I have 5 2960 switches configured in my network. The issue I am facing is that while telnetting to the switches (eg: A) sometimes abruptly the telnet connection gets closed and repeated attempts sees the Telnet connection being refused. What I then do is telnet to another switch (B), and from there telnet to the original switch (A). That never fails.
The switches are all on one Default VLAN (192.168.1.0) and I am on a Management VLAN (192.168.40.0). Is there any correlation between different subnets and telnet? There shouldn't be as the issue is only intermittent and random.
Also the Line config looks like this:
line vty 0 1 password 7 AAAAAAAAAAAAAAAAAAAAA login line vty 2 4 password 7 BBBBBBBBBBBBBBBB login line vty 5 15 login !