Quick Question - 2 3560 connected together

[martin.germano]

Hi, i have a quick question:

I must connect the link with a new vlan 102, with a ip address per switch or the actual configuration is Ok?

I have to connect 2 3560 layer 3 connected together with a layer 2 trunk link. 

The objective is that switch 1 and switch 2 make both the routing with HSRP, also with spanning-tree

At the moment, are connected like this:

Switch 1 (at this time this switch make the routing)

         ip routing

interface GigabitEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
 priority-queue out
 mls qos trust cos

Switch 2 (not routing right now)

interface GigabitEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
 priority-queue out
 mls qos trust cos

When i make this command "ip routing" in switch 2 i lost comunication.

Thanks!

[Antonio Knox · Accepted solution]

This is probably happened becauss when you entered 'ip routing' the ip stack and all routing capabilities were loaded and could have possibly reset communications.  Close all connections and retry.

Please rate if helpful.

[martin.germano]

  Thanks Antonio, maybe that happend when i make that command. 

  But, the comunicatión between the layer 3 switch must be like this?

interface GigabitEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
 priority-queue out
 mls qos trust cos

Switch 2 (not routing right now)ç

 interface GigabitEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
 priority-queue out
 mls qos trust cos

thats right?

[Antonio Knox · Accepted solution]

Correct.  That link should be fine.  It will default to a native vlan of 1 so the trunk should come up no problem.  Keep in mind that 'ip routing' command only enables routing features, you can still configure switchports and trunks as needed with no issues.  The command doesn't alter switching capabilities.

Also, don't forget to configure VTP if you plan on using multiple vlans across the switches.

Please rate if helpful.

[martin.germano]

  Thanks again Antonio for reply. I have configured STP and HSRP. I prefer not use VTP.