Characteristics of dynamic IP routing protocols

This post describes the most important characteristics of various Dynamic Routing Protocols that are used in Cisco IOS routers.

Characteristics of dynamic IP Routing Protocols

RIPv1

Distance Vector Protocol.
Suitable for small to medium networks (Supports maximum hop count of 15).
Metric for best path is Hop count
Slow convergence speed.
Supports Classful Routing(Don’t Supports CIDR and VLSM)
Open Standard protocol, supports multi-vendor networks
Updates with Broadcast IP 255.255.255.255
Timers: Hello Time 30sec, Hold Time 180sec & Flush Time 240sec
Administrative distance: 120.
Don’t support Authentication.
Bellman-Ford algorithm is used to determine the shortest path.

RIPv2

Distance Vector Protocol.
Suitable for small to medium networks (Supports maximum hop count of 16)
Metric for best path is Hop count
Slow convergence speed.
Supports VLSM.
Supports CIDR.
Supports Authentication
Open Standard protocol, supports multi-vendor networks.
Timers: Hello Time 30sec, Hold Time 180sec & Flush Time 240sec
Multicast address for updates: 224.0.0.9
Administrative distance: 120.

Bellman-Ford algorithm is used to determine the shortest path.

EIGRP

Hybrid Protocol(Enhanced Distance Vector Protocol).
Metrics for best path are bandwidth, Delay, Load, Reliability andMTU
Suitable for routing in large networks.
Very high speed of convergence.
Supports VLSM.
Supports CIDR.
Cisco proprietary.
Multicast address for updates: 224.0.0.10
Supports maximum hop count of 255(Default 100)
Timers: Hello Time 5sec, Hold Time 15sec
Administrative Distance: internal 90, external 170 and Summarized 5.
Diffusing Update Algorithm (DUAL) is used to determine the shortest path

OSPFv2

Link state protocol.
Metric for best path is 10^8/Bandwidth
Suitable for routing in large networks.
High convergence speed.
Supports VLSM.
Supports CIDR.
Open Standard (supports multi-vendor networks.)
Multicast address for updates: From DR to Other 224.0.0.5  and Other to DR 224.0.0.6
Timers: Hello Time 10sec, Hold Time 40sec.
Administrative distance: 110.
Dijkstra algorithm is used to determine the shortest/best path.

IS-IS

Link state protocol.
Suitable for routing in large networks.
High convergence speed.
Supports VLSM.
Supports CIDR.
OSI standard (it supports multi-vendor networks.)
Timers: Hello Time 10sec, Hold Time 30sec.
Administrative distance: 115.
SPF Dijkstra algorithm is used to determine the shortest/best path.

BGPv4

Path vector protocol.
Suitable for the Internet (between Autonomous Systems or within ISP networks).
Speed of convergence: low.
Supports VLSM.
Supports CIDR.
Open Standard (supports multi-vendor networks.)
Timers: Keepalive Time 60sec, Hold Time 180sec.
Updates unicast.
Administrative Distance: 20 eBGP, iBGP 200.
Difficulty to Administer: High.

 

Filed Under: Routing General

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  1. vasya says:

    Hi ! very nicely covered all the points about all dynamic IP routing protocols which are supported by Cisco Router.

    Thanks 🙂

  2. Aubree says:

    You got great points here on complete dynamic IP routing protocols , that’s why I always love checking out your blog.

  3. Adino says:

    Keep working ,impressive job! this post have complete properties of all dynamic IP routing protocols.

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