Cisco UCS Unable to ping the IP Address of a Cisco UCS B200 M4 from the Fabric Interconnects

[sparkesma65]

We configured some new iSCSI port channels for a new service profile template - no servers bound to the template and bought these online OK

We had four blade servers already set up as ESXi servers - not in use but up and running and part of a vcentre 

We noticed we lost two f the servers in vSphere - i.e. their management network

We rebooted the servers after test management network etc. one came back online OK 

We canot get the other one to regain network connectivity by logging into the fabric interconnects individually - we can ping the gateway and the other servers but receive a unreachable response for this server

No network changes have been made to the servers 

Obviously the port channels coming up had some impact the port channels use a native vlan for iscsi - unique to the address range for iscsi 

Any ideas

[Kirk J · Accepted solution]

If you have added additional uplinks that are carrying traffic that is different from existing uplinks (this is called disjoint layer 2 config), then you will need to use the vlan uplinks manager to associate the appropriate vlans with the appropriate uplinks.

Take a look at the bottom section of https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/unified-computing/white_paper_c11-692008.html which shows the vlan uplink manager associating specific interfaces with specific vlans.

Once you correct this, your networking issues should resolve.

Kirk...

[sparkesma65]

Thank you - that sorted out the issue