When EIGRP is up and operational, unicast and multicast EIGRP packets or constantly flooding the network to make sure EIGRP routes are up and are using the best path. These packets are important but not always necessary. There are situations when disabling an interfaces ability to spam the network with EIGRP packets is appropriate and will still allow for a fully operational EIGRP convergence. The way to achieve this is by configuring an interface to passive mode. EIGRP will still advertise the network/subnet configured on that interface, however, the interface will not participate in sending or processing of EIGPR packets.
Here is an example:
EIGRP is a Cisco proprietary protocol. If you don’t mind being locked in using a vendor specific protocol you will then enjoy using a robust, well-developed protocol that will meet most enterprise network needs. Here are a few basic bullet points about EIGPR:
Configuring a basic EIGRP network:
Network Design (I’m using sub-interfaces on my equipment, as I have other traffic on other sub-interfaces):
Step 1) Enable EIGRP on every router:
CCNP Routing & Switching ROUTE 300-101 Chapters 3 & 4 Notes:
- IPv6 Address breakdown
- 32 hexadecimal numbers
- 8 quartets
- 4 hex digits separated by a colon
- 128-bit IPv6 address
With the depletion of IPv4 addresses IPv6 was created to solve that problem.
Pages 70 – 87 (1.5 hours)
Started my reading for the CCDA exam, a few important terms from the first chapter:
PPDIOO (Prepare, Plan, Design, Implement, Operate, and Optimize) – PPDIOO is basically an simple process which CISCO uses in deploying or managing services/technologies for a new or existing network.
Out of the many dynamic routing protocols RIP or RIPv2 is probably the most basic and easy to setup. The biggest difference between RIP and RIPv2 is that RIP does not support VLSM (Variable Length Subnet Masking) and RIPv2 does. For the modern network we need to use at least RIPv2 for proper routing.
In order to have packets flowing through the modern network you need Physical Equipment (Layer 1), you need aggregated devices such as switches for quick transport (layer 2), and finally you need routers/layer 3 switches that can route traffic on an ip network (layer 3). Each hop or interface along a path needs to have a layer 3 ip address IPv4 or IPv6 in order for the packet to traverse the ip network. The way that all layer 3 devices make decisions to forward traffic is a routing table. The three ways a layer 3 devices learns and adds routes to its routing table are: