Re: BGP Route Reflector with Synchronization ON

I get that.! But.. with Route Reflectors the 5.5.0.0/24, 6.6.0.0/34
7.7.0.0/24 are all there in the OSPF Domain too.. Those routes arent
getting a R.I.B failure.! i need to know why?... When i see the
roptuing table... OSPF has a route to the Destination but... BGP isnt
showing it as a RIB failure when SYN is ON.! I switch OFF SYN on R6
and its BGP table is fine... as expected.! 5.0.0.0/16 6.0.0.0/16
7.0.0.0/16 all have RIB Failure due to the OSPF Routes!
Thanking You

Yours Sincerely

Divin Mathew John
divinjohn_at_gmail.com
divin_at_dide3d.com
http://www.dide3d.com
+91 9945430983
+91 9846697191
+974 5008916
PGP PUBLIC KEY BLOCK @ http://www.dide3d.com/divin_Public_PGP_key.txt
Sent from Bangalore, KA, India

2009/5/13 Alex H. Ryu <r.hyunseog_at_ieee.org>:
> If you have BGP routes not in IGP such as OSPF, you should turn OFF BGP
> synchronization.
> For an example, if you peer with EBGP and/or your router is working as
> transit router from BGP viewpoint, you have to turn off.
>
> BGP sync will check IGP routing table, and if it is not in there, BGP
> will not install those BGP prefix for active entry.
>
>
> Alex
>
>
> Divin Mathew John wrote:
>> Hey...
>> i have this scenario where R5-----R6-----R7 and R7 is connected to
>> R5 for redundancy.! now. I made R5 the Route Reflector. and i have
>> OSPF running with all the loopbacks advertised in OSPF. Now without
>> turning ON Synchronization this is the output
>> R6#sh ip bgp
>> r>i5.5.0.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.1.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.2.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.3.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.4.0/24 5.5.0.5 0 100 0 ?
>> r>i7.7.0.0/24 7.7.0.7 0 100 0 ?
>> r>i7.7.1.0/24 7.7.0.7 0 100 0 ?
>> r>i7.7.2.0/24 7.7.0.7 0 100 0 ?
>> r>i7.7.3.0/24 7.7.0.7 0 100 0 ?
>> r>i7.7.4.0/24 7.7.0.7 0 100 0 ?
>>
>> where as in Switch ON Synchronization @R6
>>
>> r>i5.5.0.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.1.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.2.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.3.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.4.0/24 5.5.0.5 0 100 0 ?
>> *> 6.6.0.0/24 0.0.0.0 0 32768 ?
>> *> 6.6.1.0/24 0.0.0.0 0 32768 ?
>> *> 6.6.2.0/24 0.0.0.0 0 32768 ?
>> *> 6.6.3.0/24 0.0.0.0 0 32768 ?
>> *> 6.6.4.0/24 0.0.0.0 0 32768 ?
>> * i7.7.0.0/24 7.7.0.7 0 100 0 ?
>> * i7.7.1.0/24 7.7.0.7 0 100 0 ?
>> * i7.7.2.0/24 7.7.0.7 0 100 0 ?
>> * i7.7.3.0/24 7.7.0.7 0 100 0 ?
>> * i7.7.4.0/24 7.7.0.7 0 100 0 ?
>>
>> @R7 SYN is OFF
>> r>i5.5.0.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.1.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.2.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.3.0/24 5.5.0.5 0 100 0 ?
>> r>i5.5.4.0/24 5.5.0.5 0 100 0 ?
>> r>i6.6.0.0/24 6.6.0.6 0 100 0 ?
>> r>i6.6.1.0/24 6.6.0.6 0 100 0 ?
>> r>i6.6.2.0/24 6.6.0.6 0 100 0 ?
>> r>i6.6.3.0/24 6.6.0.6 0 100 0 ?
>> r>i6.6.4.0/24 6.6.0.6 0 100 0 ?
>> *> 7.7.0.0/24 0.0.0.0 0 32768 ?
>> *> 7.7.1.0/24 0.0.0.0 0 32768 ?
>> *> 7.7.2.0/24 0.0.0.0 0 32768 ?
>> *> 7.7.3.0/24 0.0.0.0 0 32768 ?
>>
>> I turn OFF SYN at R6 and everything has a RIB failure.. becoz OSPF is
>> running advertising all the loopbacks.!
>>
>> Is there any special thing to be noted while using SYNC with Route Reflectors.!
>>
>> Generally SYNC is OFF.. Just out of curiosity.!
>>
>>
>> Thanking You
>>
>> Yours Sincerely
>>
>> Divin Mathew John
>> divinjohn_at_gmail.com
>> divin_at_dide3d.com
>> http://www.dide3d.com
>> +91 9945430983
>> +91 9846697191
>> +974 5008916
>> PGP PUBLIC KEY BLOCK @ http://www.dide3d.com/divin_Public_PGP_key.txt
>> Sent from Bangalore, KA, India
>>
>>
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Received on Wed May 13 2009 - 23:10:45 ART