Status: Done (View Workflow)
Affects Version/s: 7.4
Fix Version/s: None
2x Dell R710
2x Dell Powerconnect 2848 switches
1x Dell Equallogic SAN
XS 7.4 (Upgrading from 7.1 to 7.4 did not resolve the problem..)
Bonded NICs from XSs to switches. Bond 1+2+3 (NIC4 used for management)
HA-Lizard used for HA
Inbound L2 broadcasts failing to specific VLANs. Specifically with DHCP. If VM IPs are set statically all networking functions as expected.
Can see inbound broadcasts get all the way to the hypervisor but are never forwarded up to VMs on the effected VLANs.
Some VLANs work without issue..
Noticed the issue while deploying a new domain controller on this XS pool. Old domain controller runs on another XS 7 box. Attempted to migrate DHCP to the new domain controller. Testing with physical DHCP client can see DHCP discoveries hit the hypervisor (via tcpdump) but never see the broadcasts hit any VM on the troublesome VLANs..
Tested VM DHCP client on the same hypervisor to the new domain controller works without issue.
Tested VM DHCP client on the same hypervisor to the old domain controller. DHCP times out at boot of VM. Login and force DHCP via dhclient. VM finally gets an IP after ~ 1 minute and 19 seconds..
Verify XS network configuration
Verify L2 switch configuration
Verify LAG LACP configuration
Delete and re-create VLAN interfaces on XS
Upgrade XS from 7.1 to 7.4
Reboot servers and switches
For further information review the forum post: https://discussions.citrix.com/topic/394860-inbound-dhcp-failing-for-specific-vlans/
Please feel free to reach out to me.