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switch configuration

orkinos used Ask the Experts™
I need to control my project configuration and cabling.(both are HP ProCurve 3400cl switches)
1.Please give advice ist that correct or not?(see picture please).
2.Do i need to configure GBIC module on the switch or switch find automatically?
3.I enables jumbo function only on the switch2 ,switch1 is not configured yet?
   is this effect negative?
4.there is only one vlan(vlan 1 both switches) do i need to create other vlans for my configuration?

Thanks in advance.
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Top Expert 2015
1) I can't recall if the 3400cl's do auto-MDX. Personally, I'd use a crossover between switch 1 and switch 2.

2) It will sense the GBIC automatically.

3) Only if you need jumbo frames on switch 1

4) No.
3. You should enable jumbo frames on both or disable it on both. You should not have it enabled on one and not the other.

4. Having access ports in the native vlan is not usually a best practice (in my experience) . If you have a switch failure that causes a broadcast storm it will usually happen on the native vlan (I personally saw this happen and bring down an entire region of the state for a telecom provider because they left their ports in the native vlan). I would advise  the following for item 4:
Change the 'native' or default vlan
Create a separate management vlan for the port used to manage the switch itself
Create one additional vlan to include all workstation or server access ports


thanks for advices
I though switch use auto-MDX,I know that cross over should be there but i changed my mind in other forum.
I will disable jumbo on switche 2 too.
I see from yours advices there is no problem with config.


I got some info from HP
HP says
3400cl has  Auto-MDIX: automatically adjusts for straight-through or crossover cables on all 10/100/1000 ports
Don JohnstonInstructor
Top Expert 2015

Then you don't need a crossover between the switches.