Hi
We har the exact same problem with 2 6503E/Sup32 routers after upgrading to
SXI4a.
We downgraded to SXI3, and the problem went away.
Maybe it's a SXI4a 'feature'.
-Jens
>Hi
>I have network where core-devices are Cisco Catalyst 6506-E with
>Sup32/PFC3B. I last month We had two times problem. One time first 6500
>'freezes' and second time second 6500 'freezes' Freezes means machine was
>powered up, alarm was present (diode on supervisor), console wasn't
>responding at all, freeze 6500 created a lot of loops on all VLANs inside
>network (%SW_MATM-4-MACFLAP_NOTIF: Host xxxx.xxxx.xxxx in vlan XX is
>flapping between port XX and port XX), all ports connected to 'freeze' 6500
>was UP, LACP for PortChannels went down. Hard reboot (power off + power on)
>helps both times. There wasn.t any crashdump in
>flash/bootflash/sup-bootdisk/disk. Most problem was caused by loop created
>by freeze 6500 - as all network was overloaded. How I could prevent these
>issue in future ? Maybe storm-control for broadcasts ? Did anybody
>occurred similar problem with 6500 ? After investigate both freezes was
>probably caused by radom disabled/enabled NetFlow ('ip flow ingress') on few
>SVIs.
>Some facts more about both 6500 configurations:
>- Both running 12.2(33)SXI4a IOS. Upgrade was done 1 month ago.
>- Before machines was running 12.2(33)SXH4 never occurred similar problem
>- eBGP (230k prefixes), 3-4 full table BGP peers + iBGP (20 peers rr-clients)
>- IS-IS
>- A little MLS QOS (policing) - 1-2 service-polcies on SVIs
>- Control Plane Policing implemented
>- Sometimes netflow v5 exporting from SVI
>- Load around 40% (show catalyst6000) + 1.5Mpps (sh platf hardw capa pfc)
>- Dual PSs
>- Only ports GE on Sup-32 heavy used
>- WS-X6408A-GBIC linecards but used only 1-2 ports with a little load
>(~50-200Mb)
>- ~300 VLANs
>- ~50 SVIs
>Robert
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Jens S Andersen Email: [email protected]
Aalborg University Telf: 9940 9464
Selma Lagerlöfs Vej 300, 4.2.59 Fax: 9940 7593
9220 Aalborg
Denmark
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