• Author : Pintu Kumar


Inter AS Option B

Description When two sites of a VPN are connected to PE routers from different Autonomous Systems (AS), the PE routers cannot directly use iBGP connections to exchange VPN-IPv4 and VPN-IPv6 prefixes between them. They need some way to use eBGP to distribute those prefixes. Inter AS Option B is one of the ways in which the PE routers from different ASes can exchange the VPN routes with each other as described in the multi-AS backbones section in RFC4364. This document describes Inter-AS Option B functionality in EOS. Please refer to this TOI for the basic BGP/MPLS L3 VPN functionality. Platform...
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BGP VPN and Inter-VRF Local Route Leaking Support for default VRF

Description This feature extends the BGP Layer 3 VPN Import/Export and VRF Route Leaking functionality to “default” VRF. Currently, these functionalities are only supported for non-default VRF. Please refer to this TOI for more details on the support for non-default VRF. EOS supports the following two types of VPN configurations and this feature is applicable for both. RFC 4364 BGP/MPLS L3 VPN (TOI Link) BGP L3 EVPN (TOI Link) This feature is available when configuring BGP in the multi-agent routing protocol model. Platform Compatibility DCS-7250 DCS-7050TX/SX/QX DCS-7060X DCS-7280R DCS-7500R Configuration Configuring BGP VPN in default VRF is similar to how it is...
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IS-IS Traffic Engineering

Introduction Traffic Engineering (TE) provides a mechanism to network administrators to control the path that a data packet takes, bypassing the standard routing model which uses routes along the shortest path. Traffic engineered paths are generally computed on the head-end routers of the topology based on various constraints (e.g. minimum bandwidth, affinity) configured for those paths and attributes (e.g available bandwidth, color) received from devices in the network topology. IS-IS Traffic Engineering (IS-IS TE) feature extends IS-IS protocol in EOS to carry TE attributes as part of its Link State Protocol Data Units (LSPs).  Note that IS-IS in EOS only...
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