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IPv6 Routing Protocols


IPv4 and IPv6 Protocol Comparison


As you know in IPv4, there are two types of routing protocols . These routing protocol types are IGP and EGP. With IPv6 these types are still exist but the routing protocols’ versions will change.

Routing Protocols Used In IPv4


In IPv4, as IGP, we can use the below routing protocols :

• RIPv2 (Routing Information Protocol)
• IGRP (Interior Gateway Routing Protocol)
• EIGRP (Enhanced Interior Gateway Routing Protocol)
• OSPFv2 (Open Shortest Path First version 2)
• ISIS (Intermediate System to Intermediate System)

Again in IPv4, as EGP, we can use only,

• BGPv4 (Border Gateway Protocol version 4).

The previous EGP protocol named also EGP is not used now already.

Routing Protocols Used In IPv6


Until now, we have talked about the IPv4 versions of these protocols. In this article we will talk about IPv6 versions. In IPv6, RIP will still exist , but as RIPng (RIP Next Generation). We will again talk about OSPF, but as OSPFv3.

Now, lets have a look at the IPv6 routing protocols and their changed names:

In IPv6, as IGP, we can use the below routing protocools with their changed versions:

• RIPng (RIP Next Generation)
• OSPFv3
• EIGRP for IPv6
• Integrated IS-IS for IPv6

Again in IPv6, as EGP, we can use only,

• MP-BGP4

Below, you can see the summarization of IPv4-IPv6 Routing Protocol Transition.

ipv4 ipv6 routing protocols transition

Generally, new protocols have the properties of their previous counterparts. With IPv6, there a re only some additional features.

Beside this, there is also static routing in IPv6. We have talked about it in the previous articles.
As an important note, here, I d like to emphasize one point. Like IPv4, IPv6 will also use “the longest prefix match” algorithm for routing.

Now, let’s check these protocols closer and see the similarities and the differences from the previous versions. But before this, let’s remeber IPv4 static routing and default route. And learn how to write static route and default route in IPv6

IPv6 Static And Default Routing

Static Routing


As you know, static route is the route that you manually define on the router. To define a static route, you will first write the prefix OR the network you will reach and then, the next hop to reach that network.

In IPv4, you are writing static routes with IPv4 addresses. In IPv6, there is only one change. You will do this static routes with IPv6 addresses. Your destination network and next hop will be IPv6.

For example:
Let’s write a static route to 2001:ABC::/32 network through the interface ip 2001:ABC:1111:2222::1. And let’s use a manully defined administrative distance 50.

Router(config)# ipv6 route 2001:ABC::/32 2001:ABC:1111:2222::1 50

ipv6 static route

Here, we have writen a static route to 2001:ABC::/32 network via next hop 2001:ABC:1111:2222::1 . And our static route has administartive distance value 50.

Default Routing


The Default Routing is a type of static routing. In default routing, you are defining a default destination, and every packet without a destination is going there.

In IPv4, you were using IPv4 address for default routing and default destination. In IPv6, you will use a IPv6 address as default routing and default destination. For the default route source IPv6 address you will use “::/0

For example:
Let’ s configure default route with the next hop 2001:ABC:33:44::1

Router(config)# ipv6 route ::/0 2001:ABC:33:44::1

ipv6 default route

Here, our default destation is 2001:ABC:33:44::1 according to above configuration.

IPv6 Routing Protocols…

IPv6 Routing Protocols – Part 1
IPv6 Routing Protocols – Part 2 (OSPFv3)
IPv6 Routing Protocols – Part 4 (RIPng)

You can find the other IPv6 articles below…

IPv6

IPv6 – Part 1 (IPv6 and IPv6 Addresses)
IPv6 – Part 2 (What does IPv6 bring?)
IPv6 – Part 3 (Address Types in IPv6)
IPv6 – Part 4 (Subnetting IPv6)

IPv6 Static Route Configuration Examples…

IPv6 Static Route Configuration on Cisco
IPv6 Static Route Configuration on Juniper

IPv4 and IPv6 Headers…

IPv4 and IPv6 Headers

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About the Author
Gokhan Kosem is a telecommunation and network engineer. His ambition to IP networks and end-to-end system installation made him to prepare this web-site. By sharing his experiences about various networking protocols beside different system installation experiences and Cisco, Juniper, Alcatel-Lucent devices configurations, he is aimed to be helpful for his collegues in all over the world. He is currently lives in Istanbul, Turkey.

2 comments for “IPv6 Routing Protocols – Part 1”

1

[…] Differences: • For IPv6 addresses, • OSPFv3 run per-link, not per-subnet, • Authentication method changes(with AH and ESP with IPv6), • Packet formation and LSA’s header format changes, • OSPFv 3 has 9 LSA types, two of them is new( Link LSA, Intra-Area Prefix LSA), • Separation of IP addressing from the calculation of the SPF tree, • All OSPFv3 adjacencies are formed using link-local addresses, • Removal of addressing semantics, • Addition of Flooding scope, • Explicit support for multiple instances per link, • Improved handling for unknown LSAs, • Manual router-id configuration need. IPv6 Routing Protocols – Part 1 […]

April 2nd, 2013 at 08:33
2
ben kld

I have problem ping between two routers olive junos VMware with inet6? please help !!!

May 13th, 2013 at 00:00

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