Why PXE client is failing with “TFTP cannot open connection”? ESXI or Linux

Posted: June 9, 2016 in TFTP cannot open connection"

Issue

Why PXE client is failing with “TFTP cannot open connection”?
The client system can get its IP assigned from DHCP, but after that process it got ARP time.

tftp

Raw

PXE-E11: ARP timeout
PXE-E11: ARP timeout
PXE-E38: TFTP cannot open connection
PXE-MOF: Exiting Intel PXE ROM

Resolution

Check and allow tftp through firewall.
Make sure, tftp is listening to port 69
Make sure, dhcp server is providing correct IP address of tftp server.

Root Cause

There could be multiple reasons for this error.
Either firewall is blocking the tftp connection.
TFTP is not listening to port 69
DHCP is not providing the correct Next server IP address.

 

If you are using multiple subnet for different purpose in the same network u have to add that information otherwise it will fail

example

subnet 192.168.0.0 netmask 255.255.255.0 {
option routers 192.168.0.1; —————-used ESXi instllation

subnet 192.168.0.128 netmask 255.255.255.192 {
option routers 192.168.0.129; —> used VM OS installtion

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