08-31-2018 01:19 PM
Hello Cisco Gurus,
Can you please help me understand why I need an IP route as well as a Routing protocol? Let's say I only need one, but is it better to have both?
Thanks in advance!
Solved! Go to Solution.
09-01-2018 11:41 AM
The question in the original post is basically asking for comparison of static routing vs dynamic routing. We can make some generalizations about both of them.
Static Routing pro
simple to implement and simple to support
does not consume bandwidth for routing updates
does not consume memory for tables to store results of updates
does not consume cpu cycles to process updates
Static Routing con
does not react to changes in network topology and requires manual intervention to adjust to changes in topology
requires manual entry of every route in the network on every router in the network, so scaling to support larger networks is a challenge
Dynamic routing pro
does react dynamically to changes in topology
when there are multiple paths toward the destination can choose the optimum path
can advertise to all other routers in the routing domain about locally available paths
does scale more easily to support larger networks
Dynamic routing con
does consume bandwidth for advertisements
does consume memory to store information learned from other routers
does consume cpu cycles to process routing updates
has more sophisticated logic and can require more skilled operators to support
can be a challenge when some devices in a network do support a particular routing protocol while other devices in that network do not support that protocol
Having made these points choosing the most appropriate alternative really depends on an accurate understanding of the local environment, topology, and what are the real requirements for the network.
HTH
Rick
08-31-2018 01:52 PM
Depends on your requirement, with basic route you can use static route.
If you have dynamic routing requirement in the network, you need routing protocol configuration required.
08-31-2018 02:17 PM
Hello,
in addition to the other posts, it all depends on the size of your network. If you have only one router, a static default route is usually sufficient, and also more economic, since routing protocols use CPU and memory.
Below is a good article and when and where to use both:
Where to use static and where to use dynamic routing?
https://www.grandmetric.com/2017/08/25/where-to-use-static-and-where-to-use-dynamic-routing/
08-31-2018 02:39 PM
Hello
You'll probably require both in a scenario lets say --
when your running dynamic routing and a network which is being advertised by this IGP is specifying a different path to what you want your rtr to take so in this case you could specify a more specific longer match on this network in a form of a static route which will take precedence over the igp advertised route.
09-01-2018 11:41 AM
The question in the original post is basically asking for comparison of static routing vs dynamic routing. We can make some generalizations about both of them.
Static Routing pro
simple to implement and simple to support
does not consume bandwidth for routing updates
does not consume memory for tables to store results of updates
does not consume cpu cycles to process updates
Static Routing con
does not react to changes in network topology and requires manual intervention to adjust to changes in topology
requires manual entry of every route in the network on every router in the network, so scaling to support larger networks is a challenge
Dynamic routing pro
does react dynamically to changes in topology
when there are multiple paths toward the destination can choose the optimum path
can advertise to all other routers in the routing domain about locally available paths
does scale more easily to support larger networks
Dynamic routing con
does consume bandwidth for advertisements
does consume memory to store information learned from other routers
does consume cpu cycles to process routing updates
has more sophisticated logic and can require more skilled operators to support
can be a challenge when some devices in a network do support a particular routing protocol while other devices in that network do not support that protocol
Having made these points choosing the most appropriate alternative really depends on an accurate understanding of the local environment, topology, and what are the real requirements for the network.
HTH
Rick
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