07-17-2013 05:36 AM - edited 03-01-2019 11:08 AM
Hi all,
we are currently deploying two UCS 220 M3 rack servers. Each of them has two connections. One to the management port and another to LAN1. Both ports are in the same VLAN.
Currently the NIC mode is set to Shared LOM and Redundancy to active-standby. I now want to limit access to the CIMC to the management port only and according to the documentation I have to set NIC mode to dedicated and redundancy to none. Whenever I do that the system loses connection and I have to revert back to the shared LOM mode.
The CIMC version is 1.4(7)
Is there anything I am missing?
Regards,
Patrick
P.S.: On a side note is there a more detailed explanation regarding NIC Modes and the correlation to the redundancy mode? What happens for example if I set the mode to dedicated, which mandates redundancy set to none. How will the other ports react to this? Is it still possible to have them use active-standby or active-active redundancy? If so, how do I have to configure it?
07-17-2013 05:55 AM
Hi,
maybe you will find (most of) the answers in this great document:
I already discovered it last week... Too late for me, but it maybe will help you.
Best,
Timo
07-17-2013 05:57 AM
Sounds like a VLAN tagging issue. Double check the CIMC configuration that you're NOT doing any VLAN tagging on CIMC interface from the web GUI.
What does the two upstream switch port interface configs looks like? Please paste the interface configs. Likely one is not configured properly.
There should be information on NIC modes in the CIMC Guides on CCO. When the CIMC is in dedicated mode, there is no redundancy unless the platform has dual CIMC interfaces. The C220 only has one.
Regards,
Robert
07-17-2013 06:38 AM
Hi Robert,
the CIMC on each of the UCS server have not been configured with VLAN tagging.
Switchport config for LAN1 Interface:
switchport
switchport access vlan
switchport mode access
switchport nonegotiate
no logging event link-status
no snmp trap link-status
no cdp enable
spanning-tree portfast
spanning-tree bpduguard enable
Switchport config for Mgmt Interface:
switchport access vlan
switchport mode access
no logging event link-status
no snmp trap link-status
spanning-tree portfast
spanning-tree bpduguard enable
end
However, what I have forgotten to mention is, that the port where Mgmt is connected to points to a FastEthernet Interface as it is on different switch. Might that the problem?
Regarding CIMC in general. It is my understanding that everything related to CIMC means administration of the UCS server itself. Dedicated NIC mode is then the only means of accessing the CIMC. All the other ports are then used for the OS running on the UCS, am I right?
With redundancy set to none this would basically mean that I am not able to team the NICs anymore?
Regards,
Patrick
07-18-2013 12:36 AM
Yep, it was indeed the FastEthernet Port. I feel dumb now.
Regards,
Patrick
07-19-2013 11:33 AM
The NIC modes are used only to acess CIMC.
If you set it to Dedicated, CIMC traffic will only pass that port. It will not use the LOM ports. However, the LOM port will be able to pass data and will be available for the operating system.
07-19-2013 12:06 PM
Hello,
may be you will find the answer on the below given link.
http://www.cisco.com/en/US/docs/unified_computing/ucs/c/hw/C220/install/install.html
Thanks you,
Regards
keshav
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