[OOR-Users] Problems configuring oor on a openwrt router

[Albert López]

Hi,

I have tried the rloc probe with our Cisco box and it replies our Map 
Request Probe messages:

Sep 20 08:41:10.936: LISP: Received map request for IID 0 0.0.0.0/32, 
source_eid UNSPEC, ITR-RLOCs: 84.88.81.70, records 1, nonce 
0x36FFE15F-0x17B6CF26, probe
Sep 20 08:41:10.936: LISP: Processing map request record for EID prefix 
IID 0 0.0.0.0/32
Sep 20 08:41:10.936: LISP-0: IID 0 No local EID prefix covering map 
request for 0.0.0.0/32.
Sep 20 08:41:10.940: LISP-0: Sending dummy map-reply from 147.83.131.33 
to 84.88.81.70.

May be the difference is that my box is only configured as a PeTR

Anyway, I have checked how Cisco boxes send Map Request Probe to PeTR 
and they use 0.0.0.0/0 instead of 0.0.0.0/32. I have generated a new ipk 
file which will request for this EID prefix.

Could you try and let me know if it works with this change.

Best regards

Albert


On 20/09/16 00:12, Holger Zuleger wrote:
> Hi again,
>
>>> In your configuration you have rloc-probing enabled. The xTR node is
>>>
>>> sending probe messaged to the PeTR node but it doesn't receive any reply
>>> and after three retries it sets the RLOC of the PeTR to not reachable.
>> Ok, makes sense. Sorry this is something I could/should have found out
>> myself.
> ...
>
>> I will test the proposed config change later today and give you a
>> feedback if it was successful.
> Indeed this was the problem. Turning off the probing solved it.
>
> But I was a bit confused why the PeTR are not responding to the probe
> messages, and turned the lisp debugging on.
>
> When the oor router sends a probe message...
>
> [2016/9/19 22:29:33] DEBUG: Retry Map-Request Probe for locator
> 109.235.46.40 and EID: 0.0.0.0/32 (2 retries)
>
> I see something like this in the Cisco debug (the timers are not
> consistently, but I'm pretty sure that the output is related to the
> probe message):
>
> Sep 19 21:29:23.957: LISP: Received map request for IID 0 0.0.0.0/32,
> source_eid UNSPEC, ITR-RLOCs: 185.122.6.142, records 1, nonce
> 0x203CFDA2-0x77FCFDBB, probe
> Sep 19 21:29:23.957: LISP: Processing map request record for EID prefix
> IID 0 0.0.0.0/32
> Sep 19 21:29:23.957: LISP-0: IID 0 No local EID prefix covering map
> request for 0.0.0.0/32.
>
> Later on the oor router give up with:
> [2016/9/19 22:29:38] DEBUG: rloc_probing: No Map-Reply Probe received
> for locator 109.235.46.40 and EID: 0.0.0.0/32 -> Locator state changes
> to DOWN
>
> So two question came up in my mind
> 1) Is the common way to probe a PeTR to send a map request for EID
> 0.0.0.0/32, and why is the src_EID unspecified?
> 2) Does it mean I have to install a local mapping for this on the PeTR
> router? And if yes how does it look like?
>
> Best Regards
>   Holger
>


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