[j-nsp] Capturing/displaying contents of incoming packets

[Kevin Cullimore]

On 4/16/2012 4:35 AM, Phil Mayers wrote:
> On 04/15/2012 09:01 AM, Daniel Roesen wrote:
>> On Fri, Apr 13, 2012 at 04:17:51PM +0100, Phil Mayers wrote:
>>> On 13/04/12 16:11, Jose Madrid wrote:
>>>> Why not just use "monitor interface"?  I have used it in the past 
>>>> and its a
>>>> tcp-dump like output.
>>>
>>> That just shows control-plane packets.
>>
>> And only those control-plane packets which go from/to the routing
>> engine. Packets handled by distributed PPM on the linecards won't show
>> up. E.g. BFD, LACP, ...
>
> Interesting. I didn't know that (but then we don't have any 
> distributed Juniper kit at the mo). Useful to know, but not useful for 
> it to be that way ;o)
On at least some combinations of hardware/software you can disable PFE 
PPM processing, which at least leaves you with some decent visibility 
for intermediate-system to intermediate-system basic connectivity 
troubleshooting.
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