Join Lazaro Diaz for an in-depth discussion in this video Exploring wildcard masking, part of Advanced Topics in Cisco Routing: RIPv2, EIGRP, and OSPF.
- All right, we've talked about Wildcard Masking,…but let's see how we actually create…or acquire our Wildcard Mask.…This method must be the easiest method in the world…to go ahead and calculate your Wildcard Mask.…You start with a Constant Number…of 255.255.255.255.…That number never changes.…And then you take your Subnet Mask,…whatever that may be.…In this scenario right here, in this case,…we have a 255.255.255.0.…And then you subtract it.…
So if you take away zero from 255, it's 255.…And then if you take away 255 from 255,…it's zero, and it's the same for the rest.…Well there is how you acquired that Wildcard Mask…if given this Subnet Mask.…You have this 0.0.0.255 Wildcard Mask.…Pretty straightforward, pretty simple.…Let's look at another example.…We still have the same Constant Number,…but now our Subnet Mask has changed…to a 252 at the end, the fourth octet.…
So what do we do?…We take that 252 and we subtract it…from the 255, which gives us a three.…The other 255s are all gonna be zero…because when you take 255 from 255…
- Configuring static and default routes
- Understanding dynamic routing
- Issuing verification commands
- Comparing RIPng and RIPv2
- Using RIP timers
- Configuring an EIGRP feasible successor route
- Exploring EIGRP options
- Introducing the OSPF process ID
- Exploring wildcard masking
Skill Level Advanced
1. Configuring Routing on a Cisco Router
2. The Routing Information Protocol (RIP)
3. The Enhanced Interior Gateway Routing Protocol (EIGRP)
4. The Open Shortest Path First (OSPF) Routing Protocol
Wrapping up3m 5s
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