BR S1R1 send an EIGRP SAF message to Hub MC to inform it about the new channel (a) which in turn informs the backup BR about new channels and instructs it to generate a smart probe over the backup channel.BR S1R1 assign channel-Id 35 to primary path (path-id 11) and channel-Id 36 to the backup path (path-id 12). It has a RIB entry learned via OSPF from the BR S1R2 so it is selected as the secondary path. It also does a parent route lookup (NHRP cache>BGP table, EIGRP table, static routes, and RIB) for finding standby path to the destination. BR S1R1 makes the forwarding decision based on the RIB and selects the BGP learned route over the MPLS WAN as a primary path. Since packets are marked with the DSCP EF (class VOICE), data flow triggers proactive Control Plane operations. The packet is routed over the MPLS WAN connection through the Tunnel11.The packet is routed to the BR S1R1 based on routing information received from OSPF.We will use these two networks in the PfRv3 demonstration. On the Hub site, there is an internal router that has four loopback interfaces which represent LANs. The complete DMVPN configuration can be found in the document: “ DMVPN Part III. A routing protocol for overlay network is BGP.
Remote site BR and Hub BRs are connected over MPLS and the Internet using a DMVPN overlay technology. On the Remote site, there is a router which has two roles, site Master Controller (MC) and site Border Router (BR). There is one Master Controller (MC) S1R4 and two Border Routers (BR) S1R1 and S1R2 on the Hub site. Using a DMVPN together with a PfRv3, we can have a transport independent WAN, where forwarding decision is done based on the application requirements (e.q bandwidth, delay, jitter, and packet loss) instead of only relying on information received from routing protocols.įigure 1 shows the example topology. In this post, I am going to enable an intelligent path control with the Performance Routing version 3 (PfRv3). Introduction In my previous posts, DMVPN Part I – IV, I have described and built a dual homed DMVPN overlay network over MPLS and Internet WAN.
0 kommentar(er)
