How does routing work with IPv6?

How does routing work with IPv6?

Routing in IPv6 is almost identical to IPv4 routing under CIDR. The only difference is the addresses are 128-bit IPv6 addresses instead of 32-bit IPv4 addresses. With very straightforward extensions, all of IPv4’s routing algorithms, such as OSPF, RIP, IDRP, IS-IS, can be used to route IPv6.

How is IPv6 summary address calculated?

Calculate IPv6 Network Addresses (2.4. 2.2)

1. List the network addresses (prefixes) and identify the part where the addresses differ.
2. Expand the IPv6 if it is abbreviated.
3. Convert the differing section from hex to binary.
4. Count the number of far left matching bits to determine the prefix length for the summary route.

What is route summarization with example?

Route summarization is a method where we create one summary route that represent multiple networks/subnets. It’s also called route aggregation or supernetting. Saves CPU cycles: less packets to process and smaller routing tables to work on. Stability: Prevents routing table instability due to flapping networks.

What is an IPv6 route?

Which are routing protocols that support IPv6?

IPv6 supports the following routing protocols: RIPng (RIP New Generation) OSPFv3. EIGRP for IPv6.

How do you calculate a summary route?

The summary route number is represented by the first IP address in the block, followed by a slash, followed by the number of common bits. As Figure 1-17 illustrates, the first 22 bits of the IP addresses from 172.16. 12.0 through 172.16. 15.255 are the same.

What is summarization in networking?

Route summarization — also known as route aggregation — is a method to minimize the number of routing tables in an IP network. It consolidates selected multiple routes into a single route advertisement. This differentiates it from flat routing, in which every routing table carries a unique entry for each route.

Why do we summarize routes?

Route summarization, or supernetting, is needed to reduce the number of routes that a router advertises to its neighbor. The more routes you have to advertise, the bigger the packet. The bigger the packet, the more bandwidth the update takes, reducing the bandwidth available to transfer data.

What is different between IPv6 routing table entries?

What is different between IPv6 routing table entries compared to IPv4 routing table entries? The selection of IPv6 routes is based on the shortest matching prefix, unlike IPv4 route selection which is based on the longest matching prefix. IPv6 does not use static routes to populate the routing table as used in IPv4.

What are two advantages of static routing over dynamic routing choose two?

Static routing requires very little knowledge of the network for correct implementation. Static routing uses fewer router resources than dynamic routing. Static routing is relatively easy to configure for large networks. Static routing is more secure because it does not advertise over the network.

How is IPv4 summary route similar to IPv6 summary route?

The calculation and configuration of an IPv6 summary static route is similar to the configuration of an IPv4 static summary route. Aside from the fact that IPv6 addresses are 128 bits long and written in hexadecimal, summarizing IPv6 addresses is actually similar to the summarization of IPv4 addresses.

Which is an example of a static route in IPv6?

For example, R1 is configured with a floating static route specifying an administrative distance of 130 to the R2 LAN. • If an IGP already has an entry in the IPv6 routing table to this LAN, then the static route would only appear in the routing table if the IGP entry was removed.

Which is the smallest mask in IPv6 route summarization?

In contradiction with IPv4, IPv6 generally takes the subnets from the network part. This implies the smallest mask is /64. 02-21-2011 10:53 AM 02-21-2011 10:53 AM As you have probably guessed, these three routes cannot be easily summarized. Customers generally receive a /48.

How to summarize 7, 8, 9 route summarization?

When summarizing 7, 8, 9, your summary automatically includes subnets 0 till 15. Your mask would become /76. In your example, the subnets actually are /80 in size so the notation using /64 is not correct. This would actually represent different host addresses in the same network because the first 64 bits are identical.