I'm working on my cisco lab. Every device is plugged in to my switch (computer, router, firewall). Whenever I telnet from my computer direct to my router, it works for a second and then disconnects. I cant then reconnect. If I telnet to my switch first, and then telnet from my switch to my router, it works fine. I tried connecting my router to different ports on the switch. Why does it do this?
Can you ping the router interface from your PC. Sometimes being connect to a WAP while plugged into a different network, such as your switched network, can cause issues; disable secondary network connections. Sometimes Windows firewall can cause issues; disable that. Post any configs you have available.
My computer 10.0.0.100 (recieved from DHCP - Directly plugged in to switch)
If I telnet to 10.0.0.3 it makes a connection and prompts me to login. Before I can complete the login it disconnects me, and I cannot reconnect. I can ping 10.0.0.3 just fine. I can then telnet to 10.0.0.2 and login, and then telnet from there to 10.0.0.3 and it works fine.
I'm following what your saying, but that still doesnt answer why I can successfully telnet the switch and not the router. How would I check the "encapsulation" on the firewall and switch? An ip address is an ip address. I dont see why my computer recieving it via DHCP from the firewall would make any sort of difference.
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