I will soon have a trunk configured with a metro provider so they can pass vlans from my customers to my network. I will be using a 3560E switch and want to know if I could enable a vlan interface without having to actually utilze a physical port to that vlan.
Right now if I do not assign a physical port to a vlan, the vlan interface show up but protocol is down. For some clients I do not need to use any physical ports as I am just routing traffic received on the trunk link to a different vlan on the same switch. So those vlans don't need to really use a physical port.
The interface and line protocol comes up "up/up" also by creating a virtual interface and assigning it an ip address.
Sorry, but that's incorrect. The SVI (Switch Virtual Interface) relies on a physical port being on active state (up/up) that belongs to that Vlan or a trunk configured on that switch with the Vlan in forwarding state.
If the example above worked for you, most likely you have a trunk on that switch and Vlan 500 is in forwarding state. You can verify this behavior with the show int trunk command.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...