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#Juniper vpls mac address learning show how to#
#Juniper vpls mac address learning show full#

The Outer label is the transport mechanism that allows the frame from egress interface from the sending PE to ingress interface of the receiving PE. Martini: The Martini style of L2VPN has a pair of labels before the L2 frame.LSPs are manually created on each PE to determines which circuit the frame belongs to on the other end. CCC can ONLY use RSVP as MPLS transport, in addition each CCC connection has its own dedicated RSVP-signalled LSP associated, the transport label cannot be shared between multiple connections.

Circuit Cross-Connect: The Circuit Cross-Connect style of L2VPN uses a single Outer Label, also known as the Tunnel/Transport Label, to transport L2 payload from PE to PE.

Kompella and Martini are regarded as the industry standard, with Circuit Cross-Connect (CCC) seen as legacy: Within Junos there are 3 ways of configuring L2VPNs, two are regarded as modern way and has been rectified with RFC’s with an additional legacy method. If you need multiple sites on the same layer 2 broadcast you will need to consider Virtual Private Lan Service (VPLS) or Ethernet VPN (EVPN). In essence, L2VPNs are virtual point-to-point circuit that use the underlying Transport Labels (LDP/RSVP) or a statically defined MPLS path to go between two PE’s, that allows the extension of a layer 2 broadcast domain. Each PE device is responsible for allocating customer Layer 2 frames to the appropriate VPWS and for proper forwarding to the intended destinations. VPWS applies for all services, including Ethernet, ATM, Frame Relay, etc. These tunnels can either be specific to a particular VPWS, or be shared among several services. Layer 2 circuits are then mapped onto tunnels in the SP network. PE devices act as Layer 2 circuit switches. The PE devices provide a logical interconnect such that a pair of CE devices appears to be connected by a single logical Layer 2 circuit. L2VPN, also known as a pseudowire, is defined in RFC4665, where they are called Virtual Private Wire Service (VPWS):

#Juniper vpls mac address learning show how to#

This post will over note how to configure L2VPN with Junos 😀 As we have a MPLS enabled network, it was decided that would be the easiest way to get their POC up and running quickly, as we were under a bit of a hard deadline!įor me, it was good little project, even though I know what L2VPNs were and how they work, I had never configured one myself. As this circuit is being using as a POC (for now), it was agreed that a Layer 2 VPN (L2VPN/pseudowire) will be best suited, because a simple point-to-point connection was needed between two PEs.

With that being said, I’ve been given a wee project to provision a circuit for a business customer between two sites for a Proof Of Concept.

#Juniper vpls mac address learning show full#

It has been a busy few weeks trying to stay ahead of all the new work that has been coming towards myself and the team, due to the in sourcing of the core network! Lucky enough for my team, we have finally got our hands onto full end-to-end connectivity! Fun times 😀