Re: [C-bgp-users] Loading MRT files in a CBGP router

[Roderick <rod...@im...>]

Hi Bruno,

Thank you for the quick reply. And I sincerely thank you for having released such a great and useful tool.

Please find attached the topology (Sorry I forgot to add it) and the file ASes_in_topo.txt; 
Thanks for updating the c-bgp so that it now reports the detailed error code from the MRT parser :This will allow to debug easier. 

After suppressing the line TABLE_DUMP|1122859488|B|LOCAL|LOCAL|0.4.0.0/16||IGP|0.4.0.0|0|0|||||, I confirm it always load the RIB. 

Next, (for checking) I try to download the RIB of all routers with the command $cbgp->send("bgp router $line show rib * --output=final_ribs/final_RIB-$line.txt\n");

However, the routes still do not appear in the RIB. I am currently digging into it. 

BR, 

Roderick



On Feb 27, 2016, at 6:33 AM, Bruno Quoitin <bru...@um...> wrote:

> For what concerns the use of "virtual peers", have a look at 
> 
>     examples/example-virtual-peer.cli
> 
> BR,
> Bruno
> 
> 
> On 27/02/16 01:58, Roderick wrote:
>> Dear all, 
>> 
>> I am trying to load RIBs in CBGP routers (this is compulsory for scaling down the AS topology.). 
>> 
>> So, I am using the script (1_load_topology_v5.pl). An example of MRT file I want to load is "modified_RIB-4.txt" that contains the RIB of AS4. 
>> 
>> When I try to load the whole file, I can not:
>> 
>> cbgp> init.
>> cbgp> bgp topology load 01_topology_to_load.txt
>> cbgp> bgp topology install
>> cbgp> bgp topology policies
>> cbgp> bgp topology run
>> cbgp> sim run
>> cbgp> bgp router AS4 load rib modified_ribs/modified_RIB-4.txt
>> Error: command failed
>>  +-- reason: could not load "modified_ribs/modified_RIB-4.txt" (plop, at line XX)
>> cbgp> bgp router AS4 load rib modified_ribs/modified_RIB-4.txt
>> Error: command failed
>>  +-- reason: could not load "modified_ribs/modified_RIB-4.txt" (plop, at line XX)
>> 
>> 
>> But when I try with small part of it (test.txt), It does load (sometimes it does not and I get the same error): 
>> 
>> cbgp> bgp router AS4 load rib test.txt
>> cbgp> bgp router AS4 show rib *
>> cbgp> sim run
>> 
>> 
>> You’ll also remark that I after loading the file, nothing appears  in the rib (after launching bgp router AS4 show rib *). 
>> 
>> 1- Does the size of the MRT file matter ?
>> 
>> 2- Why doesn’t the routes appear in the RIB after loading and running sim run?
>> 
>> 4- Do you have any advice on how I should proceed ? Isn’t the format of the MRT file right (I am quite sure of it)?
>> 
>> 3- The other option I have is to use virtual peers and feed the routers with update messages.  Have you ever used a virtual peer to feed updates messages in a CBGP router ? If yes, what setup do you advice me ? 
>> 
>>     PS: If I choose that option, I would need about 600 virtual peers. 
>> 
>> Thank you for your help,
>> 
>> Best regards, 
>> 
>> Roderick
>> 
>> 
>>  
>