[j-nsp] JNCIP EBGP Case Study...

[Sean Clarke]

What is in your ibgp export policy from R1 to R3  ? Are you putting 
something in there to cause an issue ?






On 10/29/09 10:43 AM, Hoogen wrote:
> Hi Felix,
>
> Thank you for the reply..
>
> I am not sure how that 17 hidden routes came into play... But its not 
> there now.. I still see the issue..
>
> I had already checked the hidden routes..and those are not the ones 
> which are hiding
>
> lab at R3# run show route receive-protocol bgp 10.0.6.1 hidden extensive
>
> inet.0: 66 destinations, 85 routes (63 active, 0 holddown, 3 hidden)
>
> __juniper_private1__.inet.0: 2 destinations, 2 routes (2 active, 0 
> holddown, 0 hidden)
>
> iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
>
> [edit]
> lab at R3#
>
> lab at R3# run show route receive-protocol bgp 10.0.6.1
>
> inet.0: 66 destinations, 85 routes (63 active, 0 holddown, 3 hidden)
>   Prefix                  Nexthop              MED     Lclpref    AS path
> * 192.168.10.0/24 <http://192.168.10.0/24>         10.0.6.1           
>           100        I
> * 192.168.100.0/24 <http://192.168.100.0/24>        10.0.6.1           
>   101     101        I
>
> __juniper_private1__.inet.0: 2 destinations, 2 routes (2 active, 0 
> holddown, 0 hidden)
>
> iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
>
> [edit]
> lab at R3#
>
> lab at R3# run show route protocol bgp hidden extensive
>
> inet.0: 66 destinations, 85 routes (63 active, 0 holddown, 3 hidden)
> 172.17.0.0/16 <http://172.17.0.0/16> (1 entry, 0 announced)
>          BGP                 /-101
>                 Next-hop reference count: 2
>                 Source: 172.16.0.14
>                 Next hop: 172.16.0.14 via ge-0/0/0.0, selected
>                 State: <Hidden Ext>
>                 Local AS: 65000 Peer AS: 65222
>                 Age: 1:27:54
>                 Task: BGP_65222.172.16.0.14+3227
>                 AS path: 65222 I
>                 Localpref: 100
>                 Router ID: 130.130.0.1
>
> 192.0.2.0/24 <http://192.0.2.0/24> (1 entry, 0 announced)
>          BGP                 /-101
>                 Next-hop reference count: 5
>                 Source: 172.16.0.18
>                 Next hop: 172.16.0.18 via ge-0/0/3.0, selected
>                 State: <Hidden Martian Ext>
>                 Local AS: 65000 Peer AS: 65222
>                 Age: 1:28:19
>                 Task: BGP_65222.172.16.0.18+179
>                 AS path: 65222 I
>                 Communities: 65412:102
>                 Localpref: 100
>                 Router ID: 130.130.0.2
>
> 220.0.0.0/28 <http://220.0.0.0/28> (1 entry, 0 announced)
>          BGP                 /-101
>                 Next-hop reference count: 5
>                 Source: 172.16.0.18
>                 Next hop: 172.16.0.18 via ge-0/0/3.0, selected
>                 State: <Hidden Ext>
>                 Local AS: 65000 Peer AS: 65222
>                 Age: 1:28:19
>                 Task: BGP_65222.172.16.0.18+179
>                 AS path: 65222 I
>                 Localpref: 100
>                 Router ID: 130.130.0.2
>
> __juniper_private1__.inet.0: 2 destinations, 2 routes (2 active, 0 
> holddown, 0 hidden)
>
> iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
> [edit]
> lab at R3#
>
>
> The one I am concerned is with group 65000 and I don't have any import 
> policy to deny anything there..
>
> [edit]
> lab at R3# show protocols bgp
> advertise-inactive;
> group 65000 {
>     type internal;
>     local-address 10.0.3.3;
>     export ibgp;
>     neighbor 10.0.6.1;
> }
> group c-bgp {
>     type external;
>     multihop;
>     local-address 10.0.3.3;
>     export ibgp;
>     neighbor 10.0.3.4 {
>         hold-time 180;
>         peer-as 65001;
>     }
>     neighbor 10.0.3.5 {
>         peer-as 65002;
>     }
> }
> group t1-t2 {
>     type external;
>     damping;
>     import [ damp trans-filter-in ];
>     export [ no-192-24s prepend ];
>     remove-private;
>     multipath;
>     neighbor 172.16.0.14 {
>         peer-as 65222;
>     }
>     neighbor 172.16.0.18 {
>         peer-as 65222;
>     }
> }
>
> [edit]
> lab at R3#
>
> This is really strange.. I compared the solutions, and there seems 
> nothing wrong..
>
> -Hoogen
>
> On Thu, Oct 29, 2009 at 1:59 AM, Felix Schueren 
> <felix.schueren at hosteurope.de <mailto:felix.schueren at hosteurope.de>> 
> wrote:
>
>     Hoogen,
>
>     Hoogen wrote:
>     >>> Now R3 only receives
>     >>>
>     >>> lab at R3# run show route receive-protocol bgp 10.0.6.1
>     >>>
>     >>> inet.0: 66 destinations, 106 routes (63 active, 0 holddown, 17
>     hidden)
>     >>>   Prefix                  Nexthop              MED     Lclpref
>        AS path
>     >>> * 192.168.10.0/24 <http://192.168.10.0/24>         10.0.6.1  
>                       100        I
>     >>> * 192.168.100.0/24 <http://192.168.100.0/24>        10.0.6.1  
>               101     101        I
>     >>>
>     please do
>     show route receive-protocol bgp 10.0.6.1 hidden extensive
>
>     also paste
>     show configuration protocols bgp
>
>     both from R3
>
>     Kind regards,
>
>     Felix
>
>     --
>     Felix Schüren
>     Head of Network
>
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