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Highlighted
Enthusiast

OSPFv3 route summarization

I have these loopback interfaces:

lo4  2004::4:1/112

lo5  2004::5:1/112

lo6  2004::6:1/112 

lo7  2004::7:1/112

I want to summarize them at the area boundary, using "area range" command. I get the following error:

R1(config)#ipv6 router ospf 6
R1(config-rtr)#area 12 range 2004::4::/110
                                      ^
% Invalid input detected at '^' marker.

R1(config-rtr)#area 12 range 2004::4::?   
X:X:X:X::X/<0-128> 

R1(config-rtr)#area 12 range 2004::4/110
OSPFv3: Inconsistent area range prefix/length: 2004::4/110
R1(config-rtr)#
R1(config-rtr)#

3 REPLIES 3
Highlighted
Advisor

Hi,

area 12 range 2004::4/110

the prefix should be 2004::4:0/110 and are you sure the prefixes you want to summarize are in the area 12

Regards.

Alain.

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Highlighted

Hi Alain,

Router R2 is connected to R1 through a frame-relay circuit. R2 is ABR. R1 is internal router in area 12.

R2 does not see the summary route. Instead, it sees individual routes:

R2#sh ipv6 route
IPv6 Routing Table - 11 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
O   2004::4:1/128 [110/64]
     via FE80::CE01:23FF:FE6A:0, Serial0/0.201
O   2004::5:1/128 [110/64]
     via FE80::CE01:23FF:FE6A:0, Serial0/0.201
O   2004::6:1/128 [110/64]
     via FE80::CE01:23FF:FE6A:0, Serial0/0.201
O   2004::7:1/128 [110/64]
     via FE80::CE01:23FF:FE6A:0, Serial0/0.201
C   2026::1:0/122 [0/0]
     via ::, Serial0/0.203
L   2026::1:1/128 [0/0]
     via ::, Serial0/0.203
C   2026::12:0/122 [0/0]
     via ::, Serial0/0.201
L   2026::12:2/128 [0/0]
     via ::, Serial0/0.201
OI  2026::34:0/122 [110/128]
     via FE80::CA09:23FF:FE88:0, Serial0/0.203
L   FE80::/10 [0/0]
     via ::, Null0
L   FF00::/8 [0/0]
     via ::, Null0
R2#sh ipv6 route 2004::4:0
% Route not found
R2#

Highlighted

Hi,

R2 is ABR. R1 is internal router in area 12.

you can summarize in OSPF on 2 locations only: ABR or ASBR so summarizing on R1 will have no effect.

So you must summarize on R2 and on an intenal router in area 0 you should see the summary route( OI route).

Regards.

Alain.

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