300-620 · Question #143
What is MP-BGP used for in Cisco ACl fabric?
The correct answer is A. MP-BGP VPNv4 AF is used to propagate L3Out routes that are received from a border leaf to the. In Cisco ACI, MP-BGP with the VPNv4 Address Family is used to propagate external Layer 3 routes (L3Out routes) from border leaf switches to the spine switches within the fabric.
Question
What is MP-BGP used for in Cisco ACl fabric?
Options
- AMP-BGP VPNv4 AF is used to propagate L3Out routes that are received from a border leaf to the
- BMP-BGP VPNv4 AF is used between spines in an ACI Multi-Pod fabric to propagate the endpoint
- CMP-BGP VPNv4 AF is used as protocol on L3Out between a border leaf and an external router
- DMP-BGP Layer 2 VPN EVPN AF is used to propagate L30ut routes that are received from a border
How the community answered
(37 responses)- A92% (34)
- C3% (1)
- D5% (2)
Why each option
In Cisco ACI, MP-BGP with the VPNv4 Address Family is used to propagate external Layer 3 routes (L3Out routes) from border leaf switches to the spine switches within the fabric.
MP-BGP VPNv4 AF (Address Family) is the internal routing protocol used in the ACI fabric to distribute routes learned from external networks via border leaf switches to the spine switches.
MP-BGP VPNv4 AF is not used to propagate endpoint information within a single ACI fabric pod; COOP handles endpoint learning, and MP-BGP EVPN is used for endpoint exchange between pods in Multi-Pod.
L3Outs use standard BGP, OSPF, or EIGRP to exchange routes with external routers, not MP-BGP VPNv4, which is an internal fabric protocol.
L3Out routes are propagated using the VPNv4 AF, not the Layer 2 VPN EVPN AF, which is primarily for extending Layer 2 and Layer 3 overlays in Multi-Pod/Multi-Site deployments.
Concept tested: Cisco ACI internal routing - MP-BGP VPNv4 AF
Source: https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/5x/l3out-design/cisco-aci-l3out-design-guide-50.html
Topics
Community Discussion
No community discussion yet for this question.