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Flashcards

GRE / DMVPN

js94lude CCNP Route V2.0 English 11 cards

Cards in this deck (11)

  1. 1Generic Routing EncapsulationGRE
  2. 2GRETunneling protocol developed by Cisco Systems that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links over an Internet Protocol network.
  3. 3GRE OperationEncapsulates inside IP within an outside IP
    Provides appearance that you have a directly connected peer through a multi-hop network.
  4. 4Why not IPSec for VPNIPSEC only allows Unicast packets through the tunnel. If this is the only protocol allowed you wont be able to use a routing protocol like EIGRP or OSPF due to these use multicast to establish neighborships.
  5. 5Internet Protocol SecurityIPSec
  6. 6IPSecProtocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session.
  7. 7GRE Configurationinterface Tunnel1 - Define Interface
    ip address 172.16.1.1 255.255.255.0 - Tunnel IP
    tunnel source 1.1.1.1 - IP add of parent int
    tunnel destination 2.2.2.2 - IP add of dest int
  8. 8Dynamic Mulitpoint Virtual Private NetworkDMVPN
  9. 9DMVPNDynamically creates GRE/IPsec tunnels by using NHRP to maintain a database of connected systems within the DMVPN topology.
    The topology contains a Hub and Spoke setup where the HUB maintains the NHRP database. When a packet is sent from one spoke to another, the HUB passes the needed information from the NHRP database back to the source which will allow both spokes to create a GRE tunnel directly with each other effectively removing the HUB from the communication stream.
  10. 10Next Hop Resolution ProtocolNHRP
  11. 11NHRPARP-like protocol that dynamically maps NBMA networks. Routers attached to an NBMA network can dynamically learn the NBMA (physical) address of the other systems that are part of that network, allowing these systems to directly communicate.

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Description
CCNP Route V2.0 (Interconnecting Offices) Flashcards on GRE / DMVPN, created by js94lude on 14/09/2015.
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js94lude
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