Tuesday, September 21, 2021

VMware "Observed IP Range" not showing on both vNIC's in portchannel

Hi, we are having an odd issue with some inconsistencies on our VMware hosts, these hosts are physically uplinked to 2 meraki switches in a portchannel on both ends, everything works but what we have seen is that on one of the vNics, the "observed networks" will be seen (so all the relevant VLANS via broadcasts) and the other vNIC doesn't see any networks (just blank), this is odd considering that both sides of the portchannel load balances traffic via scr/dst ip/VLAN and port id's. This is the case for 2 out of our 3 hosts in the cluster.

I have ran a packet capture on both the Meraki ports as well in the portchannel on the Meraki side and can see that broadcasts are going down both links on the same VLAN to.

I have had a Google as well and the only thing I've seen is NIC teaming active/standby configurations, but the portchannel (vNIC's) on the vSwitch isn't in HA as well. Does anyone have any ideas as to why this might be occurring?

Cheers



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