[j-nsp] A wierd problem with QinQ at QFX5100

[Alexandre Guimaraes]

Andrew

Unfortunately, Allan is correct... don't expect use QinQ in ELS system, will be very annoying trying to find a way the let the packets flow inside. And they don't flow gracefully....

A friend told to me:  QFX are Ferraris.... I answer him: then Juniper, don't knows how to drive.
 :)

att
Alexandre

> Em 23 de mai de 2017, às 06:00, Allan Eising <eising at nordu.net> escreveu:
> 
> Excerpts from Andrew Osnach's message of May 23, 2017 10:31 am:
>> Hello,
>> 
>> I have a mixed VC (QFX5100 and 3500, if it means) with 14.1X53-D40.8.
>> There's an interface that incapsulates C-VLANs into S-VLAN:
>> 
>> set interfaces ae31 flexible-vlan-tagging
>> set interfaces ae31 mtu 9216
>> set interfaces ae31 encapsulation extended-vlan-bridge
>> set interfaces ae31 unit 3174 vlan-id-list 21-22
>> set interfaces ae31 unit 3174 input-vlan-map push
>> set interfaces ae31 unit 3174 input-vlan-map vlan-id 3174
>> set interfaces ae31 unit 3174 output-vlan-map pop
>> 
>> The other side:
>> 
>> set interfaces ae0 flexible-vlan-tagging
>> set interfaces ae0 mtu 9216
>> set interfaces ae0 encapsulation extended-vlan-bridge
>> set interfaces ae0 unit 3174 vlan-id 3174
>> 
>> S-VLAN configured like this:
>> set vlans sv3174-qinq interface ae0.3174
>> set vlans sv3174-qinq interface ae31.3174
>> 
>> At this point everything works fine, but if I create a VLAN with the
>> same ID as a C-VLAN (21 or 22):
>> set vlans v21-user vlan-id 21
>> the traffic in the C-VLAN 21 stops.
>> When I delete v21-user the traffic in C-VLAN 21 restores.
>> 
>> What's wrong with it and how can I fix it?
>> 
> 
> Hi,
> 
> QinQ on the QFX and all the other boxes running the ELS style is a bit
> of an abomination.
> 
> VLANs configured with extended-vlan-bridge interfaces are forwarded
> using a different daemon than VLANs forwarded using the
> classic ethernet-switching daemon.
> 
> It's quite likely that you cannot share VLAN IDs between the two methods of forwarding.
> 
> I would bug Juniper about this, but I wouldn't expect them to be able to
> fix it.
> 
> Best regards,
> 
> Allan Eising
> 
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