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  • 1.  inter-connection between Bridge domain

    Posted 04-14-2020 15:44

    Capture.JPG

    Can I use lt-0/0/0 interface to connect two bridge domains?

    vMX-L2-R
    set interfaces ge-0/0/0 vlan-tagging
    set interfaces ge-0/0/0 encapsulation extended-vlan-bridge
    set interfaces ge-0/0/0 unit 0 vlan-id 600
    set interfaces ge-0/0/1 vlan-tagging
    set interfaces ge-0/0/1 encapsulation extended-vlan-bridge
    set interfaces ge-0/0/1 unit 600 vlan-id 600
    
    set routing-instances vs instance-type virtual-switch
    set routing-instances vs bridge-domains BD-inst vlan-id 600
    set routing-instances vs bridge-domains BD-inst interface ge-0/0/0.0
    set routing-instances vs bridge-domains BD-inst interface ge-0/0/1.600
    set routing-instances vs bridge-domains BD-inst interface lt-0/0/0.600 set routing-instances vs bridge-domains BD-inst routing-interface irb.600 set interfaces irb unit 600 family inet address 10.10.10.1/24

    set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 encapsulation extended-vlan-bridge set interfaces ge-0/0/2 mac 00:05:86:71:f0:02 set interfaces ge-0/0/2 unit 0 vlan-id 4081 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 encapsulation extended-vlan-bridge set interfaces ge-0/0/3 mac 00:05:86:71:f0:03 set interfaces ge-0/0/3 unit 4081 vlan-id 4081 set logical-systems LS interfaces irb unit 4081 family inet address 10.10.10.2/24 set logical-systems LS bridge-domains BD-2 domain-type bridge set logical-systems LS bridge-domains BD-2 vlan-id 4081 set logical-systems LS bridge-domains BD-2 interface ge-0/0/2.0 set logical-systems LS bridge-domains BD-2 interface ge-0/0/3.4081 set logical-systems LS bridge-domains BD-2 routing-interface irb.4081 set logical-systems LS bridge-domains BD-2 interface lt-0/0/0.4081 set interfaces lt-0/0/0 unit 600 encapsulation vlan-bridge set interfaces lt-0/0/0 unit 600 vlan-id 600 set interfaces lt-0/0/0 unit 600 peer-unit 4081 set interfaces lt-0/0/0 unit 4081 encapsulation vlan-bridge set interfaces lt-0/0/0 unit 4081 vlan-id 4081 set interfaces lt-0/0/0 unit 4081 peer-unit 600 root@vMX-L2-R# commit [edit interfaces] 'lt-0/0/0' VLAN-ID on peer-units 4081(LS) and 600 do not match. error: configuration check-out failed

    Normally I use physical cable to do this. It works .  But in EVE, I tried to use lt-0/0/0 interface. Can I do this ?

     

    thanks !!



  • 2.  RE: inter-connection between Bridge domain
    Best Answer

    Posted 04-14-2020 21:57

    Hello,

     


    @gongyayu wrote:

     

    Can I use lt-0/0/0 interface to connect two bridge domains?


     

    yes You can but You are missing this line:

     

    set chassis fpc 0 pic 0 tunnel-services bandwidth 1g

     

     


    @gongyayu wrote:

     I tried to use lt-0/0/0 interface. Can I do this ?

     



    I don't have experience with "EVE" but regular (v)MX suppots LT interfaces just fine - see above for necessary command line.

    And some more comments:

    1/ You are basically creating one big bridge domain/BD with this interconnect so what's the point here? You could create a single BD with all Ethernet interfaces mentioned and live happily ever after. I never use such BD interconnect in my designs, and never had to

     2/ If You are still insisting on this LT interconnect, then aligh VLAN-ids on both sides of LT interface pair. If You are worried about 802.1Q tags, then JUNOS BD has VLAN normalization enabled by default, so Your VLAN tags will get rewritten on entry to each BD automatically.

     

    HTH

    Thx

    Alex



  • 3.  RE: inter-connection between Bridge domain

    Posted 04-16-2020 06:28

    I do have that line.

    thanks !!



  • 4.  RE: inter-connection between Bridge domain

    Posted 04-17-2020 07:26

    Juniper JSPX mentioned the lt-0/0/0 only supports L3 inter-connection. L2 needs physical cable to inter connection.



  • 5.  RE: inter-connection between Bridge domain

    Posted 04-22-2022 17:04
    Hi,
    so this is mandatory if I want to bridge two interface so that they can access the IRB?
    encapsulation extended-vlan-bridge

    I am asking because I have only vlan-tagging on the main interface, and I can't make it to work without the mentioned knob.
    The problem is that there are other logical interfaces with production gear and I can't change anything.