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VLAN Up/Down Status

Senbonzakura
Level 1
Level 1

Morning everyone,

Quick question as to why this is happening.

I have a switch that is only being used internally and isn't going to the WAN.

For some reason, when the switch is rebooted the VLAN status doesn't stay up and has to manually be thrown up in order for it to work properly. How should I go about this and keep the VLAN up since trunk ports aren't being used.

Thanks again!

7 Replies 7

under the interface vlan do 
no autostate 
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/41141-188.html

 

note:- you have VLAN and you dont have trunk, are you have access port assign  by this VLAN ?

Yes,

I have ports assigned to this VLAN as access ports.
Everything works fine when the VLAN is up, it just doesn't come back up automatically if power is lost to the switch.

the port assign to VLAN must be STP FWD status before the SVI of VLAN become UP. 
I will try do lab for you show you the effect of STP BLK to the UP/DOWN of SVI. 

Screenshot (128).pngScreenshot (129).pngScreenshot (130).png
you can see that after the L2 STP be at FWD status the SVI become UP/UP.

Martin L
VIP
VIP

Make sure no autostate  command is added under the SVI interface vlan X and make sure no shutdown is present and saved in start/running configs.  

Also, check vlan X in vlan database; if possible, make VTP transparent mode (or Off) so that vlan x is saved in configs not not in vlan.db file on flush

Regards, ML
**Please Rate All Helpful Responses **

The biggest problem I ran into is when I go into the VLAN, I don't have a command for autostate anywhere.

If no autostate doesn't exist on that switch, what would be the next step?

I mention autostate before but you must know that not all SW support this feature. 
anyway do you check the point about the STP FWD status ?