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Q-in-Q questions

  • 1.  Q-in-Q questions

    Posted 27 days ago

    I came across a variety of Q-in-Q configurations, I am configuring them in the labs. The following is one I am working on it, unfortunately I could not get it working now.

    [EX/QFX] How to configure QinQ using ELS on Junos OS

    I sniffed the ARP traffic on PE-2 on ge-0/0/1 to notice both vlan tags are popped, so arp request from CE-1 goes to CE-2 without any tag. so CE-2 does not reply.

    Can anyone take a look the link above to see any more configuration I need to add ?

    Note: I am testing in vQFX .

    thanks a lot in advance !!



  • 2.  RE: Q-in-Q questions

    Posted 26 days ago

    I used vQFX 18.4, today I loaded version 19.4. the same result.

    here is my topology.

    the following is my configuration

    root@vQFX-5# show interfaces xe-0/0/0 | display set
    set interfaces xe-0/0/0 flexible-vlan-tagging
    set interfaces xe-0/0/0 encapsulation extended-vlan-bridge
    set interfaces xe-0/0/0 unit 10 vlan-id 10

    {master:0}[edit]
    root@vQFX-5# show interfaces xe-0/0/1 | display set
    set interfaces xe-0/0/1 flexible-vlan-tagging
    set interfaces xe-0/0/1 encapsulation extended-vlan-bridge
    set interfaces xe-0/0/1 unit 10 vlan-id-list 100
    set interfaces xe-0/0/1 unit 10 input-vlan-map push
    set interfaces xe-0/0/1 unit 10 output-vlan-map pop

    {master:0}[edit]
    root@vQFX-5# show vlans | display set
    set vlans default vlan-id 1
    set vlans vlan10 interface xe-0/0/0.10
    set vlans vlan10 interface xe-0/0/1.10

    root@vQFX-6# show interfaces xe-0/0/0 | display set
    set interfaces xe-0/0/0 flexible-vlan-tagging
    set interfaces xe-0/0/0 encapsulation extended-vlan-bridge
    set interfaces xe-0/0/0 unit 10 vlan-id 10

    {master:0}[edit]
    root@vQFX-6# show interfaces xe-0/0/1 | display set
    set interfaces xe-0/0/1 flexible-vlan-tagging
    set interfaces xe-0/0/1 encapsulation extended-vlan-bridge
    set interfaces xe-0/0/1 unit 10 vlan-id-list 100
    set interfaces xe-0/0/1 unit 10 input-vlan-map push
    set interfaces xe-0/0/1 unit 10 output-vlan-map pop

    {master:0}[edit]
    root@vQFX-6# show vlans | display set
    set vlans default vlan-id 1
    set vlans vlan10 interface xe-0/0/0.10
    set vlans vlan10 interface xe-0/0/1.10

    packet captured on xe-0/0/0 on vQFX-6

    packet captured on xe-0/0/1 on vQFX-6

    I spent a couple of days on it. I like to confirm the configuration is OK. the issue might be caused by the vQFX image.

    thanks a lot  in advance !!