If you don't have a serial port, I suggest the TU-S9 available from Amazon for $7.65, and it is prime if you are a prime user. I have purchased about 200 of these for the engineers at work. If you are a windows person, the main issue you will have with the Tu-s9 is that is can change serial ports (com1, com2, etc). It will tend to stay at the same place for some users, and others see it change almost every time they use it. I think it depends on how many other things you connect to with usb. All of the serial to usb converts do this. To find it's com number on windows 7, go to your start button, then to devices and printers, and scroll to the bottom and you will see it. On windows 10 it is settings> devices, bluetooth, printers>connected devices> and it will show up as a prolific USB to serial com port (comX).
Once you know the com port number, you can use
putty. Don't download putty from a "free downloads" site, as they will pack it with a malware payload or have an old version. Putty is a term program that can do telnet, serial, ssh, rlogin. use serial, your assigned com number, 9600. You can customize putty, and don't forget to save your settings so they are easy to use again. Putty is what I use as a ssh client into all of my other systems.
Sorry if you already know all of this, but I work with a team of router engineers, and every once in a while a new engineer will be having trouble, and he will confide in me that he is having difficulty with this "proprietary" rs232 stuff... I'm an old guy that has been using rs232 since 1978, and back then rs232 was used like Ethernet is used today. So I have been making rs232 cables since before many of you were born, probably. The point is, rs232 is old, and if you aren't old, you may have never seen it.
I'm a Cisco hack, and I started one of the first ISP's in 1987, and ran it for 20 years, and I've designed routers and IOT devices, and I manage a lab that designs and supports one of the largest deployed routers on the planet... So while I'm not the end-all expert, I can sometimes be helpful. I have a Cisco 4948 (and a number of other cisco models) in my home lab, and the two 10g ports on it were not enough... So like the rest of you here, I'm here for the scoop on the LB6M. My $350 LB6M has not arrived yet, but I hope to use it to provide high speed networking to my home FreeNAS file servers, and the workstations and VMware servers that will use it for bulk storage. I use VLANs and layer 3 devices extensively, and I'm hoping the lb6m will give me what I need. I would rather have a Cisco, but they cost too much.
I see from elsewhere in the thread that I paid too much for my lb6m... Oh Well...