Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Understanding this behavior, SVI configuration

Here is something that I am not sure if I understand:

1) I connected a terminal server which has pre-configured IP=192.168.30.1 to a Cisco switch 2900.

2)When I ping 192.168.30.1 from the Cisco switch, it times out.

3) Then I assigned on the Cisco switch'int vlan 1 = IP 192.168.30.2'.

Then I was able to ping.

I don't understand this though. If the terminal server is already on vlan1, why I was able to ping it only when assiging the IP to the vlan1 interface?

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Blue

Re: Understanding this behavior, SVI configuration

Marlon

You can only communicate between 2 IP devices when they both have an IP address.

So until you assigned an IP address to vlan 1 then you could not ping the terminal server. And because the 2900 is a L2 switch then the vlan interface that you assign the IP address to has to be in the same vlan as the terminal server, or you need a routing device somewhere to route between the switch and the terminal server.

Jon

2 REPLIES

Re: Understanding this behavior, SVI configuration

Can you post your config?

Hall of Fame Super Blue

Re: Understanding this behavior, SVI configuration

Marlon

You can only communicate between 2 IP devices when they both have an IP address.

So until you assigned an IP address to vlan 1 then you could not ping the terminal server. And because the 2900 is a L2 switch then the vlan interface that you assign the IP address to has to be in the same vlan as the terminal server, or you need a routing device somewhere to route between the switch and the terminal server.

Jon

379
Views
0
Helpful
2
Replies
CreatePlease login to create content