Centos 7 tagged vlan dhcp client

Question

I'm trying to set up a tagged vlan interface to work with DHCP and I want to make sure I have the client config set correctly.

I have ifcfg-ens32 set as:

DEVICE=ens32
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=none

and I have ifcfg-ens32.15 set to:

DEVICE=ens32.15
BOOTPROTO=dhcp
ONBOOT=yes
VLAN=yes

If I attempt to bring the interface up it hangs (hopefully attempting to get a DHCP address) and then bombs out with:

Error: Connection activation failed.

and the address does not show when doing an ip a

Now, I cannot guarantee the DHCP server is working, so is the above normal behaviour?

If I configure the device to BOOTPROTO=none it comes up fine. If I then give it a static address and bring it back up it can ping the router ok so it does look as if the tagging part is working fine.

The configuration looks correct. Check your DHCP server, switch, router, etc. — Michael Hampton, Feb 01 '17 at 09:00
Thanks. Yeah the problem ended up being the dhcprelay not being set right on the router. — Keef Baker, Feb 01 '17 at 09:35

score 0 · Accepted Answer · answered Feb 01 '17 at 08:22

0

The config was correct and working, the dhcpforwarder in the ASA it was connected to was set incorrectly. Fixed this and now it's coming up fine and getting an address as required.

answered Feb 01 '17 at 08:22

Keef Baker

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Centos 7 tagged vlan dhcp client

1 Answers1