Supported Dynamic Routing Protocols for Cisco ACI
Question
Which two dynamic routing protocols are supported when using Cisco ACI to connect to an external Layer 3 network? (Choose two.)
Answers
Explanations
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https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/ACI_Best_Practices/b_ACI_Best_Practices/When connecting a Cisco ACI fabric to an external Layer 3 network, there are several routing protocols that can be used to exchange routing information between the ACI fabric and the external network. Two of the dynamic routing protocols that are supported by Cisco ACI for this purpose are iBGP and eBGP.
iBGP, or interior Border Gateway Protocol, is a routing protocol used to exchange routing information between routers within a single autonomous system (AS). In the context of Cisco ACI, iBGP can be used to exchange routing information between ACI spine switches and external routers within the same AS.
eBGP, or external Border Gateway Protocol, is a routing protocol used to exchange routing information between routers in different autonomous systems. In the context of Cisco ACI, eBGP can be used to exchange routing information between ACI spine switches and external routers in different ASes.
VXLAN, or Virtual Extensible LAN, is not a routing protocol but rather a network virtualization technology used to create overlay networks over existing Layer 3 networks. While VXLAN can be used to transport Layer 2 traffic over Layer 3 networks, it is not a routing protocol and therefore is not used for exchanging routing information between ACI and external networks.
IS-IS, or Intermediate System-to-Intermediate System, is a link-state routing protocol that can be used for exchanging routing information within a single AS or between ASes. While IS-IS is a supported routing protocol in Cisco ACI, it is not commonly used for connecting to external Layer 3 networks.
RIPv2, or Routing Information Protocol version 2, is a distance-vector routing protocol used to exchange routing information between routers. While RIPv2 is a supported routing protocol in Cisco ACI, it is not commonly used for connecting to external Layer 3 networks.
In summary, the two dynamic routing protocols supported when using Cisco ACI to connect to an external Layer 3 network are iBGP and eBGP.
