Configure BGP for VPN Connections

Before you begin, ensure you have completed the steps outlined in Add a VPN Connection to the Cloud Router.

Add BGP information to the Cloud Router connection

  1. After completing the steps above, return to the Cloud Routers page in the PacketFabric portal.

  2. Click the connection to open its side panel.

  3. Under BGP Sessions, click Create New Session.

    Screenshot of the Create New Session action

Complete the following fields and then click Submit.

BGP Settings

  • Header row

    • Field
    • Description

  • Row 1

    • PacketFabric ASN
    • This is the ASN you specified when creating your PacketFabric Cloud Router. You cannot edit this field.

  • Row 1

    • ASN
    • This is the ASN for your on-premises environment. If you have one, you can use your public ASN. Otherwise, you can select a private ASN from 64512 to 65534.

  • Row 1

    • PacketFabric Router Peer IP + Mask (CIDR notation)
    • Enter a private IP prefix of your choice.

  • Row 1

    • Router Peer IP + Mask (CIDR notation)
    • Assign a private IP address to the PacketFabric router.

  • Row 1

    • Allow longer prefixes

    • This applies to the allowed incoming and outgoing prefixes that you list below.

      For example, say you list 172.16.2.0/24 as an allowed incoming prefix. You have three other cloud connections with the following outgoing prefixes:

      Connection A: 172.16.2.0/24
      Connection B: 172.16.0.0/16
      Connection C: 172.16.2.128/25

      If you do not select this option, only routes from Connection A are allowed.

      If you select this option, routes from Connection A and Connection C are allowed.

Allowed prefixes to cloud

This is a list of addresses that you want to allow into your on-premises router. These can be addresses from other cloud environments or from a different router.

  • Row
    • Field
    • Description
  • Row

    • ASN prepend

    • Number of additional times to add the ASN to the BGP path, resulting in a higher path length.

      Routes with higher path length (a higher ASN prepend value) have a lower priority.

  • Row

    • MED

    • The multi-exit discriminator (MED) value.

      When the same route is advertised in multiple locations, those with a lower MED are preferred by the peer AS.

  • Row
    • Prefix/Mask
    • Enter an allowed IP address range in CIDR format. You can add up to 1000 prefixes.
Allowed prefixes from cloud

This is a list of addresses from within the on-premises environment that you want to advertise to other connections.

  • Row
    • Field
    • Description
  • Row
    • Local preference
    • When the same route is received in multiple locations, those with a higher local preference value are preferred by the PacketFabric Cloud Router.
  • Row
    • Prefix/Mask
    • Enter an allowed IP address range in CIDR format. You can add up to 1000 prefixes.

Updated on 17 May 2022