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 ?
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 ? > > > _______________________________________________ > SYSLINUX mailing list > Submissions to SYSLINUX at zytor.com > Unsubscribe or set options at: > http://www.zytor.com/mailman/listinfo/syslinux > Please do not send private replies to mailing list traffic. > >
We (our sys admin and I) have configured this few days ago ;) Our DHCP is on a linux box (RedHat 9) and the VLAN switch is a Cisco 3550. The DHCP server is directly connected to the vlan switch. Here are the steps we have performed: * load the kernel module 8021q * add ip address with vconfig tool so that there is one interface per vlan * change the settings of the port of the DHCP server in mode trunk AND in mode 8021.q And it should work. We have used this thread as source (should be more verbose than those steps ;) ): http://www.linuxquestions.org/questions/showthread.php?t=381662 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 ? > > > _______________________________________________ > SYSLINUX mailing list > Submissions to SYSLINUX at zytor.com > Unsubscribe or set options at: > http://www.zytor.com/mailman/listinfo/syslinux > Please do not send private replies to mailing list traffic. >
On Wed, 14 Dec 2005, Boris Lenzinger wrote:> We (our sys admin and I) have configured this few days ago ;) > Our DHCP is on a linux box (RedHat 9) and the VLAN switch is a Cisco 3550. > The DHCP server is directly connected to the vlan switch. > > Here are the steps we have performed: > * load the kernel module 8021q > * add ip address with vconfig tool so that there is one interface per vlan > * change the settings of the port of the DHCP server in mode trunk AND > in mode 8021.q > And it should work. > > We have used this thread as source (should be more verbose than those > steps ;) ): http://www.linuxquestions.org/questions/showthread.php?t=381662 >I will try the bootp helper settings, thanks.