[j-nsp] Debug ip packet equivalent for directed at RE traffic

[Alex K.]

Thank you Tim and Chris,

But correct me if I'm wrong - those are not quite the same thing.

There's no doubt packets are reaching the box (I have PC connected directly
to the switch).

The difference between traffic monitoring/mirroring and Ciscos' debug, is
that with debug you follow the path a packet takes.

Traffic monitoring can be a really helpful first step (as I've said, there
virtually no doubt the packets are reaching the RE), but my question is
about - what's next?

Assumed you see only echo requsts and no replies (by "monitor traffic", for
example), is there is a trace option to show why an EX decided it shouldn't
answer with reply (from its own address)?

בתאריך 28 בנוב' 2016 8:45 PM,‏ "Tim Jackson" <jackson.tim at gmail.com> כתב:

> monitor traffic interface ge-0/0/0 size XXXX no-resolve layer2-headers
> extensive
>
> --
> Tim
>
> On Mon, Nov 28, 2016 at 12:43 PM, Alex K. <nsp.lists at gmail.com> wrote:
>
>> Hello everyone,
>>
>> By any chance - is there an equivalent for Ciscos' "debug ip packet"
>> command in Juniper?
>>
>> I'm fully aware that there is a complete distinction between forwarding
>> layer and control layer, in those devices - But,  I'm taking specifically
>> about traffic TARGETING the box itself.
>>
>> I'm troubleshooting a strange behavior by Juniper EX line. It's a compex
>> topology but the issue is very simple: under certain circumstances, an EX
>> stop responding even to pings to its own addresses, even from directly
>> connected interfaces.
>>
>> I'm fully aware that I can mirror a port on those machines (and such), but
>> mirroring alone, will not answer the million dollar question - why?
>>
>> Since there is no doubt that packets are reaching the box (packets don't
>> leak from a directly connected cable, with PC on its other end) - I was
>> hoping, Juniper might have provided us with a trace option, for following
>> the packet inside the box?
>>
>> Anyone know such trace option?
>>
>>
>> Any suggestions will be welcomed.
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>
>