: Provides 8 network interfaces for standard switching scenarios.
: .qcow2 (QEMU Copy-On-Write 2), which is the standard format for virtual machine disk images used by QEMU and KVM hypervisors. Operational Details cat9kvprd171201prd9qcow2 best
: This is the "best" official paper for understanding the throughput limits and supported features of the virtual platform. You can find it on the Cisco Official Site Release Notes for Cisco IOS XE Dublin 17.12.x : Essential for identifying bug fixes specific to the build and new CLI commands introduced in this cycle. : Provides 8 network interfaces for standard switching
: Supports testing for Cisco’s Software-Defined Access (SDA) architecture without needing physical switches. You can find it on the Cisco Official
The keyword refers to a specific virtual machine image for the Cisco Catalyst 9000v (Cat9kv) virtual switch. Running on the Cisco IOS XE Dublin 17.12.1 software, this image is widely considered the "best" choice for modern network labs because it is an Extended Maintenance Release (EMR) , offering a long support lifecycle and a highly stable feature set for virtualization environments like EVE-NG , GNS3 , and Cisco Modeling Labs (CML) . Why 17.12.1 is the Optimal Choice for Network Labs
The shift to the 17.12.1 release brought several improvements that make it superior to previous versions like 17.03 or 17.06 for labbing: