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I only have one username and one password that I use for TACACS. I am not sure how the switch would get a different username. Is there a default username when you don't specify one? If so why was my TACACS username locked out?
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I only have one username and one password that I use for TACACS. I am not sure how the switch would get a different username. Is there a default username when you don't specify one? If so why was my TACACS username locked out?

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I was trying to ssh to a switch from an open putty session on my current switch but I just typed &quot;ssh x.x.x.x&quot; and all I got was a password prompt. When I entered my password it was not accepted. I tried several times.<br />
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My TACACS account was locked out.<br />
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I should have been typing &quot;ssh -l my_username x.x.x.x&quot; pressing enter and then entering my TACACS password.<br />
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My question is how did TACACS know to lock out my account if I was not putting my username in the ssh command?<br />
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And if TACACS did know my username then why would it not accept my password?
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I was trying to ssh to a switch from an open putty session on my current switch but I just typed "ssh x.x.x.x" and all I got was a password prompt. When I entered my password it was not accepted. I tried several times.

My TACACS account was locked out.

I should have been typing "ssh -l my_username x.x.x.x" pressing enter and then entering my TACACS password.

My question is how did TACACS know to lock out my account if I was not putting my username in the ssh command?

And if TACACS did know my username then why would it not accept my password?

Username option -l using ssh and putty

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Telnet is an application layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols. The term telnet is also used to refer to the software that implements the client part of the protocol. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server.