09-11-2019 04:22 AM
Hello Guys,
There’s anything special I need to do to get a bare-metal to pxe boot on a trunk port? I can’t get any machine to pxe boot, would appreciate your help if someone paste there configuration, although all server running flat vlan pxe boot fine with no issues. Thanks.
Hardware (Cisco N5K-C5596UP)
09-11-2019 05:00 AM
09-11-2019 12:52 PM
Thanks for the reply but still not booting , I added---> ip dhcp relay address 10.200.210.4
Here's how my environment is setup
PXE server in trunk/port channel connected to a 5k and the client also is in trunk/port channel connected to the same 5k thanks all.
Server
interface Ethernet1/1
switchport mode trunk
switchport trunk native vlan 2610
channel-group 500 mode active
Client
interface Ethernet1/5
switchport mode trunk
switchport trunk native vlan 2610
channel-group 1 mode active
09-12-2019 02:56 AM
09-12-2019 08:27 AM
To me doesn't make sense why the client in flat vlan work but if I set the trunk don't work, I'm not an expert in Cisco but I think this configuration to pxe boot over the network should be something standard and simple to do, no one in this day's use DVDs or CDs to do install over the network. I'm referring to data center. I will keep trying different configurations
09-12-2019 08:59 AM
Hi
so it works on a flat network because its broadcasting , when you introduce another vlan a broadcast wont be sent through to prevent flooding by default , so the ip relay changes the broadcast to unicast packet and directs it specifically at the the PXE server IP address , thats how it connects
The fact you have done that config on switch side as its all that's required and you know it works on flat vlan also rules out the server side , so the only part left to troubleshoot is whether the actual broadcast to unicast i happening as it crosses between vlans or if there is some irregular transfer of DHCP packets between source and destination when vlan is involved
Unfortunately the only way to check that is too see what is happening on the wire either by debug or by running a wire shark
pxe should work fine on a trunk or an access port
01-28-2020 09:10 AM
01-28-2020 08:33 PM
02-24-2020 08:21 PM
Hey, Guys already fixed the issue turn out the firmware I was using had a bug n5000-uk9.7.3.7.N1.1.bin downgrade to n5000-uk9.7.3.5.N1.1.bin and started to work.
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