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kessener

4 Posts

31361

November 15th, 2004 13:00

Using BMC/IPMI over VLAN on PE2850

I would like to use the "IPMI over LAN" feature with VLAN option enabled on a PE2850. The servers are connected to a Cisco 6509 with both ethernet ports configured in the OS and with ethernet port 1 shared with the BMC. What would be the appropriate port configuration on the Cisco to accesss the BMC over its configured VLAN 'x' but with the OS traffic running on VLAN 'y' on the same physical port? Trunking enabled? Which one is the native VLAN, 'x' or 'y'? Will the OS have to deal with VLANs?

Thanks and kind regards
Hajo Kessener

kessener

4 Posts

November 26th, 2004 15:00

So I called Dell support and they told me that on a Dell switch BMC can be run over VLAN with two VLANs assigned to the switch port. However, the OS would have to deal with VLAN information as otherwise untagged frames would be dropped.

Tried it today on a Cisco Catalyst 6509 and it works seamlessly without VLAN support in OS. On 4 of our 2850s the OS uses IPs located in VLAN 2. Then configured BMCs on all machines to use VLAN 10 and assigned appropriate IP addresses. On 6509 ports must be set to trunk mode with two VLANs (using port 7/8 as example) and VLAN 2 as native VLAN (not dropping untagged frames):

clear trunk 7/8 1,3-9,11-4094
set trunk 7/8 nonegotiate dot1q 2,10

After this you see two MAC addresses (eth0 and BMC) on CAM table:

sh cam dyn 7/8
10 00-11-43-36-ec-08 7/8 [ALL]
2 00-11-43-36-ec-06 7/8 [ALL]
Total Matching CAM Entries Displayed = 2

Tested access with "ipmish" from a Windows notebook and it works. Great ;-)

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