BGP newbie need help

[Ondrej Filip]

On 4.7.2010 19:19, Maciej Drobniuch wrote:
> 2010/7/4 Ondrej Filip<ondrej.filip at nic.cz>:
>> On 4.7.2010 17:27, Maciej Drobniuch wrote:
>>>
>>> Hi All!
>>> I have established a bgp session to my isp using bird.
>>> I have one problem. The session works great but it doesn't advertise
>>> my inetnum. I can't find it in the documentation how to define my
>>> inetnum and how to advertise it?
>>
>> Did you define some static routes?
> No, I did not. Should I create a static route for my self and
> redistribute it via bgp?

Yes, you should. Otherwise there is nothing to export. Which you can 
see from the output of show route preexport bgp1

You may add something like:

protocol static {
        route 192.168.1.0/24 reject;
}

Or this could be some real route in case you do not run some IGP. Or 
you can export some device route if it's e.g. some anycast node etc.

			Ondrej


>>
>> What is an output of
>>
>> show route preexport bgp1
>> and
>> show route export bgp1
>>
>> ?
>> birdc
> BIRD 1.2.3 ready.
> bird>  show route preexport bgp1
> bird>  show route export bgp1
> bird>
>
>>
>>                         Ondrej
>>
> BIG Thanks!
> Maciej
>>>
>>> My cfg:
>>> protocol bgp {
>>> #       disabled;
>>>          description "lol";
>>>          local as 51060;
>>>          neighbor 213.5.9.73 as 49895;
>>> #       multihop 20 via 62.168.0.13;
>>>          hold time 240;
>>>          startup hold time 240;
>>>          connect retry time 120;
>>>          keepalive time 80;      # defaults to hold time / 3
>>>          start delay time 5;     # How long do we wait before initial
>>> connect
>>>          error wait time 60, 300;# Minimum and maximum time we wait
>>> after an error (when consecutive
>>> #                               # errors occur, we increase the delay
>>> exponentially ...
>>>          error forget time 300;  # ... until this timeout expires)
>>> #       disable after error;    # Disable the protocol automatically
>>> when an error occurs
>>> #       next hop self;          # Disable next hop processing and
>>> always advertise our local address as nexthop
>>>          path metric 1;          # Prefer routes with shorter paths
>>> (like Cisco does)
>>>          default bgp_med 0;      # MED value we use for comparison when
>>> none is defined
>>>          default bgp_local_pref 0;       # The same for local preference
>>>          source address localip;      # What local address we use for
>>> the TCP connection
>>> #       password "idonotusemd5";     # Password used for MD5
>>> authentication
>>> #       rr client;              # I am a route reflector and the
>>> neighor is my client
>>> #       rr cluster id 1.0.0.1;  # Use this value for cluster id
>>> instead of my router id
>>> #       export where source=RTS_STATIC;
>>>          export filter {
>>>                  if source = RTS_STATIC then {
>>>                          bgp_community = -empty-; bgp_community =
>>> add(bgp_community,(51060,49895));
>>>                          bgp_origin = 0;
>>>                          bgp_community = -empty-;
>>> bgp_community.add((51060,49895));
>>>                          if (51060,49895) ~ bgp_community then
>>>                                  bgp_community.add((0, 1));
>>>                          if bgp_path ~ [= 51060 =] then
>>>                                  bgp_path.prepend(51060);
>>>                          accept;
>>>                  }
>>>                  reject;
>>> #               accept;
>>>          };
>>> }
>>>
>>> Big thanks !!!!
>>>
>>
>>
>> --
>>   (  CZ.NIC z.s.p.o.                              )
>>   -------------------------------------------------
>>   Ondrej Filip  -  CEO
>>
>>   Office : Americka 23, Praha 2,   Czech Republic
>>   Email  : ondrej.filip at nic.cz  http://www.nic.cz
>>   Private: feela at network.cz
>>   -------------------------------------------------
>>
>
>
>