EIGRP Features and Advantages

The goal of EIGRP is to solve the scaling limitations that IGRP faces, while keeping the advantages of distance vector routing protocols: simplicity, economy of memory, and economy of processor resources. EIGRP is scalable in terms of hardware resources and network capacity. EIGRP is also lightning fast. Cisco identifies four principal components of EIGRP: • Protocol-dependent modules— EIGRP supports several routed protocols independently. The two that are of interest to..

QoS Models

As briefly introduced earlier, there are two models for providing the differentiated levels of network service required in converged networks: IntServ and DiffServ. IntServ Overview Think of best-effort IP service in terms of the regular mail (snail-mail) service. The mail is delivered if and when it can be, but it also might be lost (arriving at some undetermined time in the future or not at all). By comparison, IntServ is analogous to a custom mail service, such as diplom..

MPLS Nonstop Forwarding Architecture

MPLS control-plane SSO requires two instances (active and standby) of IP routing protocols and label-distribution protocols. The active instances reside on the active control processor that controls the system. The standby instance resides on the standby control processor that maintains state for the stateful components and waits to become active following a control-plane switchover. The active instances of IP routing protocols and label-distribution protocols establish sessi..

Technical Overview of Cisco IOS Frame Relay Compression Schemes

This section introduces the different compression schemes for Frame Relay that are supported by the Cisco IOS software. In general, users select a compression scheme that falls under either the payload compression scheme or packet header compression scheme.   Data Payload Compression Schemes   The Cisco IOS software supports a packet-by-packet payload compression scheme using Stacker compression. The Cisco packet-by-packet payload compression for Frame Relay feature..

Filtering PIM Neighbors

In this example, we will configure a neighbor filter on Router1's FastEthernet interface, which it uses to connect to a foreign router called Router2: Router1#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router1(config)#ip multicast-routing Router1(config)#interface FastEthernet0/0 Router1(config-if)#ip address 192.168.1.1 255.255.255.0 Router1(config-if)#ip pim sparse-mode Router1(config-if)#ip pim neighbor-filter 18 Router1(..