---------- Forwarded message ---------- From: CCIEin2006 To: Cisco certification Date: Wed, 11 Jan 2006 13:52:13 -0500 Subject: Switched Virtual Interfaces on Cat3550 vs Cat6500 Hey guys, I made some observations and I was wondering if someone could verify/explain them. 1. When creating a SVI on a Cat3550 switch (i.e. Interface Vlan50) the interface will remain in a down/down state until the actual vlan (in this case vlan 50) is configured. Is this correct? 2. When creating a SVI on a Cat6500 switch, creating the actual vlan is not enough to bring the interface to an up/up state. You actually need a device connected to that vlan to be in an up/up state. If there are no devices connected to that vlan the virtual interface will go to down state. Is that correct? Why is that? Thanks! ---------- Forwarded message ---------- From: James Ventre To: ccielab@groupstudy.com Date: Wed, 11 Jan 2006 16:19:40 -0500 Subject: Re: Switched Virtual Interfaces on Cat3550 vs Cat6500 On a 6500 - you can disable that feature (for everything or specific vlans). It's called the MSFC Auto-State. It's so that if you lose a link to a network (or all the ports in a vlan goes down) you no longer advertise that network (don't advertise for things you can't deliver on) James ---