Discussion - Why does nobody try to compete with the CCNA exam?

I used to be a Cisco fanboy, but not anymore. However one thing that I respect about Cisco is their documentation. No other vendor documents protocols/processes/products like Cisco does. This is also true with their certs.

My question is why haven't other vendors came together and try to build a decent vendor-neutral network certification that actually teaches you stuff? I was surprised to see that only the CCNA teaches you about subnetting, how to use a serial console and basic routing. The Network+ is a bit useless if you ask me since it teaches you very basic stuff and it hardly counts as an achievement.

Below a list of stuff that should be vendor neutral.

- Subnetting

-IPv6

-Routing with OSPF

-Basic BGP

-Layer1/2 ethernet standards.

-IPsec VPNs

-NAT (including 6to4 4to6)

-Stateful firewalling.

-Protocol fundamentals with wireshark.

-Basic *nix commands (since all vendors use a *nix product as an underlay for their operating systems).