dmvpn interview questions

DMVPN technology is a Cisco IOS Software solution for building scalable dynamic virtual tunnel between multiple branch locations over the internet.Dynamic Multipoint VPN (DMVPN) technology is blend of GRE, NHRP and IPsec. At what layer IPsec works? Public – NBMA – Underlay address : All these terms can be used interchangeably and refers to a static known address on the hub and a dynamic or static address on the spokes.This address is used to bring up the tunnels. Type “static” means NBMA address is statically configured. 29 Aug 2020. In Phase 1, hub is the next hop.Thus, spokes have to have a reachability to the tunnel addresses of each other.This disallows the summarization or default routing from Hub down to the spokes.This is a serious design limitation for the large scale DMVPN networks.For the distance vector protocols, Split horizon needs to be disabled and “no next-hop self” should be enabled on the HUB.These are serious design limitations for the link state protocols that I will explain later in this post.Spokes don’t have to have the next hop of each other’s private address for the local subnets.192.168.2.0/24 network behind the Spoke 2, has a next hop as HUB in the routing table of Spoke1.An NHRP redirect message is sent to the spokes to trigger spoke to spoke tunnels.

The picture below has been received from cisco.com.1. © 2020, I-Medita Learning Solutions. What is the algorithm used by OSPF? Internet traffic doesn’t have to go the HUB.Although Phase 1 is obsolete and, as we will see, Phase 3 gives better scalability and feature sets, it still might be used. Remote or Local address : This address is used in the local area and advertised through the routing protocol over the overlay DMVPN tunnel.In the topology above, spokes or remote sites register to the hub via NHRP protocol.The NHRP register message is used for spokes to register their underlay to overlay address mapping.DMVPN hub knows all the public IP to tunnel IP mapping before the routing protocol starts to advertise local addresses.DMVPN supports IPv4 and IPv6 unicast and multicast transport through the overlay tunnels.DMVPN also supports IPv4 and IPv6 transport through the underlay, which might be Internet or MPLS VPN.DMVPN can be used without IPsec encryption. You also find all interview questions … CCNP. What are the characteristics of OSPF ? Thank you in advance forward ctms.voip at g mai ldot comHi, can anyone send the latest dumps including the simulations please. We've gathered together the most common questions so you can get your preparation off to a flying start. The Hub can only send default route as well ,since the remote spokes next hop is not preserved by the Hub.Hub changes the IGP next hop to itself hence spoke to spoke traffic passes through the Hub.Spoke to spoke tunnel cannot be created in DMVPN Phase 1.In the topology above, for the 192.168.2.0/24 network behind Spoke 2, next hop is the tunnel IP of the HUB in the routing table of Spoke 1, not the tunnel IP of the Spoke 2.Thus, the data plane traffic always passes through Spoke 1 – Hub – Spoke 2 with this topology in DMVPN Phase 1.You may want to bring all the traffic to your centralised place where all your security devices are located.You can filter unwanted traffic between the spokes first.After you create a DMVPN network, spoke to spoke communication, or a centralised shared services devices will be reachable through the Hub and traffic can be filtered before reaching the destinations.Spokes can use their local router for Internet traffic. It provides excellent scalability for the routing compared to Phase 2.If you are using DMVPN over IPSEC, since the HUB router needs to encrypt and decrypt packets twice, Phase 1 with IPSEC reduces the overall scalability.DMVPN operation is very similar to the Ethernet ARP process. In exam syllabus it says, Describe only.Anybody have latest questions of 300-101, I failed the test yesterday(7-Jul-17) and my ccnp expiry within 10 days,Failed today with 760pts….although I cleared all my labs , loads of new questions ,don’t trust any dumps…study hard chaps….and loads of simlet ( IPV6 , ACL, NAT, NAT-PT ETC ETC )I was using my old 642-902 books :(, please get the new cert guide for CCNP route 300-101)Hello everyone, for latest valid dump with continuous update, please contact me at steffyshirls @ gmail .comi failed today. Explanation. I just wanted to know if DMVPN, mGRE, IPSec is part of the exam? DMVPN Hub & Spoke, Spoke-to-Spoke concepts are also covered using our unique network diagrams. Note: If you are not sure about DMVPN, please read our From the output we learn that the logical address 10.2.1.2 is mapped to the NBMA address 10.12.1.2. dmvpn interview questions, dmvpn phase 3, dmvpn phases, dmvpn tutorial, dmvpn troubleshooting, dmvpn configuration example, dmvpn basics, getvpn vs dmvpn, dmvpn … this site needs to be updated.Which two phases of DMVPN allow the spoke site to create dynamic tunnels to one other? Please contact me via durshen81 @ gmail .comScored 9xx, used dumps from IT-Libraries. What is DMVPN?