ospf-ipv6 summarization

LAB11: OSPF – IPv6

Disclaimer

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LAB 11: Diagram

Note: This Lab was developed on Cisco IOS Version15.2(4) M1 ADVENTERPRISEK9-M. 

LAB 11: IPv6 OSPF Summarization:

Task 1: Configure IPv6 OSPF Summarization 

• In the configuration mode of router configure 4 loopbacks with network address in sequence 

R1:

interface loopback 0

ipv6 address 11:0:0::1/64

exit

interface loopback 1 

ipv6 address 11:0:1::1/64

exit

interface loopback 2 

ipv6 address 11:0:2::1/64

exit

interface loopback 3 

ipv6 address 11:0:3::1/64

exit

• Verify routes on neighbor router routing table

R2#show ipv6 route

! (Shows router’s routing table and IPv4 routes entries)

 IPv6 Routing Table - default - 21 entries

Codes: C - Connected, L - Local, S - Static, U - Per-user Static route

       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP

       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea

       IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO

       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect

       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2

       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, l - LISP

O   11:0:1::1/128 [110/64]

     via FE80::A8BB:CCFF:FE00:100, Serial2/0

O   11:0:2::1/128 [110/64]

     via FE80::A8BB:CCFF:FE00:100, Serial2/0

O   11:0:3::1/128 [110/64]

     via FE80::A8BB:CCFF:FE00:100, Serial2/0

C   12::/64 [0/0]

     via Serial2/0, directly connected

L   12::A8BB:CCFF:FE00:200/128 [0/0]

     via Serial2/0, receive

C   22:0:1::/64 [0/0]

     via Loopback1, directly connected

L   22:0:1::2/128 [0/0]

     via Loopback1, receive

C   22:0:2::/64 [0/0]

     via Loopback1, receive

C   22:0:2::/64 [0/0]

     via Loopback2, directly connected

L   22:0:2::2/128 [0/0]

     via Loopback2, receive

C   22:0:3::/64 [0/0]

     via Loopback3, directly connected

L   22:0:3::2/128 [0/0]

     via Loopback3, receive

C   23::/64 [0/0]

     via Ethernet0/0, directly connected

L   23::A8BB:CCFF:FE00:200/128 [0/0]

     via Ethernet0/0, receive

O   33:0:1::3/128 [110/10]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

O   33:0:2::3/128 [110/10]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

O   33:0:3::3/128 [110/10]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  34::/64 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  44:0:1::4/128 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  44:0:2::4/128 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  44:0:3::4/128 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

L   FF00::/8 [0/0]

     via Null0, receive

• Summarize IPv6 OSPF routes on ABR router

! (In OSPF Summary is always done on Area Border Router (ABR))

R1:

telnet 12.0.0.2 

password: cisco

R2>enable

password: cisco

R2#show ipv6 ospf database

! (Shows details of OSPF database based on Area Perspective and LSA Perspective) 

OSPFv3 Router with ID (22.0.3.2) (Process ID 2)

                                      Router Link States (Area 0)

ADV Router       Age         Seq#        Fragment ID  Link count  Bits

 22.0.3.2        1421        0x80000002  0            1           B

 33.0.3.3        1422        0x80000002  0            1           B

                Net Link States (Area 0)

ADV Router       Age         Seq#        Link ID    Rtr count

 33.0.3.3        1422        0x80000001  3          2

                Inter Area Prefix Link States (Area 0)

ADV Router       Age         Seq#        Prefix

 22.0.3.2        1476        0x80000001  11:0:1::1/128

 22.0.3.2        1476        0x80000001  11:0:2::1/128

 22.0.3.2        1476        0x80000001  11:0:3::1/128

 22.0.3.2        1476        0x80000001  12::/64

 33.0.3.3        1451        0x80000001  34::/64

 33.0.3.3        1440        0x80000001  44:0:1::4/128

 33.0.3.3        1440        0x80000001  44:0:2::4/128

 33.0.3.3        1440        0x80000001  44:0:3::4/128

                Link (Type-8) Link States (Area 0)

ADV Router       Age         Seq#        Link ID    Interface

 22.0.3.2        1486        0x80000001  3          Et0/0

 33.0.3.3        1462        0x80000001  3          Et0/0

                Intra Area Prefix Link States (Area 0)

ADV Router       Age         Seq#        Link ID    Ref-lstype  Ref-LSID

 22.0.3.2        1421        0x80000002  0          0x2001      0

 33.0.3.3        1422        0x80000002  0          0x2001      0

 33.0.3.3        1422        0x80000001  3072       0x2002      3

                Router Link States (Area 1)

ADV Router       Age         Seq#        Fragment ID  Link count  Bits

 11.0.3.1        1487        0x80000002  0            1           None

 22.0.3.2        1486        0x80000001  0            1           B

                Inter Area Prefix Link States (Area 1)

ADV Router       Age         Seq#        Prefix

 22.0.3.2        1476        0x80000001  22:0:1::2/128

 22.0.3.2        1476        0x80000001  22:0:2::2/128

 22.0.3.2        1476        0x80000001  22:0:3::2/128

 22.0.3.2        1476        0x80000001  23::/64

 22.0.3.2        1416        0x80000001  33:0:1::3/128

 22.0.3.2        1416        0x80000001  33:0:2::3/128

 22.0.3.2        1416        0x80000001  33:0:3::3/128

 22.0.3.2        1416        0x80000001  44:0:3::4/128

 22.0.3.2        1416        0x80000001  44:0:2::4/128

 22.0.3.2        1416        0x80000001  44:0:1::4/128

 22.0.3.2        1416        0x80000001  34::/64

                Link (Type-8) Link States (Area 1)

ADV Router       Age         Seq#        Link ID    Interface

 11.0.3.1        1590        0x80000001  11         Se2/0

 22.0.3.2        1486        0x80000001  11         Se2/0

                Intra Area Prefix Link States (Area 1)

ADV Router       Age         Seq#        Link ID    Ref-lstype  Ref-LSID

 11.0.3.1        1547        0x80000003  0          0x2001      0

 22.0.3.2        1486        0x80000001  0          0x2001      0

R2:

ipv6 router ospf 1

area 1 range 11::/16

area 0 range 22::/16

exit

telnet 23.0.0.3

password: cisco 

R3>enable

password: cisco

R3# show ipv6 ospf database

OSPFv3 Router with ID (33.0.3.3) (Process ID 3)

                Router Link States (Area 0)

ADV Router       Age         Seq#        Fragment ID  Link count  Bits

 22.0.3.2        1674        0x80000002  0            1           B

 33.0.3.3        1673        0x80000002  0            1           B

                Net Link States (Area 0)

ADV Router       Age         Seq#        Link ID    Rtr count

 33.0.3.3        1673        0x80000001  3          2

                Inter Area Prefix Link States (Area 0)

ADV Router       Age         Seq#        Prefix

 22.0.3.2        1730        0x80000001  12::/64

 22.0.3.2        124         0x80000001  11::/16

 33.0.3.3        1704        0x80000001  34::/64

 33.0.3.3        1693        0x80000001  44:0:1::4/128

 33.0.3.3        1693        0x80000001  44:0:2::4/128

 33.0.3.3        1693        0x80000001  44:0:3::4/128

                Link (Type-8) Link States (Area 0)

ADV Router       Age         Seq#        Link ID    Interface

 22.0.3.2        1740        0x80000001  3          Et0/0

 33.0.3.3        1714        0x80000001  3          Et0/0

                Intra Area Prefix Link States (Area 0)

ADV Router       Age         Seq#        Link ID    Ref-lstype  Ref-LSID

 22.0.3.2        1674        0x80000002  0          0x2001      0

 33.0.3.3        1673        0x80000002  0          0x2001      0

 33.0.3.3        1673        0x80000001  3072       0x2002      3

                Router Link States (Area 2)

ADV Router       Age         Seq#        Fragment ID  Link count  Bits

 33.0.3.3        1697        0x80000002  0            1           B

 44.0.3.4        1698        0x80000001  0            1           None

                Inter Area Prefix Link States (Area 2)

ADV Router       Age         Seq#        Prefix

 33.0.3.3        1704        0x80000001  33:0:1::3/128

 33.0.3.3        1704        0x80000001  33:0:2::3/128

 33.0.3.3        1704        0x80000001  33:0:3::3/128

 33.0.3.3        1704        0x80000001  23::/64

 33.0.3.3        1669        0x80000001  22:0:1::2/128

 33.0.3.3        1669        0x80000001  22:0:2::2/128

 33.0.3.3        1669        0x80000001  22:0:3::2/128

 33.0.3.3        1669        0x80000001  12::/64

 33.0.3.3        123         0x80000001  11::/16

                Link (Type-8) Link States (Area 2)

ADV Router       Age         Seq#        Link ID    Interface

 33.0.3.3        1714        0x80000001  11         Se2/0

 44.0.3.4        1699        0x80000001  11         Se2/0

                Intra Area Prefix Link States (Area 2)

ADV Router       Age         Seq#        Link ID    Ref-lstype  Ref-LSID

 33.0.3.3        1714        0x80000001  0          0x2001      0

 44.0.3.4        1698        0x80000001  0          0x2001      0

R3:

ipv6 router ospf 1

area 0 range 22::/16

exit

 [Connection to 23.0.0.3 closed by foreign host]

Task 2:  Verification

• Verify receipt of summary route in neighbor routing table & verify creation of null interface in routing table by following command:

R2#show ipv6  route

! (Shows router’s routing table and IPv6 routes entries)

IPv6 Routing Table - default - 23 entries

Codes: C - Connected, L - Local, S - Static, U - Per-user Static route

       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP

       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea

       IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO

       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect

       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2

       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, l – LISP

O   11::/16 [110/64]

     via Null0, directly connected

O   11:0:1::1/128 [110/64]

     via FE80::A8BB:CCFF:FE00:100, Serial2/0

O   11:0:2::1/128 [110/64]

     via FE80::A8BB:CCFF:FE00:100, Serial2/0

O   11:0:3::1/128 [110/64]

     via FE80::A8BB:CCFF:FE00:100, Serial2/0

C   12::/64 [0/0]

     via Serial2/0, directly connected

L   12::A8BB:CCFF:FE00:200/128 [0/0]

     via Serial2/0, receive

O   22::/16 [110/0]

     via Null0, directly connected

C   22:0:1::/64 [0/0]

    via Loopback1, receive

C   22:0:2::/64 [0/0]

     via Loopback2, directly connected

L   22:0:2::2/128 [0/0]

     via Loopback2, receive

C   22:0:3::/64 [0/0]

     via Loopback3, directly connected

L   22:0:3::2/128 [0/0]

     via Loopback3, receive

C   23::/64 [0/0]

     via Ethernet0/0, directly connected

L   23::A8BB:CCFF:FE00:200/128 [0/0]

     via Ethernet0/0, receive

O   33:0:1::3/128 [110/10]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

O   33:0:2::3/128 [110/10]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

O   33:0:3::3/128 [110/10]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  34::/64 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  44:0:1::4/128 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  44:0:2::4/128 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

OI  44:0:3::4/128 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Ethernet0/0

L   FF00::/8 [0/0]

     via Null0, receive

(ABR Router will send summary routes from one area to other areas. When summarization is configured on a router, same router immediately created a routing point to Null 0 for loop prevention. Hence Null 0 will be created only on ABR routers in OSPF.)

R4#show ipv6 route

! (Shows router’s routing table and IPv6 routes entries)

IPv6 Routing Table - default - 16 entries

Codes: C - Connected, L - Local, S - Static, U - Per-user Static route

       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP

       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea

       IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO

       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect

       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2

       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, l – LISP

OI  11::/16 [110/138]

     via FE80::A8BB:CCFF:FE00:300, Serial2/0

OI  12::/64 [110/138]

     via FE80::A8BB:CCFF:FE00:300, Serial2/0

OI  22::/16 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Serial2/0

OI  23::/64 [110/74]

     via FE80::A8BB:CCFF:FE00:300, Serial2/0

OI  33:0:1::3/128 [110/64]

     via FE80::A8BB:CCFF:FE00:300, Serial2/0

OI  33:0:2::3/128 [110/64]

     via FE80::A8BB:CCFF:FE00:300, Serial2/0

OI  33:0:3::3/128 [110/64]

     via FE80::A8BB:CCFF:FE00:300, Serial2/0

C   34::/64 [0/0]

     via Serial2/0, directly connected

L   34::A8BB:CCFF:FE00:400/128 [0/0]

     via Serial2/0, receive

C   44:0:1::/64 [0/0]

     via Loopback1, directly connected

L   44:0:1::4/128 [0/0]

     via Loopback1, receive

C   44:0:2::/64 [0/0]

     via Loopback2, directly connected

L   44:0:2::4/128 [0/0]

     via Loopback2, receive

C   44:0:3::/64 [0/0]

     via Loopback3, directly connected

L   44:0:3::4/128 [0/0]

     via Loopback3, receive

L   FF00::/8 [0/0]

     via Null0, receive

(Summarized routes are received from inter-area.)