2. IPv6 Routing Protocols

8/10/2019 2. IPv6 Routing Protocols

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IPv6 Routing Protocols


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IPv6 Routing Protocols

IPv6 routing types: Static RIPng (RFC 2080) OSPFv3 (RFC 2740) IS-IS for IPv6

MP-BGP4 (RFC 2545/2858) EIGRP for IPv6

ipv6 unicast-routing command is required toenable IPv6 before any routing protocol configured.


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IPv6 StaticRoute


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IPv6 Static Route


Router(config)# ipv6 route ipv6-prefix/ipv6-mask { ipv6-address | exit-intf }

Displaying IPv6 RoutesRouter#show ipv6 route


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Configure a Next-hop Static IPv6 Route



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Configure Directly Connected Static IPv6 Route



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Configure a Fully Specified Static IPv6 Route



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Default Static IPv6 Route


Router(config)# ipv6 route ::/0 { ipv6-

address | interface-type interface-number[ ipv6-address ]} [ administrative-distance ]


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RIPng


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RIPng

Same as IPv4: Distance-vector, radius of 15 hops, split-horizon,and poison reverse

Based on RIPv2 Updated features for IPv6:

IPv6 prefix, next-hop IPv6 address Uses the multicast group FF02::9, the all-rip-

routers multicast group, as the destination addressfor RIP updates Uses IPv6 for transport Named RIPng


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Configuring RIPng

R1(config)# ipv6 router rip RIP-AS


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Verifying Route on R1



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EIGRP forIPv6


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EIGRP for IPv6

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EIGRP for IPv4 vs. IPv6


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Comparing EIGRP for IPv4 and IPv6



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IPv6 Link-local Addresses



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Configuring EIGRP for IPv6



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Configuring the EIGRP for IPv6 Routing Process


Router(config)# ipv6 router eigrp autonomous-system

Ex : Router(config)# ipv6 router eigrp 2


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Enable EIGRP for IPv6 on an interface


Router(config-if)# ipv6 eigrp autonomous-system


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Verifying EIGRP for IPv6: Examining Neighbors



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show ip protocols Command



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Examining R1s IPv6 routing table



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OSPFv3


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OSPF Version 3 (OSPFv3) (RFC 2740)

Similar to OSPFv2 for IPv4: Same mechanisms, but a major rewrite of theinternals of the protocol

Updated features for IPv6: Every IPv4-specific semantic is removed Carry IPv6 addresses Link-local addresses used as source IPv6 transport

OSPF for IPv6 is currently an IETF proposedstandard


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OSPFv2 vs. OSPFv3 Data Structures



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Differences Between OSPFv2 and OSPFv3



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Similarities Between OSPFv2 to OSPFv3



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Link-Local Addresses



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OSPFv3 Network Topology



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Steps to configure OSPFv3



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Configuring the OSPFv3 Router ID

Router(config)# ipv6 unicast-routing

Router(config)# ipv6 router ospf 10

Router(config-router)# router-id 1.1.1.1



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Enabling OSPFv3 on Interfaces


Step Command or Action Purpose

1Router(config)#interface typenumber Specifies an interface type and number, andplaces the router in interface configuration

mode.

2

Router(config-if)#ipv6 addressaddress/prefix-length [eui-64]

Configures an IPv6 address for an interfaceand enables IPv6 processing on the interface.The eui-64 parameter forces the router tocomplete the addresses low -order 64-bits by

using an EUI-64 interface ID.

3Router(config-if)#ipv6 ospf

process-id area area-id [instanceinstance-id ]

Enables OSPF for IPv6 on an interface.

4Router(config-if)#router ospf

priority priority number Priority number is used in the designatedrouter election.

5Router(config-if)#router ospf costcost

The cost of sending a packet on the interface,expressed in the link state metric.

R1(config)# interface Gi0/0

R1(config)# ipv6 ospf 10 area 0

R1(config)# interface s0/0/0

R1(config)# ipv6 ospf 10 area 0


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Verify OSPFv3 Neighbors



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Verify the IPv6 Routing Table



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Configuring Multiarea OSPFv3



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LSA Overview

LSA FunctionCode LSA Type

Router-LSA 1 Ox2001

Network-LSA 2 Ox2002

Inter-Area-Prefix-LXA 3 Ox2003

Inter-Area-Router-LSA 4 Ox2004

AS-External-LSA 5 Ox4005

Group-Membership-LSA 6 Ox2006Type-7-LSA 7 Ox2007

Link-LSA 8 Ox2008

Intra-Area-Prefix-LSA 9 Ox2009New

Renamed


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Larger Address Space Enables Address Aggregation

Aggregation of prefixes announced in the global routingtable

Efficient and scalable routing

Improved bandwidth and functionality for user traffic


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OSPFv3 Multi-Area Topology



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Configure OSPFv3 on R1


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Verify Multiarea OSPFv3



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Verify Multiarea OSPFv3 (conn)



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Summary

RIP, EIGRP, IS-IS, BGP, and OSPF support IPv6. OSPFv3 is OSPF for IPv6. Most of the algorithms of OSPFv2 are the same in

OSPFv3.

There are two new LSAs in IPv6: LSA type 8 and LSAtype 9. The router LSA and the network LSA do notcarry IPv6 addresses.

Configuring OSPFv3 requires knowledge of IPv6. There are Cisco IOS software configuration

commands for OSPFv3 to support all of thecapabilities of OSPFv3.

Numerous OSPFv3 IOS show commands support theverification of OSPFv3 configurations.


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Documents

2. IPv6 Routing Protocols