Edge Connection

Version:

Edge Connection Between Border and External Devices

NDFC enables seamless interconnection between two fabrics using edge connections based on BGP. This approach leverages two built-in NDFC policies: bgp_peer_template_dci_underlay_jython and ebgp_underlay_dci_template. These policies automate the creation of BGP peer templates by specifying neighbor information, adding the appropriate neighbor statements under the fabric ASN, and configuring source interfaces—including IP addresses and related parameters.

Diagram

Classes

topology (vxlan)

Name	Type	Constraint	Mandatory	Default Value
edge_connections	List	`[edge_connections]`	No

edge_connections (vxlan.topology)

Name	Type	Constraint	Mandatory
dest_fabric	String		Yes
dest_device	String		Yes
dest_interface	String		No
source_device	String		Yes
source_interface	String		Yes
source_interface_enabled	Boolean	`true`, `false`	No
local_ip	IP		Yes
neighbor_ip	IP		Yes
bgp_section	Class	`[bgp_section]`	No

bgp_section (vxlan.topology.edge_connections)

Name	Type	Constraint	Mandatory
bgp_password_enable	Boolean	`true`, `false`	No
bgp_password	String		No
neighbor_asn	String	Regex: `^(?:\d{1,10}\|\d{1,5}\.\d{1,5})$`	Yes
routing_tag	Integer	min: `0`, max: `4294967295`	No
description	String		No
peer_template_freeform	String		No
interface_freeform	String		No
bgp_freeform	String		No

Examples

vxlan:
  topology:
    edge_connections:
      - dest_fabric: external
        source_device: dc1-border1
        dest_device: NCS-5500-1
        source_interface: eth1/10
        dest_interface: FortyGigE0/0/0/1
        local_ip: 12.32.0.16/31
        neighbor_ip: 12.32.0.17
        bgp_section:
          bgp_password: 70617373776f7264313233
          neighbor_asn: "69999"
          description: "test1"
          interface_freeform: "  no ip redirects"
          bgp_freeform: |2-
                description dc1-border1
          peer_template_freeform: |2-
                  soft-reconfiguration inbound always
                  route-map underlay-in in
                  route-map underlay-outbound out
                bfd
      - dest_fabric: external
        source_device: dc1-border1
        dest_device: NCS-5500-2
        source_interface: eth1/11
        dest_interface: FortyGigE0/0/0/1
        local_ip: 12.32.0.18/31
        neighbor_ip: 12.32.0.19
        bgp_section:
          bgp_password: 70617373776f7264313233
          neighbor_asn: "69999"
          interface_freeform: "  no ip redirects"
          bgp_freeform: |2-
                description dc1-border1
          peer_template_freeform: |2-
                  soft-reconfiguration inbound always
                  route-map underlay-in in
                  route-map underlay-outbound out
                bfd

router bgp 69998
  neighbor 12.32.0.17
    inherit peer dc1-border1-NCS-5500-1-IPV4-EBGP
    description dc1-border1
  template peer dc1-border1-NCS-5500-1-IPV4-EBGP
    remote-as 69999

    password 3 70617373776f7264313233
    address-family ipv4 unicast

      send-community both
      next-hop-self
      soft-reconfiguration inbound always
      route-map underlay-in in
      route-map underlay-outbound out
    bfd

interface Ethernet1/10
  no switchport
  ip address 12.32.0.16/31
  evpn multisite dci-tracking
  mtu 9216
  no shutdown
  no ip redirects
  description test1

router bgp 69998
  neighbor 12.32.0.19
    inherit peer dc1-border1-NCS-5500-2-IPV4-EBGP
    description dc1-border1
  template peer dc1-border1-NCS-5500-2-IPV4-EBGP
    remote-as 69999

    password 3 70617373776f7264313233
    address-family ipv4 unicast

      send-community both
      next-hop-self
      soft-reconfiguration inbound always
      route-map underlay-in in
      route-map underlay-outbound out
    bfd

interface Ethernet1/11
  no switchport
  ip address 12.32.0.18/31
  evpn multisite dci-tracking
  mtu 9216
  no shutdown
  no ip redirects
  description Device dc1-border1 to Device NCS-5500-2