What you mean by RIP v1,v2,OSPF,IGRP,EIGRP?

ROUTING PROTOCOL

RIP V1: It is a simple distance vector protocol. It has been enhance with various techniques, including Split Horizon and Poison Reverse in order to enable it to perform better in complicated network

The longest path cannot exceed 15 hops.

RIP uses static metrics to compare routes.

ADMINISTRATIVE DISTANCE:120

METRIC:HOB COUNT

What you mean by RIP v2?

RIP V2: It added several new features.

External route tags.

Subnet masks

Next hop router addresses.

Authentication.

Multicast support.

METRIC:SAME AS RIP V1

Explain about OSPF?

OSPF: Open Shortest Path First is a dynamic routing protocol for use in Internt Protocol(IP networks).It is a link state routing protocols. It falls into the group of interior gateway protocols, operating within an autonomous system(AS). Link-State routing protocol that calls for the sending of link-state advertisements (LSAs) to all other routers within the same hierarchial area. Information on attached interfaces, metrics used, and other variables is included in OSPF LSAs. As OSPF routers accumulate link-state information, they use the SPF algorithm to calculate the shortest path to each node.

METRIC: COST=bandwidth/interface bandwidth

AD:110

Explain about EIGRP?

EIGRP: EIGRP is a Cisco proprietary routing protocol derived from IGRP. EIGRP can be called as hybrid protocol or an advanced distance-vector routing protocol, with optimizations to minimize both the routing instability incurred after topology changes, as well as the use of bandwidth and procession power in the router. Routers that support EIGRP will automatically redistribute route information to IGRP neighbors by converting the 32 bit EIGRP metric to the 24 bit IGRP metric. Most of the routing optimizations are based on the Diffusing update Algorithm(DUAL).

MERIC: Load, delay,bandwidth, reliability and MTU

Explain about IGRP?

IGRP:IGRP is a distance vector Interior Gateway Protocol(IGP). Distance vector routing protocols mathematically compare routes using some measurement of distance. This measurement is know as distance vector. Routers using a distance vector protocol must send all or a portion of their routing table in a routing-update message at regular intervals to each of their neighboring routers. As routing information proliferates through the network, routers can identify new destinations as they are added to the network, learn of failures in the network, and, most improtanly, calculate distances to all know destinations. IGRP uses a composite metric that is calculated by factoring weighted mathematical values for internetwork delay, bandwidth, reliability, and load. Network administrators can set the weighting factors for each of these metrics. Default metrics are Reliability and load.

Administrative Distance:100

MERIC: Load, delay,bandwidth, reliability and MTU

Monday, September 28, 2009