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FAQ: Layer 2 Circuits and Layer 2 VPN on MX Series Routers

MPLS technology is evolving, with more services being offered using MPLS connectivity. Junos OS features are also evolving to implement these services on Juniper Networks routers. The most common MPLS connectivity services include: Virtual Private LAN Service (VPLS) Layer 3 virtual...

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What is the behavior of a virtual tunnel interface in different services routing instances?

Question What is the behavior of a virtual tunnel interface in different services routing instances? Answer If you configure a virtual tunnel (vt) interface on the egress PE router and that router is also a transit router for the point-to-multipoint LSP, the penultimate hop router sends...

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Can a Layer 2 circuit be terminated into VPLS?

Question Can a Layer 2 circuit be terminated into VPLS? Answer Yes, Junos OS Release 9.2 and later uses mesh groups to terminate pseudowire emulation (pseudowireE) into VPLS. You can terminate one pseudowireE per mesh group within the VPLS. A maximum of 16 mesh groups is supported per VPLS...

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FAQ: VPLS on MX Series Routers

MPLS technology is evolving, with more services being offered using MPLS connectivity. Junos OS features are also evolving to implement these services on Juniper Networks routers. The most common MPLS connectivity services include: Virtual Private LAN Service (VPLS) Layer 3 virtual...

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Which components are used in calculating the load balancing (hashing) algorithm for a link aggregation group?

Question Which components are used in calculating the load balancing (hashing) algorithm for a link aggregation group? Answer For Layer 3 traffic, the default components used to calculate the load balancing (hashing) algorithm for a link aggregation group (LAG) are the source address,...

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When one of the sites goes down in a single VPLS instance, why is there traffic loss on another site?

Question When one of the sites goes down in a single VPLS instance, why is there traffic loss on another site? Answer The following illustration shows a sample topology used to answer this question: A PE router has several site IDs configured within the same VPLS instance....

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What is the interworking scalability for mesh groups in VPLS LDP-BGP?

Question What is the interworking scalability for mesh groups in VPLS LDP-BGP? Answer You can have up to 14 mesh groups per VPLS on MX Series routers. For example, for a given VPLS instance, if you need LDP-BGP interworking, there must be one mesh group for every LDP-VPLS cloud that is...

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