Chapter 4 Bgp-Based Vpws Autodiscovery; Configuring Vpws With Bgp Autodiscovery And Signaling - Cisco NCS 5500 Series Configuration Manual
Bgp configuration ios xr
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BGP-based VPWS Autodiscovery
An important aspect of VPN technologies is the ability of network devices to automatically signal to other
devices about an association with a particular VPN. Autodiscovery refers to the process of finding all the
provider edge routers that participates in a given VPWS instance.
The two primary functions of the VPWS control plane are: auto-discovery and signaling. Both of these
functions are accomplished with a single BGP Update advertisement.
When a VPWS cross-connect is configured with BGP auto-discovery and signaling enabled, BGP needs to
distribute NLRI for the xconnect with the PE as the BGP next-hop and appropriate CE-ID. Additionally, the
cross-connect is associated with one or more BGP export Route Targets (RTs) that are also distributed (along
with NLRI).
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Configuring VPWS with BGP Autodiscovery and Signaling
Perform this task to configure BGP-based autodiscovery and signaling.
Configuring VPWS with BGP Autodiscovery and Signaling, page 153
VPWS with BGP Autodiscovery and BGP Signaling, page 156
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
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