OSPF and Forcing a Subnet

Sat Jul 20 19:55:30 UTC 2013

Dear Jon I have a mistake in my last email, there is a static route like
this:

ip route 172.16.0.0 255.255.0.0 10.20.76.12

but again it is redistributing

On Sun, Jul 21, 2013 at 12:22 AM, Jon Lewis <jlewis at lewis.org> wrote:

> You don't have a route for 172.16/16 in the config below, so ospf will not
> advertise it.  You do have a route for a subnet of 172.16/16, so either use
> summary-address 172.16.0.0 255.255.0.0 or nail up a static route for
> 172.16.0.0 255.255.0.0 to null0 and redistribute static subnets, and then
> ospf can redistribute that static route.
>
>
> On Sun, 21 Jul 2013, Shahab Vahabzadeh wrote:
>
>  Dear Friends,
>> I have an OSPF over GRE configuration sending you below in which I have
>> problem.
>> I want to force OSPF to advertise 172.16/16 range without checking
>> anything.
>> And as you see I have an static route for it in routing table but again
>> OSPF do not advertise it, only it advertise when I put one /32 subnet on
>> loopback interface.
>> even I put "redistribute static subnets" command with/without route-map
>> but
>> again do not work.
>> I think because of having my providers address range in my static routes,
>> routers and ospf confused when wanna advertise routers.
>>
>>
>> interface Tunnel0
>>
>>>  ip address 128.140.40.2 255.255.255.252
>>>  tunnel source 10.20.76.2
>>>  tunnel destination 10.20.75.2
>>> interface GigabitEthernet0/0
>>>  description UPSTREAM - INTRANET
>>>  ip address 10.20.76.2 255.255.255.248
>>> interface GigabitEthernet0/1
>>>  description CONNECTED ROUTER
>>>  ip address 10.20.76.9 255.255.255.248
>>>
>>> router ospf 10
>>>  log-adjacency-changes
>>>  area 10 range 172.16.0.0 255.255.0.0
>>>  passive-interface default
>>>  no passive-interface Tunnel0
>>>  network 172.16.0.0 0.0.255.255 area 10
>>>  network 128.140.40.0 0.0.0.3 area 0
>>> ip route 0.0.0.0 0.0.0.0 10.20.76.1
>>> ip route 172.16.0.0 255.255.224.0 10.20.76.12
>>> ip route 10.20.76.0 255.255.255.0 10.20.76.12
>>> ip route 10.20.77.0 255.255.255.0 10.20.76.12
>>>
>>
>>
>>
>> Thanks
>>
>> --
>> Regards,
>> Shahab Vahabzadeh, Network Engineer and System Administrator
>>
>> Cell Phone: +1 (415) 871 0742
>> PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81  C2EE 76A2 46C2 5367 BF90
>>
>>
> ------------------------------**------------------------------**----------
>  Jon Lewis, MCP :)           |  I route
>                              |  therefore you are
> _________ http://www.lewis.org/~jlewis/**pgp<http://www.lewis.org/~jlewis/pgp>for PGP public key_________
>

-- 
Regards,
Shahab Vahabzadeh, Network Engineer and System Administrator

Cell Phone: +1 (415) 871 0742
PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81  C2EE 76A2 46C2 5367 BF90