From: Herbert Maosa (asawilunda@googlemail.com)
Date: Sat Aug 18 2007 - 11:59:30 ART
Since you are labbing this, you may also try changing the metric-type. I
have not tested this, but I know you can use the distribute-list
route-mapcommand in the ospf router configuration mode to filter
external routes that
are installed in the routing table from the OSPF database. In this route-map
you have the option to set metric-type type-1 to change from E2 to E1. I
would be interested to see the result of this if you can test it. You may
have to test this on the router generating the summary as well as another
router receiving the summary.
Herbert.
On 8/18/07, Bit Gossip <bit.gossip@chello.nl> wrote:
>
> Quickly labbing it, shows that:
> - if ALL contributing are type-1 the summary is type-1
> - if ALL contributing are type-2 the summary is type-2
> - in a mix of type-1 and 2 the summary in type-1
> Would be interesting to understand better the last case.
>
> The funny thing is that on the ASBR the summary address is not shown as
> external in the 'show ip route' even if it is clearly external in the
> 'show
> ip ospf database'
>
> R5#show ip route ospf
> 1.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
> O 1.1.1.0/24 is a summary, 00:01:56, Null0
>
> R5#show ip ospf database
>
> OSPF Router with ID (150.1.5.5) (Process ID 1)
> <...>
> Type-5 AS External Link States
>
> Link ID ADV Router Age Seq# Checksum Tag
> 1.1.1.0 150.1.5.5 200 0x80000001 0x00ABD0 0
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> R5#show ip ospf summary-address
>
> OSPF Process 1, Summary-address
>
> 1.1.1.0/255.255.255.0 Metric 20, Type 1, Tag 0
> R5#show run | s ospf
> router ospf 1
> log-adjacency-changes
> summary-address 1.1.1.0 255.255.255.0
> redistribute connected metric-type 1 subnets
> network 149.1.45.5 0.0.0.0 area 0
> network 150.1.5.5 0.0.0.0 area 0
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> R5#show run | s ospf
> router ospf 1
> log-adjacency-changes
> summary-address 1.1.1.0 255.255.255.0
> redistribute connected metric-type 1 subnets
> redistribute rip subnets
> network 149.1.45.5 0.0.0.0 area 0
> network 150.1.5.5 0.0.0.0 area 0
> access-list 100 deny ospf any any
> R5#show ospf dat
> R5#show ip ospf sum
> R5#show ip ospf summary-address
>
> OSPF Process 1, Summary-address
>
> 1.1.1.0/255.255.255.0 Metric 20, Type 1, Tag 0
>
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> R5(config-router)#do show run | s ospf
> router ospf 1
> log-adjacency-changes
> summary-address 1.1.1.0 255.255.255.0
> redistribute connected subnets
> redistribute rip subnets
> network 149.1.45.5 0.0.0.0 area 0
> network 150.1.5.5 0.0.0.0 area 0
> access-list 100 deny ospf any any
> R5(config-router)#do show ip ospf summary
>
> OSPF Process 1, Summary-address
>
> 1.1.1.0/255.255.255.0 Metric 20, Type 2, Tag 0
>
>
> ----- Original Message -----
> From: "Toh Soon, Lim" <tohsoon28@gmail.com>
> To: "Theo M" <theorack@gmail.com>
> Cc: "Herbert Maosa" <asawilunda@googlemail.com>; "Cisco certification"
> <ccielab@groupstudy.com>
> Sent: Saturday, August 18, 2007 12:17 AM
> Subject: Re: Summary on ASBR / Make a Type-1 ?!?
>
>
> > Hi Theo,
> >
> > Do you mean if all the component routes are E1s then the summary address
> > is
> > advertised as E1, and vice versa for E2? I have not labbed and tested it
> > yet.
> >
> > This is the same question that baffles me when I was studying for
> Written
> > Exam. Browsing thru the OSPF commands in Command References, I don't see
> > any
> > command to set the metric type of the summary route.
> >
> > Herbert was saying to tag the summary, then use the tag in a route-map
> to
> > set the metric-type. But on which router to define the route-map and
> what
> > mechanism to call it? My understanding is we call the route-map in a
> > redistribute statement when redistributing OSPF into other protocols.
> >
> > Please help.
> >
> >
> > Thank you.
> >
> > Confused Too,
> > Lim TS
> >
> >
> > On 8/18/07, Theo M <theorack@gmail.com> wrote:
> >>
> >> Hello guys,
> >>
> >> I know I can change the metric-type when redistributing.
> >> In my scenario, I redistribute 2 connected interfaces w/ a RMAP,
> >> one as E1 and one as E2, then I summarize on the same router.
> >> In fact my goal here is to understand the original meaning of the
> >> item in Anthony's Extended Blueprint.
> >>
> >> --
> >> Theo
> >>
> >> On 8/17/07, Herbert Maosa <asawilunda@googlemail.com> wrote:
> >> >
> >> > I doesnt look like the summary address has an option of setting the
> >> > metric-type. Are you looking to do this on the same router you are
> >> > generating the summary or on a different router ?
> >> >
> >> > Without understanding the scenario the only thing I am thinking of at
> >> the
> >> > moment is to tag the summary, then use the tag in a route-map to set
> >> > the
> >> > metric-type.
> >> >
> >> >
> >> > Herbert.
> >> >
> >> > On 8/17/07, Herbert Maosa <asawilunda@googlemail.com> wrote:
> >> > >
> >> > > Type 5 LSAs ( External routes ) are either type-1 or type-2 ( E1
> or
> >> E2
> >> > > ).
> >> > >
> >> > >
> >> > > Herbert.
> >> > >
> >> > >
> >> > > On 8/17/07, Theo M < theorack@gmail.com> wrote:
> >> > > >
> >> > > > Hello,
> >> > > >
> >> > > > I found this on Anthony Sequeira's Extended Blueprint:
> >> > > >
> >> > > > >>>
> >> > > > II. Summary Address on ASBR
> >> > > > I. Make a Type-1
> >> > > > <<<
> >> > > >
> >> > > > It's a typo, should be a Type-5, right ?
> >> > > >
> >> > > > --
> >> > > >
> >> > > >
> >> _______________________________________________________________________
> >> > > >
> >> > > > Subscription information may be found at:
> >> > > > http://www.groupstudy.com/list/CCIELab.html
> >> > > >
> >> > >
> >> > >
> >> > >
> >> > > --
> >> > > Kindest regards,
> >> > > hm
> >> >
> >> >
> >> >
> >> >
> >> > --
> >> > Kindest regards,
> >> > hm
> >>
> >> _______________________________________________________________________
> >> Subscription information may be found at:
> >> http://www.groupstudy.com/list/CCIELab.html
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
>
>
-- Kindest regards, hm
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