OSPF Summarization is done only on ABR and ASBR routers in your OSPF domain, and use two completely different commands, but what if a router is an ABR and an ASBR? For example, did you know that using the command "default-information originate ..." you are telling the router to create a Type 5 LSA to … Continue reading OSPF: Important details regarding Summarization and Default Routes for exam day, it’s a long but worthwhile read!
Only the NBMA and Ethernet segments will be used for quick demonstrations and clarity, unless R4 or R5 is needed for demonstration. Now the idea of a Prefix-List in comparison to an Access-List may be hard to follow, but I will try to explain it. An Access-List at its most specific (Extended) matches only on … Continue reading EIGRP: DEEP Dive into Prefix-List configurations, Access-list vs Prefix-list, using Prefix-Lists to Filter EIGRP routes with Distribute-Lists!
I'm was going to wait for the NTP part of the course to go through this, but since it looks like ACL material finishes with this I will use the time-range command for now rather than synchronizing the network to an NTP server. A bit of a refresher from CCNA material, but it can't help … Continue reading Time based ACL’s, configuring time-range and differences in types of ranges, using time-based ACL’s to limit telnet access
I was going to just use two routers for this example, after work when I was tired and rushing, so I stopped and decided to be thorough I didn't want to work with loopbacks. So please forget the Stub things in the topology, those area's are not stubs, however the OSPF information is correct. Also … Continue reading Access-List Refresher: Standard, Extended, and Named ACL’s – Very good refresher material, some of this material like best practices I had even forgotten