From: CCIEin2006 (ciscocciein2006@gmail.com)
Date: Fri Jun 16 2006 - 10:36:54 ART
Cool - thanks guys
On 6/16/06, Ivan <ivan@iip.net> wrote:
>
> Long message ....................
>
>
> Elaboration "not-advertise" keyword
>
>
> Topology :
> Core-2 --(area 1 nssa)-- [Fa0/1]Core-sw1[vl27,28] --(area 0)-- [vl27,28]
> Core-sw2
>
> TEST 1
>
> Without not-adverrtise
> -----------------------------------------
> Core_sw1#sh run | b router ospf
> router ospf 101
> router-id 172.27.227.1
> log-adjacency-changes
> area 0 authentication message-digest
> area 1 nssa default-information-originate
> area 1 range 172.21.0.0 255.255.0.0
> network 172.21.178.0 0.0.0.255 area 1
> network 172.21.179.0 0.0.0.255 area 1
> network 172.27.227.0 0.0.0.255 area 0
> network 172.28.128.0 0.0.0.255 area 0
> !
>
> Core_sw2#sh ip route ospf
> 172.21.0.0 255.255.0.0 is variably subnetted, 3 subnets, 2 masks
> O E1 172.21.175.0 255.255.255.128 <------- This from Core-2
> [110/902] via 172.27.227.1, 00:00:14, Vlan27
> [110/902] via 172.28.128.1, 00:00:14, Vlan28
> O E1 172.21.175.128 255.255.255.128 <------ This from Core-2
> [110/902] via 172.27.227.1, 00:00:14, Vlan27
> [110/902] via 172.28.128.1, 00:00:14, Vlan28
> O IA 172.21.0.0 255.255.0.0 <---- Summary route from Core-sw1
> [110/2] via 172.28.128.1, 00:00:14, Vlan28
> [110/2] via 172.27.227.1, 00:00:14, Vlan27
>
> [.... skipped...]
>
> Place not-advertise
> ----------------------------------------------
> Core_sw1#sh run | b router ospf
> router ospf 101
> router-id 172.27.227.1
> log-adjacency-changes
> area 0 authentication message-digest
> area 1 nssa default-information-originate
> area 1 range 172.21.0.0 255.255.0.0 not-advertise !!!!!!!!!!!!!!!!!!!!!
>
>
> Core_sw2#sh ip route ospf
> O IA 172.22.0.0 255.255.0.0 [110/2] via 172.27.227.2, 00:00:04, Vlan27
> 10.0.0.0 255.0.0.0 is variably subnetted, 7 subnets, 5 masks
> O IA 10.177.177.0 255.255.255.128
> [110/2] via 172.28.128.7, 00:00:04, Vlan28
> [110/2] via 172.27.227.7, 00:00:04, Vlan27
>
>
> Here we see that summary is remove and more longer remove.
>
>
>
>
> TEST 2
>
> Without not-advertise
> --------------------------------
> Core_sw1#sh run | b router ospf 101
> router ospf 101
> router-id 172.27.227.1
> log-adjacency-changes
> area 0 authentication message-digest
> area 1 nssa default-information-originate
> network 172.21.178.0 0.0.0.255 area 1
> network 172.21.179.0 0.0.0.255 area 1
> network 172.27.227.0 0.0.0.255 area 0
> network 172.28.128.0 0.0.0.255 area 0
>
> Core-2#sh run | b router ospf
> router ospf 101
> router-id 172.21.178.1
> log-adjacency-changes
> area 1 nssa
> redistribute eigrp 101 metric 900 metric-type 1 subnets
> passive-interface Serial0/2.1
> passive-interface Serial0/2.2
> network 172.21.177.0 0.0.0.255 area 1
> network 172.21.178.0 0.0.0.255 area 1
>
>
> Core_sw1#sh ip route ospf
> 172.21.0.0 255.255.0.0 is variably subnetted, 8 subnets, 2 masks
> O 172.21.177.0 255.255.255.128
> [110/782] via 172.21.178.129, 00:03:06, FastEthernet0/1
> O 172.21.178.0 255.255.255.128
> [110/2] via 172.21.178.129, 00:03:06, FastEthernet0/1
> O N1 172.21.175.0 255.255.255.128 <---------------- exist
> [110/1682] via 172.21.178.129, 00:02:56, FastEthernet0/1
> O 172.21.177.128 255.255.255.128
> [110/1563] via 172.21.178.129, 00:03:06, FastEthernet0/1
> O N1 172.21.175.128 255.255.255.128 <--------------- exist
> [110/1682] via 172.21.178.129, 00:02:57, FastEthernet0/1
> O 172.21.0.0 255.255.0.0 is a summary, 00:03:07, Null0
>
> [...skipped...]
>
>
> With not-advertise
> ----------------------------------------
> Core-2#sh run | b router ospf
> router ospf 101
> router-id 172.21.178.1
> log-adjacency-changes
> area 1 nssa
> summary-address 172.21.0.0 255.255.0.0 not-advertise
> !!!!!!!!!!!!!!!!!!!!
> redistribute eigrp 101 metric 900 metric-type 1 subnets
> passive-interface Serial0/2.1
> passive-interface Serial0/2.2
> network 172.21.177.0 0.0.0.255 area 1
> network 172.21.178.0 0.0.0.255 area 1
> !
>
>
> Core_sw1#sh ip route ospf
> 172.21.0.0 255.255.0.0 is variably subnetted, 6 subnets, 2 masks
> O 172.21.177.0 255.255.255.128
> [110/782] via 172.21.178.129, 00:00:09, FastEthernet0/1
> O 172.21.178.0 255.255.255.128
> [110/2] via 172.21.178.129, 00:00:09, FastEthernet0/1
> O 172.21.177.128 255.255.255.128
> [110/1563] via 172.21.178.129, 00:00:09, FastEthernet0/1
> O 172.21.0.0 255.255.0.0 is a summary, 00:00:09, Null0
>
> Here we see that all external routes (O N1) disapper.
>
> > Don't think the filter-list prefix would work.
> >
> > Can you elaborate on:
> > not-advertise with area range on ABR
> >
> > How is that accomplished?
> >
> > On 6/15/06, Ivan <ivan@iip.net> wrote:
> > > distribute-list out work only on routers where external prefixes
> > > originating.
> > > To filter LSA 3-4-5 you can use
> > > *) not-advertise with area range on ABR
> > > *) summary-address - make anoter external prefix)
> > > ***) filter-list prefix - not sure about this)
> > >
> > > > Hello group,
> > > >
> > > > I tried filtering External LSA's between areas with an area filter
> list
> > >
> > > but
> > >
> > > > it does not work! I was told that filter lists do not work on
> External
> > > > LSA's. Is that true?
> > > >
> > > > Also I tried using inbound distribute lists but it seems the
> External
> > >
> > > LSA's
> > >
> > > > are still being forwarded to the next hop routers and it seems I
> have
> > > > to use distribute lists on all the routers...
> > > >
> > > > How do you filter External LSA's?
> > > >
> > > > Thanks.
> > > >
> > > >
> _______________________________________________________________________
> > > > Subscription information may be found at:
> > > > http://www.groupstudy.com/list/CCIELab.html
> > >
> > > --
> > > Ivan
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> --
> Ivan
This archive was generated by hypermail 2.1.4 : Sat Jul 01 2006 - 07:57:33 ART