Re: OSPF and Forcing a Subnet

[Shahab Vahabzadeh <sh.vahabzadeh () gmail com>]

Dear Randy,
Thanks for your help, but 172.16/16 belong to that region and for example
172.17/16 belong to another one and I want to ospf bring me the whole
subnet not which I used.
And summary-address does not to this for me.
Thanks


On Sun, Jul 21, 2013 at 1:21 AM, Randy <randy_94108 () yahoo com> wrote:

> what you are seeing is the expected behavior.
>
> you are asking the router to generate a type 3 summary for a type 1 lsa
> that doesn't exist for area 10 via the "area 10 range' command" (also, that
> is why it works when you add a /32 to loopback)
>
> 172.16/16 is an external route. If you want to generate a type 5 aggregate
> use summary-addr as Jon has pointed out. Else, leave static in place,
> redist static subnets but remove "area 10 range 172.16.0.0 255.255.0.0"
> from ospf config.
> ./Randy
>
>
>
>
> _______________________________
> > From: Shahab Vahabzadeh <sh.vahabzadeh () gmail com>
> > To: Jon Lewis <jlewis () lewis org>
> > Cc: nanog <nanog () nanog org>
> > Sent: Saturday, July 20, 2013 12:55 PM
> > Subject: Re: OSPF and Forcing a Subnet
> >
> >
> > 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 () 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



-- 
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