Frame Relay Basics

Frame Relay Benefits: Frame Relay is specifically designed for bursty LAN applications. it supports a wide range of traffic pattern and topology model, and can consolidate previously separate network into one-network solution. Frame Relay FR’s predecessor Require only one FR local physical link dedicated physical p2p link for per type of data per peer High …

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X.25 Network

X.25 Introduction X.25 is the oldest Packet-Switched service, created even earlier than OSI model. It is designed for low data rate and high error-rate transmission facilities, and provides error correction and orderly delivery on hop-by-hop basis. X.25 specification defines the interface between DTE and DCE, while X.75 defines the interface between two x.25 networks. X.25 …

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WAN Technology

WAN Technology Definition: WAN Technology is pretty much about a point-to-point (or multi-point) private (represents Bandwidth is exclusively used) leased line Connecting customer’s private LAN to SP or Carrier, or link together separate LANs over a wide area.WAN technology solves the problem about how to allocat the BW that ISP Access Point provided to customers …

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BGP Concepts

BGP Basic concepts BGP neighbors do not have to reside in the same subnet as long as IP address is accessible. BGP neighbors use TCP connection (179) to exchange topology information. 16-bit ASN assignments  Next-Hop in BGP advertisement: For EBGP, the next hop is always the IP address of the neighbor specified in the neighbor …

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Network Protocol Concepts

Ethernet Frame Struncture Note: minimal octets for payload is 42 when 802.1Q tag exists, otherwise it is 46 octets. Dynamic Trunking Protocol (DTP) DTP is used by interface to automatically negotiate trunking with neighboring interface who resides in the same VTP domain. Switch interface support below trunk configurations. Form ISL or 802.1Q trunk automatically, DTP …

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EIGRP Concepts

EIGRP Manual Route Summary   Route summary command is configured on the interface which faces all the subordinate subnets, and only the summary route is broadcasted in all other interfaces.  Whenever route summary configured, the summary route will be injected into local routing table with an outgoing interface of Null0, which is called “discard route”. …

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Policy Based Routing

By default, most cisco routers performs CEF. After the de-encapsulation of received packets on incoming interface, router can perform PBR before matching the packet’s destination with the CEF table, or reverse order depends on configuration. Basic PBR configuration steps Standard or Extended ACL: access-list 101 permit ip host 10.1.1.2 10.1.3.0 0.0.0.255 Route Map Configuration: route-map …

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Route Redistribution

What is Redistribution redistribution only utilize current IP routing tables, it absorbs route entries of one specific routing protocol (as well as connected subnet of the interface with the specific routing protocol enabled) and insert them into another routing protocol with default or customized metric. issues with multipoint redistribution between same routing protocol the router …

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