This side is long overdue for an ASA "quick reference guide" for configurations, so here it is! Before diving head first into brand new studies I wanted to create a bottom up config demo of ASA firewalls for reference when needing to configure or troubleshoot ASA issues, I will give some brief explanations of concepts … Continue reading Cisco ASA lab – Configuring the ASA at Site B with Security Zones / DHCP / ACLs / PAT / Static NAT with explanation along the way!
I sure miss turning on my space ship / physical lab from my CCNP R/S studies 🙂 This will be a review of some fairly basic networking information that is so basic and forgettable that I should probably review it, though I am very tempted to just skip right over this portion of this weeks … Continue reading Week 3 of the Cisco DevNet Grind – Some review of well known ports, and some network info specific to DevNet usage!
Some quick notes from labbing tonight that I thought is good to knows for Exam day, this will all be very messy crap with output behaviors, no editing out to make it look nice! ALSO one important note I keep forgetting - It is for PRIVATE VLANS that VTP and neighbors hosting Private VLAN must … Continue reading Quick Takeaways from DHCP Snooping / Dynamic ARP Inspection / VLAN Access-List labbing session and misc tips for Exam Day success!
Taking an easy topic to review tonight, two DHCP Hosts (R1 and R2), along with a DHCP Server connected via L2 EC Bundled Trunks. This is really for my own practice / review, so you can skip this post if you have this nailed down for exam day, otherwise just a quick refresher / light … Continue reading DHCP – A quick review of configuration for Exam Day, just straight forward configs, some tshooting, and real world examples thrown in there for you!
(I did actually plug in a Rogue server for the sake of time this lab, but its there!) Consider the above Topology, and how DHCP works from the Client side, that the Client accepts the first DHCP Offer message it receives - What if a Rogue DHCP Server is placed on the network segment with … Continue reading DHCP Snooping – Fundamentals, Design Issues explained, Config / Verification output demonstrated, other misc info!
I will start with the basic Fundamentals of how DHCP requests work first here A Client initiates the DHCP Process by sending out a "DHCP Discover" Broadcast packet to the network, to find a DHCP Server that will respond back with a "DHCP Offer" Broadcast packet, the Offer packet containing Usable IP Address / Lease … Continue reading DHCP – Fundamentals, DHCP Pool Config / Verification, Dynamic and Static Bindings, and DHCPv6 explained!