[j-nsp] MX80 MPLS L3VPN Fragment drops

[Tima Maryin]

On 06.11.2012 18:57, Leigh Porter wrote:
>> * Leigh Porter <leigh.porter at ukbroadband.com> [2012-11-06 00:46]:
>>> A packet dump reveals that the TCP sender (FTP server) will send a
>>> segment, the LTE core will encap this segment and fragment the tunnel
>>> packet, these fragments enter into an MX80 and into a L3VPN instance
>>> but then only the first half of the fragmented datagram ever exits
>> the
>>> MX80 as an MPLS packet.
>>
>> Hi Leigh,
>>
>> you might be hitting PR736749:
>
> In L3VPN scenario, transit packets which require fragmentation, traversing over the
> mpls core, might get dropped at the egress PE, if the egress PE?s, CE facing interface
> is on trio chipset cards. [PR736749: This issue has been resolved.]
>
> It looks like that, but the packet was already fragmented and it was on ingress of a PE ;-)



That description is not very precise. It affects also transiting 
fragments. I'm sure you're hitting this bug.



>> Which JunOS Version are you using?
>
> 10.4R1.5