I have a Cisco C3550 switch that I am experiencing some issues with. The issues relates to PXE boot (the pre-boot environment for tasks like imaging).
This switch by default has the access ports configured to:
switchport mode dynamic desirable
This config is apparently for trunking and was hindering the PXE boot for the clients. The clients would not grab an IP address and boot file from the network. So I made some changes to the interface config as so:
switchport mode access
This config sort of resolved the issue, but not completely. The clients can now pick an IP address and boot file form the network, but the boot file does not load.
The interesting thing is if I connect the client/s to a c3500-XL switch, there are no problems. Clients get an IP address, boot file, and the boot file gets completely loaded. Life is good!
I have only encountered this issue with the c3550 switch. What is the necessary config on the switch's interfaces that will allowed the clients to boot properly and load the boot file? The clients, PXE Server, and DHCP server are all on the same subnet.
Why does it work on the c3500-XL switch and not on the c3550 switch?
The interface on the 3500-XL switch is configured like so:
I wanted to add that I hardcoded the interface to 100Full. That solved my PXE boot issue. Although, I am afraid that it will cause more problems than it will solve. Because all my devices (at least clients) are at autonegotiate.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...