Cisco CCNA OSPF IPV6 Configuration

31 Aug 2016

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Cisco CCNA OSPF IPV6 Configuration

Now I will do small Lab:

R4=10.10.10.4
R10=10.10.10.10 connected via LAN link

also I will have IPV6 as follow:

r4 f0/0=2001:4444::4/64
r10 f0/0=2001:4444::10/64

Here are the configuration for Basic Router

Hint: always start with IPV6?

R4(config-if)#ipv6 add

R4(config-if)#ipv6 address ?

WORD General prefix name

X:X:X:X::X IPv6 link-local address

X:X:X:X::X/<0-128> IPv6 prefix

autoconfig Obtain address using autoconfiguration

R4(config-if)#ipv6 address 2001:4444::4/64

R4(config-if)#

Continue

Hint: same command work on Ipv6R1#show ip int brief

show ipv6 int brief

show ip route

show ipv6 route

show ip ospf int f0/0

show ipv6 ospf int f0/0

Here is my show ipv6 int brief:

R4#show ipv6 int brief

FastEthernet0/0 [up/up]

FE80::21C:58FF:FE7D:DEC0

2001:4444::4

FastEthernet0/1 [administratively down/down]

unassigned

Serial0/0/0 [up/up]

unassigned

Serial0/0/0.41 [up/up]

unassigned

Serial0/1/0 [administratively down/down]

unassigned

Loopback0 [up/up]

unassigned

As we see the link-local address which was created automatically by inserting

FFFE in the middle of MAC address

Let’s look at mac of int f0/0

R4#show int f0/0

FastEthernet0/0 is up, line protocol is up

Hardware is MV96340 Ethernet, address is 001c.587d.dec0 (bia 001c.587d.dec0)

Internet address is 140.101.108.4/22

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

As we see my MAC address is:

001c.587d.dec0

001c.58 7d.dec0

Here is my link-local:
FE80::21C:58FF:FE7D:DEC0

Here is another show commands:

R4#show ipv6 int f0/0

FastEthernet0/0 is up, line protocol is up

IPv6 is enabled, link-local address is FE80::21C:58FF:FE7D:DEC0

Global unicast address(es):

2001:4444::4, subnet is 2001:4444::/64

Joined group address(es):

FF02::1

FF02::2

FF02::1:FF00:4

FF02::1:FF7D:DEC0

MTU is 1500 bytes

ICMP error messages limited to one every 100 milliseconds

ICMP redirects are enabled

ND DAD is enabled, number of DAD attempts: 1

ND reachable time is 30000 milliseconds

R4#

Let’s ping each other:

R4#ping 2001:4444::4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2001:4444::4, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/0 ms

R4#

R4#ping 2001:4444::10

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2001:4444::10, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/0 ms

R4#

Here is my neighbors:

R4#show ipv6 neighbors

IPv6 Address Age Link-layer Addr State Interface

FE80::21A:6CFF:FEA1:56F8 1 001a.6ca1.56f8 DELAY Fa0/0

2001:4444::10 0 001a.6ca1.56f8 REACH Fa0/0

R4#

Also I can ping the link-local address:

R4#ping FE80::21A:6CFF:FEA1:56F8

Output Interface: FastEthernet0/0

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to FE80::21A:6CFF:FEA1:56F8, timeout is 2 seconds

Packet sent with a source address of FE80::21C:58FF:FE7D:DEC0

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms

R4#

Now I will configure 4 loopback address on R10; then I will

Advertise them in OSPF; then when I go to R4#show ipv6 route I should see all

Those loopback address

lo1 FEC0:1000::1/128

lo2 FEC0:1000::2/128

lo3 FEC0:1000::3/128

lo4 FEC0:1000::4/128

Now I will go and configure OSPF inside the IPv6

Hint: For IPV6 environment; in order to advertise it; you do not go under OSPF section; you will go under int lo1 and etc., and advertised it.

Hint: you must enable ipv6 unicast-routing

Hint: always always remember use ipv6 ?

R4(config)#

R4(config)#ipv

R4(config)#ipv6 ?

access-list Configure access lists

cef Cisco Express Forwarding for IPv6

dhcp Configure IPv6 DHCP

flow-aggregation Configure flow aggregation

flow-cache Configure netflow cache parameters

flow-capture Capture additional netflow information

flow-export Specify host/port to send flow statistics

general-prefix Configure a general IPv6 prefix

hop-limit Configure hop count limit

host Configure static hostnames

icmp Configure ICMP parameters

inspect Context-based Access Control Engine

local Specify local options

mfib Multicast Forwarding

mobile Mobile IPv6

multicast-routing Enable IPv6 multicast

nat NAT-PT Configuration commands

neighbor Neighbor

ospf OSPF

pim Configure Protocol Independent Multicast

port-map Port to application mapping (PAM) configuration commands

prefix-list Build a prefix list

route Configure static routes

router Enable an IPV6 routing process

source-route Process packets with source routing header options

unicast-routing Enable unicast routing

R4(config)#ipv6 rout

R4(config)#ipv6 router ?

ospf Open Shortest Path First (OSPF)

rip IPv6 Routing Information Protocol (RIPv6)

R4(config)#ipv6 router os

R4(config)#ipv6 router ospf ?

<1-65535> Process ID

R4(config)#ipv6 router ospf 110 ?

<cr>

R4(config)#ipv6 router ospf 110

% IPv6 routing not enabled

R4(config)#

Hint: as we see I need to have ipv6 unicast-routing

R4(config)#ipv6 uni

R4(config)#ipv6 unicast-routing

R4(config)#ipv6 router ospf 110

R4(config-rtr)#?

Hint: in order to advertise your network; you must go Under

int f0/0 ipv6 ?

R4(config)#

R4(config)#int f0/0

R4(config-if)#ipc

R4(config-if)#ip

R4(config-if)#ipv

R4(config-if)#ipv6 ?

IPv6 interface subcommands:

address Configure IPv6 address on interface

cef Cisco Express Forwarding for IPv6

dhcp IPv6 DHCP interface subcommands

enable Enable IPv6 on interface

flow Enable IPv6 Flow on the interface

inspect Apply inspect name

mfib Interface Specific MFIB Control

mld interface commands

mobile Mobile IPv6

mtu Set IPv6 Maximum Transmission Unit

multicast multicast

nat Enable IPv6 NAT on interface

nd IPv6 interface Neighbor Discovery subcommands

ospf OSPF interface commands

pim PIM interface commands

policy Enable IPv6 policy routing

redirects Enable sending of ICMP Redirect messages

rip Configure RIP routing protocol

router IPv6 Router interface commands

traffic-filter Access control list for packets

unnumbered Preferred interface for source address selection

verify Enable per packet validation

virtual-reassembly IPv6 Enable Virtual Fragment Reassembly

R4(config-if)#ipv6 ops

R4(config-if)#ipv6 os

R4(config-if)#ipv6 ospf ?

<1-65535> Process ID

authentication Enable authentication

cost Interface cost

database-filter Filter OSPF LSA during synchronization and flooding

dead-interval Interval after which a neighbor is declared dead

demand-circuit OSPF demand circuit

flood-reduction OSPF Flood Reduction

hello-interval Time between HELLO packets

mtu-ignore Ignores the MTU in DBD packets

neighbor OSPF neighbor

network Network type

priority Router priority

retransmit-interval Time between retransmitting lost link state

advertisements

transmit-delay Link state transmit delay

R10(config-if)#ipv6 ospf 110 ?

area Set the OSPF area ID

R10(config-if)#ipv6 ospf 110 are ~

R10(config-if)#ipv6 ospf 110 are

R10(config-if)#ipv6 ospf 110 area 0

AS SOON AS I DO THIS ; I SEE some activity in R4

R4#

*Feb 25 01:19:33.199: %OSPFv3-5-ADJCHG: Process 110, Nbr 140.101.170.14 on FastE

thernet0/0 from LOADING to FULL, Loading Done

R4#

Now i will go to R4# show ipv6 route

R4#show ipv6 route

IPv6 Routing Table – 8 entries

Codes: C – Connected, L – Local, S – Static, R – RIP, B – BGP

U – Per-user Static route

I1 – ISIS L1, I2 – ISIS L2, IA – ISIS interarea, IS – ISIS summary

O – OSPF intra, OI – OSPF inter, OE1 – OSPF ext 1, OE2 – OSPF ext 2

ON1 – OSPF NSSA ext 1, ON2 – OSPF NSSA ext 2

C 2001:4444::/64 [0/0]

via ::, FastEthernet0/0

L 2001:4444::4/128 [0/0]

via ::, FastEthernet0/0

L FE80::/10 [0/0]

via ::, Null0

O FEC0:1000::1/128 [110/1]

via FE80::21A:6CFF:FEA1:56F8, FastEthernet0/0

O FEC0:1000::2/128 [110/1]

via FE80::21A:6CFF:FEA1:56F8, FastEthernet0/0

O FEC0:1000::3/128 [110/1]

via FE80::21A:6CFF:FEA1:56F8, FastEthernet0/0

O FEC0:1000::4/128 [110/1]

via FE80::21A:6CFF:FEA1:56F8, FastEthernet0/0

L FF00::/8 [0/0]

via ::, Null0

R4#

As we see I see all the OPSF so life is good

via ::, Null0

R4#ping FEC0:1000::1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to FEC0:1000::1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms

R4#ping FEC0:1000::2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to FEC0:1000::2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms

R4#ping FEC0:1000::3

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to FEC0:1000::3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms

R4#ping FEC0:1000::4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to FEC0:1000::4, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms

R4#

As we i can ping all the loopback address

Let’s look at some show commands:

R10#show ipv6 ospf neighbor

Neighbor ID	Pri	State	Dead Time	Interface ID	Interface
4.4.4.4	1	FULL/DR	00:00:34	4	FastEthernet0/

R10#

Here is R4#

R4#show ipv6 ospf neighbor

Neighbor ID	Pri	State	Dead Time	Interface ID	Interface
140.101.170.14	1	FULL/BDR	00:00:31	4	FastEthernet0/

R4#

As we see the router-ID for the R10 = 140.101.170.14 ( it picked the highest lookback address)

I can also hard code the route-Id

You must do it under the:

R10#

ipv6 router ospf 110

R10(config)#ipv6 router ospf 110

R10(config-rtr)#ropt

R10(config-rtr)#rooy

R10(config-rtr)#ro

R10(config-rtr)#router-id 10.10.10.10

Reload or use “clear ipv6 ospf process” command, for this to take effect

R10(config-rtr)#

As we see in order to take it I need to clear it

R10#clear ipv6 ospf pro

R10#clear ipv6 ospf process

Reset ALL OSPF processes? [no]: y

R10#

Let’s check on R4

R4#show ipv6 ospf neighbor

Neighbor ID	Pri	State	Dead Time	Interface ID	Interface
10.10.10.10	1	FULL/BDR	00:00:37	4	FastEthernet0/0

R4#

As we see in above R4 is DR since I do not see myself

Remember we had this:

R1#show ip ospf int f0/0

Same commands in ipv6:

R4#show ipv6 ospf int f0/0

FastEthernet0/0 is up, line protocol is up

Link Local Address FE80::21C:58FF:FE7D:DEC0, Interface ID 4

Area 0, Process ID 110, Instance ID 0, Router ID 4.4.4.4

Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 4.4.4.4, local address FE80::21C:58FF:FE7D:DEC0

Backup Designated router (ID) 10.10.10.10, local address FE80::21A:6CFF:FEA1:5

6F8

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

Hello due in 00:00:01

Index 1/1/1, flood queue length 0

Next 0x0(0)/0x0(0)/0x0(0)

Last flood scan length is 1, maximum is 4

Last flood scan time is 0 msec, maximum is 0 msec

Neighbor Count is 1, Adjacent neighbor count is 1

Adjacent with neighbor 10.10.10.10 (Backup Designated Router)

Suppress hello for 0 neighbor(s)

R4#

As we see in above R4# Dr and router-id 4.4.4.4

network =brodcast

BDR=R10

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