We recently replaced our older routers with Cisco 6509's (w/msfc cards). Since doing that, our Centillion 5000 switches lose IP connection off and on throughout the day. Some other various devices do as well (servers, etc.). If I keep a constant ping going to the switch or device, then it is always reachable. This happens at more than one site of ours. Can anyone offer any suggestions?
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loss of connection
- Thread starter pattymcse
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There is a bug when running 6509s w/ MSFCs in hybrid mode. The CEF/ARP tables become corrupted, and it takes a clear ip route * to fix the issue. Since you can hit the devices from the MSFC, but not from beyond the MSFC, this might fit your situation. We switched all of our 6509s to Native, that fixed the issue.
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If it looks like a switch, with a router blade, it is hybrid. If the whole gosh darn thing looks like a router, including fast ethernet ports, it is Native. So try a show ip interface brief from the router, and if fastethernet ports show up, its Native. If only VLANs and WAN links show up, its not.
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do you see status errdisable when you do a 'show port'? It is highly recommended by Cisco that you NOT use 'auto' settings for speed/duplex. We get frequent 'errdisable' status on our 6509 if we do not 'set port speed 10/100' and 'set port duplex half/full'. Must do same on all NICS on the network and other switch ports connectin to 6509.
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Maybe this will help? "If you lived here, you'd be home by now!"
George Carlin
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