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iSCSI vmware cisco unable to ping with two nics

Posted on 2011-09-22
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Last Modified: 2012-05-12
Overview:

2 x Dell R610 servers
VMWare ESXi 5 installed on both Dell hosts
Equallogic PS4000 SAN
2 x Cisco 2960 switches to serve as redundant connection points between servers and san

My physical designs and cisco configuration files are attached

What I am trying to achieve.....

To ensure that my configuration is sound from both the Cisco side and the VMWare side to ensure redundancy and failover.

My switches are configured as follows:

Two LAG connection between switch1 and switch2 are configured on VLAN5

All iSCSI traffic between servers and SAN are configured on VLAN6

In brief,

On server1 I am using NICS 1 & 9 as redundant iSCSI connections to two different switches ....NIC1 goes to switch 1, NIC9 goes to switch 2

The same holds true for server2, NIC1 goes to switch 2, NIC9 goes to switch 1


A curious items I've observed

When I have two vmks within a vSwitch, I cannot ping the interface (sometime NIC1 responds but NIC9 doesn't, sometime they both don't respond to a ping).

I have configured each vmk within only one NIC (as indicated in the manual).

If I remove one vmk/one network card from the networking setup .... my pings respond without a problem.

As an example .... I am on server2 that has two NICS (1 & 9) assigned to 10.20.10.42 & 10.20.10.43
Switch 1 communicates via Gi0/2 to 10.20.10.43 - but no ping reply is received.
If I remove the vmk linked with NIC1 (10.20.10.42) as well as the NIC from the VMWare configuration, I can now ping 10.20.10.43 from Switch 1

I seriously need to get these units online and redundant within the next day .... so any help/insight would be greatly appreciated!


 Visio-Servers-switch-wiring.pdf sw1-confg sw2-confg Server1 - VMWare Configuration (Network) Server2 - VMWare Configuration (Network) Visio-Equallogic-switch-wiring.pdf
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Question by:techhead8532
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eeRoot earned 2000 total points
ID: 36584853
If I'm reading your config right, it look like you have port channel setup on ports that are connecting to different servers.  Port Channel can only work when the bundled ports connect to the same device.  In your setup, redundancy can be provided by the virtual switch within ESX.
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