6500 SUP720 High Latency and Jitter issues

[Dan Benson]

This router has been in place for about 3 weeks.  Load has increased in 
this period, we have not seen this issue untill the last 2 days.  
Nothing has changed on the BGP/OSPF config.  When I ping other devices 
on the LAN, I do not have any latency or loss.  This only seems to occur 
when we hit the RP.  Pinging a device on the LAN from either of our 
upstreams returns the same results.

Lupi, Guy wrote:

>Was this switch in the network prior to this issue occurring or is this
>switch new?  Any configuration changes to the switch, BGP or OSPF?  If you
>ping from an IP serviced by a directly connected interface to an IP serviced
>by another directly connected interface do you see the same results?  How
>about pings from the switch to an IP serviced by a directly connected
>interface? 
>
>-----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 10:17 AM
>To: cisco-nsp at puck.nether.net
>Subject: [c-nsp] 6500 SUP720 High Latency and Jitter issues
>
>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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>  
>