Versatile Routing and Services with BGP: Understanding and by Alcatel-Lucent, Colin Bookham

By Alcatel-Lucent, Colin Bookham

Design a strong BGP regulate airplane inside of a safe, scalable community for smoother services

A powerful Border Gateway Protocol setup is essential to making sure trustworthy connectivity, a necessary potential for any association. the web has turn into an important, always-on provider in houses and companies, and BGP is the protocol that retains conversation flowing. yet BGP additionally has turn into the most important to supply of intra-domain enterprise providers. however the community is simply as trustworthy as BGP, so provider enablement is dependent upon making BGP extra strong, trustworthy, and service-rich.

Alcatel-Lucent provider Router working procedure is engineered to undergo the burden of the main not easy networks. The method beneficial properties aid for Symmetric Multiprocessing and unheard of intensity of complex routing good points, all inside a unmarried OS that is supported around the complete Alcatel-Lucent IP/MPLS router portfolio. Versatile Routing and companies with BGP provides assistance towards implementation of BGP inside of SR-OS, and info the use and keep an eye on of every characteristic. The booklet presents in-depth assurance of subject matters such as:

  • Labeled Unicast IPv4, reconvergence, and multicast
  • Security, swish restart and mistake handling
  • IPv6 PE (6PE) and IPv6 extensions to BGP/MPLS IP-VPN
  • A examine impending good points similar to Ethernet VPN

Basic BGP competency is thought, however the publication is offered even to these with 0 familiarity with Alcatel-Lucent's SR-OS. It underscores the concept BGP is greater than simply provider enablement, and will even be used for infrastructure layer shipping - yet either layers has to be good, scalable, and ready to fast reconverge. Versatile Routing and providers with BGP demonstrates the construction of a powerful BGP regulate airplane inside a, safe community, permitting the supply of faultless, uninterrupted provider.

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Extra info for Versatile Routing and Services with BGP: Understanding and Implementing BGP in SR-OS

Example text

Again, from a configuration perspective, this output requires very little discussion. Moreover, the Next-Hop issues observed with the single IPv4 BGP session at PE1 are not observed here because by default all IPv4 BGP UPDATEs use PE2’s IPv4 WAN address and all IPv6 BGP UPDATEs use PE2’s IPv6 WAN address. 6 family ipv4 export "ex-ebgp-4001" peer-as 64510 exit neighbor 2001:DB8:1B0C:2101::3 family ipv6 export "ex-ebgp-4001" peer-as 64510 exit exit no shutdown exit no shutdown At CE2, a check of the respective route-tables in Output 2-18 and Output 2-19 shows that both IPv6 and IPv4 prefixes are learned through each BGP session and are populated into the associated route-tables.

ORF allows a BGP speaker to send to a BGP peer a set of filters that the peer should apply on its Adj-RIB-OUT. ORF entries are carried within Route Refresh messages and are encoded as: • AFI/SAFI, defining the NLRI type • ORF-type, defining the content of the ORF-value • Action, defining whether to add or remove the filter • A match statement in the form of permit or deny (where a permit asks the peer to send the set of routes that match the signaled ORF entry) SR-OS supports the Extended Community (Route Target) ORF-type and it is enabled by configuring the outbound-route-filtering context followed by the command extended-community and an option or either accept-orf or send-orf.

To participate in the BGP/MPLS IP-VPN control plane, the definition of Route Target values is required for import and export of VPN-IPv4 prefixes. The simplest method is using the vrf-target command followed by a Route Target value that has the same format as the Route Distinguisher. The vrf-target command allows for definition of a single value applicable to import and export Route Targets as shown in Output 2-1, or it allows for definition of different import and export Route Target values using the export and import keywords after the vrf-target command, followed by the relevant Route Target values.

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