IPv6 Routing Protocol Configurations

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Static Routing

Command Description
ipv6 route ipv6-prefix/prefix-length

{ipv6-address | interface-type interface-number

[ipv6-address]} [administrative-distance]

[administrative-multicast-distance | unicast |

multicast] [tag tag]


Example:

Router(config)# ipv6 route ::/0 serial 2/0

Configures a static IPv6 route
  • A static default IPv6 route is being configured on a

serial interface.

  • See the syntax examples that immediately follow this

table for specific uses of the ipv6 route command for

configuring static routes.

Summary Steps

  1. enable
  2. configure terminal
  3. ipv6 route ipv6-prefix/prefix-length {ipv6-address | interface-type interface-number

[ipv6-address]} [administrative-distance] [administrative-multicast-distance | unicast | multicast] [tag tag]


RIPng

Command Description
ipv6 unicast-routing


Example: Router(config)# ipv6 unicast-routing

Enables the forwarding of IPv6 unicast datagrams
ipv6 rip name enable


Example: Router(config-if)# ipv6 rip process1 enable

Enables the specified IPv6 RIP routing process on an

interface

maximum-paths number-paths


Example: Router(config-router)# maximum-paths 1

(Optional) Defines the maximum number of equal-cost

routes that IPv6 RIP can support

  • The number-paths argument is an integer from 1 to 64.

The default for RIP is four paths.

ipv6 router rip word


Example: Router(config)# ipv6 router rip process1

Configures an IPv6 RIP routing process and enters router

configuration mode for the IPv6 RIP routing process.

  • Use the word argument to identify a specific IPv6 RIP

routing process

ipv6 rip name default-information {only \

originate} [metric metric-value]


Example: Router(config-if)# ipv6 rip process1 default-information originate

(Optional) Originates the IPv6 default route (::/0) into the

specified RIP routing process updates sent out of the specified interface.

Summary Steps

  1. enable
  2. configure terminal
  3. ipv6 router rip word
  4. maximum-paths number-paths
  5. exit
  6. interface type number
  7. ipv6 rip name default-information {only | originate} [metric metric-value]


IS-IS

Command Description
router isis area-tag

Example: Router(config)# router isis area2

Enables IS-IS for the specified IS-IS routing process, and

enters router configuration mode.

net network-entity-title

Example: Router(config-router)# net 49.0001.0000.0000.000c.00

Configures an IS-IS network entity title (NET) for the

routing process.

ipv6 router isis area-name

Example: Router(config-if)# ipv6 router isis area2

Enables the specified IPv6 IS-IS routing process on an

interface. configuration mode

Summary Steps

  1. enable
  2. configure terminal
  3. router isis area-tag
  4. net network-entity-title
  5. exit
  6. interface type number
  7. ipv6 address {ipv6-address/prefix-length | prefix-name sub-bits/prefix-length}
  8. ipv6 router isis area-name


OSPFv3

Command Description
router ospfv3 [process-id]


Example: Router(config)# router ospfv3 1

Enables OSPFv3 router configuration mode for the IPv4 or

IPv6 address family

nssa | stub]


Example: Router(config-router)# area 1

Configures the OSPFv3 area
auto-cost reference-bandwidth Mbps


Example: Router(config-router)# auto-cost reference-bandwidth 1000

Controls the reference value OSPFv3 uses when calculating

metrics for interfaces in an IPv4 OSPFv3 process.

bfd all-interfaces


Example: Router(config-router)# bfd all-interfaces

Enables BFD for an OSPFv3 routing process

virtual-link router-id]} [default-information

originate [always | metric | metric-type |

route-map] | distance | distribute-list

prefix-list prefix-list-name {in | out}

[interface] | maximum-paths paths |

redistribute protocol | summary-prefix

ipv6-prefix]


Example: Router(config-router)# default area 1

Returns an OSPFv3 parameter to its default value
ignore lsa mospf


Example: Router(config-router)# ignore lsa mospf

Suppresses the sending of syslog messages when the router

receives LSA Type 6 multicast OSPFv3 packets, which are unsupported.

interface-id snmp-if-index


Example: Router(config-router)# interface-id

snmp-if-index

Configures OSPFv3 interfaces with Simple Network

Management Protocol (SNMP) MIB-II interface Index

(ifIndex) identification numbers in IPv4 and IPv6.

log-adjacency-changes [detail]


Example: Router(config-router)# log-adjacency-changes

Configures the router to send a syslog message when an

OSPFv3 neighbor goes up or down.

passive-interface [default \ interface-type

interface-number]


Example: Router(config-router)# passive-interface default

Suppresses sending routing updates on an interface when

using an IPv4 OSPFv3 process.

queue-depth {hello \ update} {queue-size \

unlimited}


Example: Router(config-router)# queue-depth update 1500

Configures the number of incoming packets that the IPv4

OSPFv3 process can keep in its queue.

Summary Steps

1. enable

2. configure terminal

3. router ospfv3 [process-id]

4. area area-ID [default-cost | nssa | stub]

5. auto-cost reference-bandwidth Mbps

6. bfd all-interfaces

7. default {area area-ID [range ipv6-prefix | virtual-link router-id]} [default-information originate [always | metric | metric-type | route-map] | distance | distribute-list prefix-list prefix-list-name {in | out} [interface] | maximum-paths paths | redistribute protocol | summary-prefix ipv6-prefix]

8. ignore lsa mospf

9. interface-id snmp-if-index

10. log-adjacency-changes [detail]

11. passive-interface [default | interface-type interface-number]

12. queue-depth {hello | update} {queue-size | unlimited}

13. router-id {router-id}


EIGRP

Command Description
ipv6 unicast-routing


Example: Router(config)# ipv6 unicast-routing

Enables the forwarding of IPv6 unicast datagrams
ipv6 eigrp as-number


Example: Router(config-if)# ipv6 eigrp 1

Enables EIGRP for IPv6 on a specified interface
ipv6 router eigrp as-number


Example: Router(config-if)# ipv6 router eigrp 1

Enters router configuration mode and creates an EIGRP

IPv6 routing process

show ipv6 eigrp [as-number] interfaces [type

number] [detail]


Example: Router# show ipv6 eigrp interfaces

Displays information about interfaces configured for

EIGRP for IPv6.

Summary Steps

  1. enable
  2. configure terminal
  3. ipv6 unicast-routing
  4. interface type number
  5. no shut
  6. ipv6 enable
  7. ipv6 eigrp as-number
  8. ipv6 router eigrp as-number
  9. eigrp router-id ip-address
  10. exit
  11. show ipv6 eigrp [as-number] interfaces [type number] [detail]


Troubleshooting IPv6

Command Description
clear ipv6 rip Deletes routes from the IPv6 RIP routing table and,

if installed, routes in the IPv6 routing table

clear ipv6 route * Deletes all routes from the IPv6 routing table
clear ipv6 route ipv6 address Clears this specific route from the IPv6 routing

table

clear ipv6 traffic Resets IPv6 traffic counters
debug ipv6 packet Displays debug messages for IPv6 packets
debug ipv6 rip Displays debug messages for IPv6 RIP routing

transactions

debug ipv6 routing Displays debug messages for IPv6 routing table

updates and route cache updates

show ipv6 interface Displays the status of interfaces configured for

IPv6

show ipv6 interface brief Displays a summarized status of interfaces

configured for IPv6

show ipv6 neighbors Displays IPv6 neighbor discovery cache information
show ipv6 protocols Displays the parameters and current state of the

active IPv6 routing protocol processes

show ipv6 rip Displays the parameters and current state of active

IPv6 routing protocol processes

show ipv6 route Displays the current IPv6 routing table
show ipv6 route summary Displays a summarized form of the current IPv6 routing

table

show ipv6 routers Displays IPv6 router advertisement information received

from other routers

show ipv6 static Displays only static IPv6 routes installed in the

routing table

show ipv6 static ipv6 address Displays only static route information about the specific

address given

show ipv6 static interface interface Displays only static route information with the specified

interface as the outgoing interface

show ipv6 static detail Displays a more detailed entry for IPv6 static routes
show ipv6 traffic Displays statistics about IPv6 traffic
show ipv6 tunnel Displays IPv6 tunnel information


References