Brian,
 
Note that this has to do with 'autostate' function in the software and
for conditions for a VLAN to be up/up, check:
http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note
09186a0080160b14.shtml
 
This will not be a bug ;-)
 
Regards,
JS

________________________________

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of GAURAV MADAN
Sent: woensdag 20 februari 2008 13:42
To: Brian K Valentine
Cc: [email protected]
Subject: Re: [OSL | CCIE_RS] SVI basic query


thats what even i thought ..
 
But say I have vlan 10 in vlan database and  int vlan 10 .. no acess
port for vlan 10 , i have a trunk carrying vlan 10 .. as expected my
interface vlan 10 was UP and UP.
 
Now if i remove vlan 10 from trunk ( switchport trunk allowed vlan
except 10 ) ; i still have my SVI in UP state.
 
any light on this .. what i have deduced is that presence of vlan in
vlan database is only point to be kept in mind.

Gaurav Madan.

2008/2/20 Brian K Valentine <[EMAIL PROTECTED]>:


        Hi,

         

        I'm new to the study list, but I believe I can contribute to
this issue.

         

        My understanding is this... In order for the SVI for that VLAN
to come "up and up", you need to have an interface on that local switch
assigned to that VLAN.  In other words, at least one of the ports must
have that VLAN assigned to it as an access VLAN or at least one of the
ports must be trunking that VLAN.  This also implies that the VLAN
exists in the local VLAN database.

         

        Brian

         

        From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of GAURAV MADAN
        Sent: Wednesday, February 20, 2008 1:55 AM
        To: [email protected]
        Subject: [OSL | CCIE_RS] SVI basic query

         

        Hi All

         

        Just wanted to get clearification on something very basic .
Under what circumstances do we have int vlan <> in down state ?

         

        I know that if we create " int vlan x " and vlan x do not exist
in vlan database then there will be no spanning tree instance for this
vlan and the int vlan x will be down .. Is there some other case also ;
where int vlan x is down ..

         

        I note that only vlan presence is the criterai .. Even if i
disable STP for this vlan .. i see interface in UP state .

         

        Thnx

        Gaurav Madan.

         

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