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тАО10-19-2009 06:07 PM
тАО10-19-2009 06:07 PM
Network Dropouts on BL460c NIC teams running W2k3
I am having an issue where about every 4 hours I get problems with routing
to bl460g6 blades.
The blades themselves can ping and connect to everything within their own vlan.
They can't ping the gateway and can't be contacted from outside their own vlan.
This happens to multiple blades at once, however ESX service consoles and Windows
2008 servers seem to be ok. All other 2ru servers are fine it is only the blades.
Error corrects itself after about 5 minutes, however, if you clear the arp cache on
the core switches it fixes it instantly.
c7000 chassis
2 x Flex 10 Virtual Connect using 1gb SFP's (upgraded firmware to latest, issue happened before and after firmware u/g)
connected to 2 x cisco 3750's in a stack running etherchannel with 4 vnets assigned. Vnet1 and Vnet4 are
presented to Windows servers in the profile. There are 8 nics visible in windows but only 2 show
as having media connected.
No port errors on 3750 stack or on core switches.
Error logs on blades show media disconnected errors at the same time issue occurs.
Issue occurs with Smartlink enabled and disabled.
Have updated drivers and Network Configuration Utility versions on blades
Any help would be greatly appreciated.
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тАО10-20-2009 07:17 AM
тАО10-20-2009 07:17 AM
Re: Network Dropouts on BL460c NIC teams running W2k3
What teaming mode?
Is TCP Offload Engine turned off on the NICs?
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тАО10-20-2009 08:25 PM
тАО10-20-2009 08:25 PM
Re: Network Dropouts on BL460c NIC teams running W2k3
TOE is on
ARP cache is pointing to the team mac address.
I should probably elaborate more. The core switches are a pair of Cisco 6509 that can't do etherchannel across them. The blades were plugged directly into the core switches until this issue started. Thought it may have been a vnet/etherchannel issue so we put a pair of 3750's between blades and core. Issue continues.
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тАО10-21-2009 05:27 AM
тАО10-21-2009 05:27 AM
Re: Network Dropouts on BL460c NIC teams running W2k3
Too many problems with it...
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тАО10-21-2009 08:32 PM
тАО10-21-2009 08:32 PM
Re: Network Dropouts on BL460c NIC teams running W2k3
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тАО10-22-2009 01:00 PM
тАО10-22-2009 01:00 PM
Re: Network Dropouts on BL460c NIC teams running W2k3
that is the default MAC Address aging time.
I think maybe the Team MAC Address is being sent out the secondary NIC of the team and then the Switch Address Tables point to the wrong NIC (secondary).
What is your NCU version?
If you temporarily disable the secondary NIC does the issue not occur?
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тАО10-22-2009 04:37 PM
тАО10-22-2009 04:37 PM
Re: Network Dropouts on BL460c NIC teams running W2k3
We have dropped a blade down to one NIC on one vnet, not teamed and the issue still occurs. Have forced failover with NCU to either NIC in teams on the others and issue still occurs.
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тАО10-23-2009 07:35 AM
тАО10-23-2009 07:35 AM
Re: Network Dropouts on BL460c NIC teams running W2k3
If so you should ensure that the nics are to the latest drivers and Firmware and check to see that the Virtual Bus Drivers are also at the most current driver level. I would also disable RSS (recieve side scaling) from the HP NCU.
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тАО10-25-2009 06:03 PM
тАО10-25-2009 06:03 PM
Re: Network Dropouts on BL460c NIC teams running W2k3
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тАО10-26-2009 06:55 AM
тАО10-26-2009 06:55 AM