Module 4 Lesson 1: Routing with RIPng protocol

Module 4 Lesson 1: Routing with RIPng protocol

Objectives:

Ø Upon completion of this lesson , you will be able to :

Ø Describe how the RIPng routing protocols is supported in IPv6

Ø Describe the enhancements made to RIPng to support IPv6

Ø Configure the RIP protocol on Cisco routers

1 Lesson outline

Ø RIPng for IPv6

Ø Cisco IOS RIPng Commands

Ø Cisco IOS RIPng configuration example

2 RIPng for IPv6

Same as IPv4

Ø Distance-vector

Ø Radius of 15 hops

Ø Split-horizon , poison reverse and so on

Ø UDP port 521

Ø Based on RIP-2

3 RIPng for IPv6

Updated features for IPv6

Ø IPv6 prefix , next-hop IPv6 link-local address, next-hop interface

Ø Uses the multicast group address FF02::9 , the all-rip-routers multicast group ,as the destination address for RIP updates

Ø Use IPv6 for transport

Ø Named RIPng

 

4 Cisco IOS RIPng Commands

Ø ipv6 router rip àCreate and enter RIP router submode

Ø redistribute static |bgp|rip àRedistribute routes from other routing processes

Ø ipv6 rip enableàconfigure RIP on an interface

Ø ipv6 rip default-information originateàoriginate the default route out an interface

Ø show ipv6 ripàdisplay status of the various RIP processes

Ø show ipv6 rip databaseàdisplay the RIP database

Ø show ipv6 route ripàshow RIP routes in the IPv6 route table

Ø debug ipv6 ripàdisplay RIP packets sent and received

5 Cisco IOS RIPng configuration Example

5.1 RIPng example map

::0--àRouter2(Eth0)---LAN1—(Eth0)Router1(Eth1)—LAN2

5.2 IP address

Devices name	Interface	IP address	Remark
Router2	Eth0	Fe80::260:3eff:fe47:1530
LAN1		2001:db8:1:1::/64
Router1	Eth0
Router1	Eth1
LAN2		2001:db8:1:2::/64

 

5.3 configure the devices

Router2#

interface  eth0

ipv6 address 2001:db8:1:1::/64 eui-64

ipv6 rip RTO enable

ipv6 rip RTO default-information originate

debug ipv6 rip

Router2# debug ipv6 rip

RIPng: Sending multicast update on Ethernet0 for RT0

       src=FE80::260:3eff:fe47:1530

       dst=FF02::9 (Ethernet0)

       sport=521, dport=521, length=32

       command=2, version=1, mbz=0, #rte=1

       tag=0, metric=1, prefix=::/0

Note:

the example shows a network of two routers, the upper router is connected to the default network , the screen text is from the upper router, called Router2, RTO is a tag to identify the RIP process, for the first Ethernet interface, RIP is enabled on that interface (ipv6 rip RTO enable).

There is many ways to configure default routers, in the first Ethernet interface context, ipv6 rip default-information originate enables the advertisement of the default route with the origin of router2

The debug ipv6 rip command helps debugging , this screen output show an RIP update being sent on the first Ethernet interface, the source address is the link-local address on that network, this right part of the link-local address is based on the EUI-64 representation of the linkl-layer address, the destination of the RIP advertisement packet is the multicast group of all-rip-routers, the debug output shows that a default route with a metric of one is sent by the router.

 

Route1

interface  eth0

ipv6 address 2001:db8:1:1::/64 eui-64

ipv6 rip RTO enable

interface eth1

ipv6 address 2001:db8:1:2::/64 eui-64

ipv6 rip RTO enable

Note:

The example shows a two router  portion of a larger network ,the lower router is connected to two internal LANs, the screen text is from the lower router, called Router1, it shows that RIP is enabled on both Ethernet interface .

6 Summary

In this lesson , you learned to :

Ø Describe how RIPng routing protocol is support IPv6

Ø Describe the enhancements made to RIPng to support IPv6

Ø Configure the RIP protocol on Cisco routers