[syslinux] 8021q VLANs and pxe problem

[Eli Stair]

If the default VLAN for a port is directly on, or routes to (and has a 
dHCP helper enabled) the DHCP/tftp server you won't have any problems.

In the case that your traffic is not doing what you want, light up a 
packet cap on both ends and double-check your router/switch configuration.

The biggest problem I've seen outside general misconfiguration (not 
implying that's your issue) is using STP.  Most hardware seems to 
isolate a port it sees as 'flapping' for around a minute, sometimes even 
with portfast, when link comes up and down a few times from boot to the 
PXE load.  The STP loop checks appear to stack-up, and each IF change 
seems to cause another check back-to-back (this I've noticed most 
prevalently with Cisco 6500's).

/eli




Robin Mordasiewicz wrote:
> I am using 8021q vlans on my servers, and I cannot figure out how to 
> make PXE/DHCP work.
> Has anyone figured out how to do this ?
> 
> 
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