I have a scenario that requires I set login and password protection on telnet access. Typically I go to line vty 0 4 and set login and a password. On 2500s I use 0 4 but I'd seen more lines on other routers. So I tried higher numbers and the 2500 let me put in line vty 0 197. In the conf gi display it separates the 0 4 and 5 197 vty lines but they all show.
How many vty lines are there that need to be protected? Did I created additonal ones above the default when I used 0 197?
I think, the total number is actually dependent on the hardware you are using. By default all routers have 5 vty lines (factory defaults). Unless you configure the remaining available lines, there is no need for them to be protected. You created additional lines, when you specified the number 0 197. Hence you will need to protect those lines, ones they are created. They can also be removed using the command "no line vty".
Router groups 0 to 4 and 5 through 197 separately.
If you take a 1700 router, the total number of lines you can configure is upto 15. So the number of lines, varies for diff hardware platforms.
That sounds strange, I just checked on a 2610, and it did have 15 lines, default was 5. I created 10 more lines using command (line vty 0 15). It created two groups, 0 through 4 in one group and 5 through 15 in another group (listed separately on the configs).
When I gave a "no line vty 5 15", it removed all of them.
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