line vty question

Quick question,

When watching the CBT Nuggets video they said that... (the example is for the switch in the video) when you configure

line vty 0-15 (16 sessions total) is for each of the virtual ports that you are able to telnet/ssh into.

I wanted to make sure that this is completely separate from the physical ports on the switch. I thought it would be logical if you had a 24 port switch than you should be able to have 0 - 23 (24 sessions total)

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Comments

networker050184

This is separate from physical ports. This is a terminal session to the switch itself. All 16 of the session could connect through a single physical interface.

Zartanasaurus

The physical ports and vty lines have nothing to do with each other (other than the fact the switch would have to be physically plugged into the network to be accessed via a vty line).

The 16 vty lines is a software limit on the amount of concurrent vty sessions that are available. Much like how you are limited to 2 RDP sessions to a Windows server, regardless of how many NICs you have.

RouteMyPacket

Zartanasaurus wrote: »

The physical ports and vty lines have nothing to do with each other (other than the fact the switch would have to be physically plugged into the network to be accessed via a vty line).

The 16 vty lines is a software limit on the amount of concurrent vty sessions that are available. Much like how you are limited to 2 RDP sessions to a Windows server, regardless of how many NICs you have.

Sound explanation.

Michael2

VTY lines just allow for configuration via telnet/ssh. It's not like a port that's used as a VTY port cannot be used for anything else. Frankly, I don't know why so many VTY lines would be necessary. I just know what I need to know for the test and that's all I'm worried about for the time being.

NetworkVeteran

A VTY line that is in use cannot be used for anything else.

That's why a device with so many are desireable. On older devices with only 4 VTY lines, you can have serious headaches, when some admin(s) forget to log out. You end up playing with inactivity timers, which also cause headaches.

Michael2

NetworkVeteran wrote: »

A VTY line that is in use cannot be used for anything else.

Right, that's what I meant. Sorry.