Lab21 Architecture Design

I have been deciding on the virtualization tools for my Lab21 between VMWare Player and VirtualBox. Both have advantages on their own. 

There are 3 types of networking in virtualization tools: NAT, host-only, and bridged.

1. NAT - Most commonly used. 
2. Host-only - Mostly for private used.
3. bridged - For advanced user only.
   

While doing my research on which tools to use, I come across an interesting video run OpenWrt router image on a VirtualBox with "host-only + bridged" environment. 

After watching the video, it gives me more ideas about how to design Lab21 architecture.

Links:

• OpenWrt on VirtualBox HowTo
• OpenWrt on x86 hardware
• https://downloads.openwrt.org/releases/21.02.1/targets/x86/64/ 
  

Default Router Passwords

Find or update a default router(and WiFi) password at http://www.routerpasswords.com/

Route Preference

>>>> From Route Preference @ PacketLife

Suppose a router receives a packet destined for the IP address 192.0.2.73. The router has in its routing table the following three routes:

Protocol	AD	Metric	Prefix	Next Hop
OSPF	110	240	192.0.2.0/25	172.16.1.1
EIGRP	90	33789	192.0.2.0/24	172.16.2.1
RIP	120	6	192.0.2.64/26	172.16.3.1

To which next hop address will the packet be routed?

If you picked 172.16.3.1, you're correct. Why? A router evaluates routes in the following order.

1. Prefix Length - The longest-matching route is preferred first. Prefix length trumps all other route attributes.
2. Administrative Distance - In the event there are multiple routes to a destination with the same prefix length, the route learned by the protocol with the lowest administrative distance is preferred.
3. Metric - In the event there are multiple routes learned by the same protocol with same prefix length, the route with the lowest metric is preferred. (If two or more of these routes have equal metrics, load balancing across them may occur.)