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34. Dynamic Routing
After the failure all routers still know how to reach the entire network, and the clients on 1.1.2.0/24 can
still send on the network using the same gateway address. The clients will see only a MAC address
change of the gateway and experience a few seconds of network outage When the link returns, VRRP
will switch back to the master, and the routes will return to their normal state.
Note that if the Router 1 WAN link fails, Router will see routes to Router3 via the Router 1 – Router
2 WAN and Ethernet links. If the faster Router 1 – Router 2 Ethernet path fails, Router 1 will fall back
to the Router 1 – Router 2 WAN link.
Note that it would not be useful to leave the Ethernet 1.1.2.0/24 subnets out of the area and turn on
redistribute connected as OSPF would not use the subnets for routing.
34.1.6. BGP Fundamentals
The Border Gateway Protocol (BGP, RFC 4271) is a robust and scalable routing protocol. BGP is
designed to manage a routing table of up to 90000 routes. Therefore, it is used in large networks or
among groups of networks which have common administrative and routing policies. If BGP is used
to exchange routing information between different networks, it is called Exterior BGP (EBGP). Interior
BGP (IBGP) is used to exchange routing information between routers within the same network.
34.2. Dynamic Routing Configuration
Figure 34.2. Dynamic Routing Menu
The Dynamic Routing menu is accessible from the main menu under routing. The path to this menu
is routing/dynamic.
The BGP, RIP and OSPF menus provide access to features that enable configuration of the
corresponding routing protocols.
34.3. RIP
Figure 34.3. RIP Menu
The RIP menu is accessible from the main menu under routing. The path to this menu is routing/
dynamic/rip.
ROX™ v2.2 User Guide
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RuggedBackbone™ RX1500
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