Unless you have an Etherswitch card present which provides you with Layer 2 Ethernet ports (e.g. HWIC-4ESW or HWIC-D-9ESW) then you cannot create SVIs. In default Cisco 3945 configuration with only on-board routed (Layer 3) Ethernet interfaces, you have to create logical sub-interfaces.
If I understood you correctly and you want traffic from different trunks to be handled by the same IP on the router, the solution might be Integrated Routing and Bridging (IRB). You basically create a bridge-group (e.g. bridge-group 10) and assign different physical or logical interfaces into it. Then you can create a Bridged Virtual Interface (interface BVI 10), just like you would an SVI and configure it with an IP address which is then reachable from all interfaces also part of the same bridge-group. Don't forget to configure bridging of Ethernet frames as well as routing for the IP protocol in the bridge-group. Have a look at this configuration guide:
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...