Change Details

Quagga integrates the OSPF protocol, which allows routes to be dynamically advertised so that other machines know which path to use to reach internal networks. We have two routers: - router-002 (BACKUP) - router-003 (ACTIVE) When a failover occurs: - CARP moves the VIP to the new ACTIVE - OVH script updates the MAC address T2276 However, remote machines (like Windriver, Ysul, CloudHugger) still send traffic through the old GRE tunnel, because they don't know that the active router has changed. `The issue is not about reaching the VIP itself, but about selecting the correct path to reach the internal network (172.27.27.0/27).` To solve this, Quagga provides OSPF, which is used to dynamically advertise the network through both routers. This ensures that traffic is always routed through the GRE tunnel connected to the ACTIVE router. ----------------------- References : https://fr.wikipedia.org/wiki/Quagga_(logiciel) https://enotepaper.wordpress.com/2014/01/08/installing-quagaa-on-freebsd/

Quagga integrates the OSPF protocol, which allows routes to be dynamically advertised so that other machines know which path to use to reach internal networks. -------------- **Context : ** We have two routers - router-002 (BACKUP) - router-003 (ACTIVE) When a failover occurs: - CARP moves the VIP to the new ACTIVE router - The OVH script updates the MAC address T2276 Remote machines (such as Windriver, Ysul, and CloudHugger) use a GRE tunnel to reach the network 172.27.27.0/27. `When the active router changes, the previous tunnel becomes unavailable and is removed, which also deletes the associated route.` As a result, if nothing is done, these machines no longer have a valid route to reach the internal network. To solve this, the active router must advertise the network using OSPF, so that remote machines automatically learn the correct route and can continue to reach the network. ----------------------- References : https://fr.wikipedia.org/wiki/Quagga_(logiciel) https://enotepaper.wordpress.com/2014/01/08/installing-quagaa-on-freebsd/

Quagga integrates the OSPF protocol, which allows routes to be dynamically advertised so that other machines know which path to use to reach internal networks. -------------- **Context : ** We have two routers: - router-002 (BACKUP) - router-003 (ACTIVE) When a failover occurs: - CARP moves the VIP to the new ACTIVE - OVH script updates the MAC address T2276 However, remote machines (like Windriver, Ysul, CloudHugger) still send traffic through the old GRE tunnel, because they don't know that the active router has changed. `The issue is not about reaching the VIP itself, but about selecting the correct path to reach the internal network (172.27.27.0/27).`- CARP moves the VIP to the new ACTIVE router - The OVH script updates the MAC address T2276 To solve thiRemote machines (such as Windriver, Ysul, and CloudHugger) use a GRE tunnel to reach the network 172.27.27.0/27. `When the active router changes, Quagga provides OSPFthe previous tunnel becomes unavailable and is removed, which is used to dynamically advertisealso deletes the network through bothassociated routers..` This ensures that traffic is always routed through the GRE tunnel connected toAs a result, if nothing is done, these machines no longer have a valid route to reach the ACTIVE routerinternal network. To solve this, the active router must advertise the network using OSPF, so that remote machines automatically learn the correct route and can continue to reach the network. ----------------------- References : https://fr.wikipedia.org/wiki/Quagga_(logiciel) https://enotepaper.wordpress.com/2014/01/08/installing-quagaa-on-freebsd/