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ACI EBGP Routing for External Layer 3 Connectivity

ACI EBGP Routing for External Layer 3 Connectivity

Posted on Jan 24, 2020 (0)

LAB:ACI EBGP Routing for External Layer 3 Connectivity

Topology:

TASK: Follow the below following task to configure eBGP Routing to reach External Network subnets which is behind External Switch.

TASK 1 Create External Routed Network with following details:

  • Create External Routed outside network with name DCL-BGP-EXTERNAL-ROUTED-NW on VRF DCLessons_VRF and attach the External Routed Domain you created in previous LAB named DCL-EXTERNAL-ROUTED-DOMAIN.
  • Enable BGP
  • Use Node profile named DCL-BGP-NODE-PROFILE with Node ID 102, Router-ID 102.11.1.2 and Router-ID as Loopback Interface: checked
  • Create BGP Interface Profile named DCL-BGP-INT-PROFILE , Create SVI for Leaf 102/e1/5, encap vlan 114 with ip address 100.11.13.2/24
  • Create External EPG DCL-BGP-EXTERNAL-EPG with subnet 11.2.4.0/24
  • Create a e-BGP peering between Leaf-2 and External Router select node 102/1/5 (100.11.13.2/24) with Peer profile and IP 100.11.13.1/24, Remote AS 20, Local AS 11.
  • Create a Contracts between named DCL-CONTRACT-BGP with subject name SUBJECT-ANY and enable Apply both direction and Reserve filter ports checked also use DCL-FILTER-ANY filter.
  • Use the above Contracts on Web_EPG on provided side and External EPG on Consumer side.
  • Associate External Routed network to bridge Domain DCLessons_DB and advertise the subnets to External Routed Network.

Solution:

TASK 1: Create External Routed Network with following details:

Create External Routed outside network with name DCL-BGP-EXTERNAL-ROUTED-NW on VRF DCLessons_VRF and attach the External Routed Domain you created in previous LAB named DCL-EXTERNAL-ROUTED-DOMAIN. Enable BGP

  • DCLessons | Networking | External Routed Networks.
  • Right-click the External Routed Networks and then select Create Routed Outside
  • In the Create Routed Outside wizard Create External Routed outside network with name DCL-BGP-EXTERNAL-ROUTED-NW on VRF DCLessons_VRF and attach the External Routed Domain you created in previous LAB named DCL-EXTERNAL-ROUTED-DOMAIN.
  • Select the BGP

Use Node profile named DCL-BGP-NODE-PROFILE with Node ID 102, Router-ID 102.11.1.2 and Router-ID as Loopback Interface: checked

  • Click + sign on Node and Interface Profile and create as per following task mentioned DCL-BGP-NODE-PROFILE click on + sign on Node ID and Provide Node ID 102
  • check Router-ID as Loopback Interface

  • Create BGP Interface Profile named DCL-BGP-INT-PROFILE, use BGP Interface Policy created in TASK 1. Click + on BGP Interface Profile and use the value given in above task.

Click Next Click Next and click Port type SVI and enter Create SVI for Leaf 102/e1/5, encap vlan 112 with ip address 100.11.13.2/24

Click Ok, OK, and OK to configure EPG.

Create External EPG DCL-BGP-EXTERNAL-EPG with subnet 11.2.4.0/24

  • In External EPG Networks, in the External EPG Networks subsection, click the plus sign to create a new entry. In Create External Network wizard use Name field type DCL-BGP-EXTERNAL-EPG
  • In the Subnet subsection, click the plus sign to create a new entry. In Create Subnet wizard in IP Address field type use 11.2.4.0/24

Create a e-BGP peering between Leaf-2 and External Router select node 102/1/5 (100.11.13.2/24) with Peer profile and IP 100.11.13.1/24 , Remote AS 20 , Local AS 11.

In the Navigation pane, expand Tenant DCLessons | Networking | External Routed Networks > DCL-BGP-EXTERNAL-ROUTED-NW | Logical Node Profiles | DCL-BGP- NODE-PROFILE.


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