Michael,

  First, there's no route summarization within an area.
  Second, the OSPF spec does not include any mechanism
  for dynamic route deaggregation (does not mean implementations
  cannot have it).

  I guess you would either need you bridges talk OSPF and
  announce separate subnets or have each connected to a single
  router and have one router announce one subnet.

--
Alex Zinin
Wednesday, July 04, 2001, 4:22:53 PM, Michael Yeung wrote:
> Hi all,
>     As I understand from RFC2328, address range is
> supported only at the ABR.  What I like to do is to be
> able to advertise selective individual subnets and
> hosts on a given LAN without using ABR.  Consider the
> following:
>                           LAN1
>                  <------10.1.0.0------>
>                 10.1.1.0       10.1.2.0
> R2-------R1----- bridge1 -------bridge2-----R3
>   \                                        /
>     \                                    /
>       ------------bridge3---------------
>                  20.1.0.0
>                    LAN2
> LAN1 includes bridge1 and bridge2
> LAN2 includes bridge3
> bridge1 covers subnet 10.1.1.0
> bridge2 covers subnet 10.1.2.0
> bridge3 covers subnet 20.1.0.0
> LAN1 covers subnet 10.1.0.0
> LAN2 covers subnet 20.1.0.0
> What I need:
> - When connection between bridge1 and bridge2 is okay,
> both R1 and R3 advertise 10.1.0.0 to R2
> - When connection between bridge1 and bridge2 FAILED,
> R1 advertise 10.1.1.0 to R2, R3 advertise 10.1.2.0 to
> R2
> Given all routers are within a single OSPF area,
> address range is not feasible.
> In what form should R1 advertise 10.1.1.0 to R2?
> - external route???
> - address range but R1 is not ABR???
> Any suggestion is greatly appreciated.
> thanx in advance,
> Michael
> __________________________________________________
> Do You Yahoo!?
> Get personalized email addresses from Yahoo! Mail
> http://personal.mail.yahoo.com/

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]