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The Border Gateway Protocol (BGP) provides loop-free interdomain routing between autonomous systems (ASs). This section describes some of the main concepts of BGP.
Two tasks are common to every BGP configuration: You must enable the BGP routing process, and you must configure BGP neighbors.
You will often want to apply the same policies to most or all of the peers of a particular BGP speaker.
Each BGP speaker advertises to its peers the routes to prefixes that it can reach.
BGP selects only one route to a destination as the best path. When multiple routes to a given destination exist, BGP must determine which of these routes is the best.
BGP requires that IBGP peers be fully meshed, creating significant routing overhead as the number of peers increases.
This chapter describes Multiprotocol Label Switching (MPLS) and contains the following sections: MPLS Overview on page 202, Conventions for MPLS Topics on page 202, MPLS Terms and Acronyms on page 203...
In conventional IP routing, as a packet traverses from one router to the next through a network, each router analyzes the packet’s header.
MPLS is not a routing protocol; it works with layer 3 routing protocols (BGP, IS-IS, OSPF) to integrate network layer routing with label switching.
Label distribution protocols create and maintain the label-to-FEC bindings along an LSP from MPLS domain ingress to MPLS domain egress.
In IP networks, the ping and traceroute commands enable you to verify network connectivity and find broken links or loops.
A point-to-multipoint MPLS LSP is an RSVP-TE LSP with a single ingress LSR and one or more egress LSRs.
Configuring an MPLS network includes a number of tasks: Configure settings common to all MPLS usage on a given LSR.
Complete these tasks to configure a virtual router as an LSR. You perform these commands in Global Configuration mode.
Creating or accessing an LDP interface profile places the CLI in LDP Configuration mode.
Creating or accessing an RSVP-TE interface profile places the CLI in RSVP Configuration mode.
These tasks are performed at the major interface over which you want to run MPLS.
You can use the baseline mpls commands to set a statistics baseline for MPLS operations.
To remove and re-create dynamic IPv4 interfaces and dynamic IPv6 interfaces from all MPLS major interfaces or a specific MPLS major interface.
Purpose: To trace paths through the MPLS user plane.
Purpose: Display information about ATM VCs used as MPLS LSPs and VPI-VCI ranges reserved for MPLS when you use the interface label space for MPLS labels.
Display configuration and statistics for all label-switched paths (LSPs) or for specific LSPs configured on the label-switching router (LSR).
This chapter describes how to configure layer 2 services over MPLS on the router, and contains the following sections: Layer 2 Services over MPLS Overview on page 509, Layer 2 Services over MPLS Platform Considerations on page 510...
Many Internet service providers offer multiple services such as Frame Relay, Asynchronous Transfer Mode (ATM), Ethernet, High-Speed Data Link Control (HDLC), and IP to their customers...
To configure layer 2 services over MPLS, you must first configure the underlying layer 2 service (ATM, bridged Ethernet, Fast Ethernet, Gigabit Ethernet, 10-Gigabit Ethernet, Frame Relay, or HDLC) and MPLS.
When layer 2 services are configured over MPLS, layer 2 traffic is encapsulated in MPLS frames and sent over MPLS tunnels.
You can configure layer 2 services over MPLS to transmit data between two layer 2 interfaces that reside on the same E Series router.
Before you configure layer 2 services over MPLS, you must configure the layer 2 interfaces and MPLS.
To configure Frame Relay layer 2 services over MPLS with the RFC-4619 Frame Relay pseudowire type.
To configure Ethernet/VLAN layer 2 services over MPLS.
When you configure Ethernet or bridged Ethernet layer 2 services over MPLS, you can use the svlan id command with the any keyword to create a stacked VLAN (S-VLAN) tunnel...
You can use the baseline mpls commands to set a statistics baseline for MPLS operations.
You can use the following clear commands to remove all dynamic (learned) MAC address entries or a specific dynamic MAC address entry...
You can use the show commands listed in Table 84 on page 617 to display VPLS settings related to transparent bridging.
Display configuration and statistics information for the specified VPLS instance.
Display configuration and statistics information for all VPLS instances configured on the router.
This chapter describes the virtual private LAN service (VPLS), and contains the following sections: VPLS Overview on page 575, VPLS Components on page 576...
JUNOSe software enables you to configure one or more instances of VPLS, referred to as VPLS instances, on the router.
As illustrated in Figure 128 on page 576, a typical VPLS topology consists of the following components.
BGP multiprotocol extensions (MP-BGP) enable BGP to support IPv4 services such as BGP/MPLS VPNs...
When you configure VPLS with LDP signaling, LDP supports a full mesh of pseudowires among the participating PE routers.
You can configure BGP multihoming in the VPLS network to provide redundancy in the event of failures...
The JUNOSe implementation of VPLS uses features of transparent bridging, BGP, MPLS, BGP/MPLS VPNs, and layer 2 services over MPLS.
To configure VPLS with BGP signaling on the PE router: Configure a single instance of VPLS, known as a VPLS instance...
You must configure a VPLS instance for each VPLS domain in which the router participates.
You can configure BGP multihoming in the VPLS network to provide redundancy in the event of failures...
After you create a basic VPLS instance, you can configure one or more optional attributes to manage the MAC address entries in the VPLS instance’s forwarding table...
You can use the following baseline commands to set a statistics baseline for a VPLS instance...
You can use the following clear commands to remove all dynamic (learned) MAC address entries or a specific dynamic MAC address entry...
You can use the show commands listed in Table 84 on page 617 to display VPLS settings related to transparent bridging.
Display configuration and statistics information for the specified VPLS instance.
Display configuration and statistics information for all VPLS instances configured on the router.
This chapter describes virtual private wire service (VPWS) L2VPNs, and contains the following sections: VPWS Overview on page 645, BGP Signaling for L2VPNs on page 647...
VPWS L2VPNs employ layer 2 services over MPLS to build a topology of point-to-point connections that connect end customer sites in a VPN.
When you configure VPWS at a given PE router for a given L2VPN customer, BGP signals reachability for all sites that belong to that L2VPN.
As illustrated in Figure 132 on page 648, a typical VPWS L2VPN topology consists of the following components.
BGP multiprotocol extensions (MP-BGP) enable BGP to support IPv4 services such as BGP/MPLS VPNs...
BGP multihoming enables you to connect a customer site to two or more PE routers to provide redundant connectivity...
The JUNOSe software implementation of VPWS uses features of BGP, MPLS, BGP/MPLS VPNs, and layer 2 services over MPLS.
To configure a PE router to provide VPWS: Configure an VPWS instance.
You must configure a VPWS instance for each L2VPN in which the router participates.
You can configure BGP multihoming in the VPWS network to provide redundancy in the event of failures...
You must configure one of the following types of interfaces as a member of the VPWS to transmit packets between the PE router and each CE device to which the PE router is connected.
You can use the following clear ip bgp commands to remove specific BGP attributes for the L2VPN address family...
This section provides examples of some of the show ip bgp commands that you can use to monitor VPWS configurations.
Display information about BGP next hops in the L2VPN address family or in the VPWS address family.
Display configuration and status information for VPWS L2VPN connections configured on the router.
To display configuration and status information for VPWS instances configured on the router.
Index of topics and commands.
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