Usually, physical loops do not cause much trouble for routing protocols. For example, our network works fine even it includes a physical loop. To eliminate any possibility of forming routing loops due to the physical loops of the network, distance-vector routing protocols add only one best rout...
Like distance-vector protocols, link-state protocols also find the best routing path and share information with nearby routers. Unlike distance-vector protocols, they calculate the speed and cost of the resources of each potential path. For example, if a route is longer, it may cost more to ...
For example, how quickly can a routing protocol be expected to act when there is a link failure. Routing protocols classify changes into two kinds: hard changes such as link failures and soft changes such as a peer dying silently. They are classified differently because protocols provide ...
Learn about dynamic routing protocols including the use cases, the advantages, and the limitations of RIPv2, EIGRP, OSPF, IS-IS, and BGP.
EIGRP needs five metrics when redistributing other protocols: bandwidth, delay, reliability, load, and MTU, respectively. Multiple EIGRP processes can run on the same router, with redistribution between them. For example, EIGRP1 and EIGRP2 can run on the same router. However, you do not need...
A routing protocol (RIP, for example) may need to import the routing information discovered by other protocols to enrich its routing knowledge. While importing routing information from another protocol, it possibly only needs to import the routes meeting given conditions and control some attributes ...
It is required that any two hosts on different network segments can communicate with each other when no dynamic routing protocols are configured. In this example, interface1, interface2, and interface3 represent 10GE1/0/1, 10GE1/0/2, and 10GE1/0/3, respectively. Figure 3-70 Network ...
The development of the ad hoc routing protocols over the last 15 years is an example of one of the most systematic explorations of a design space in the history of computer science. Although, clearly, newer protocols have built upon the earlier ones, we cannot identify a single “best” pro...
A routing protocol can import and advertise routes that are discovered by other routing protocols. For example, a router runs the Open Shortest Path First (OSPF) protocol. To use OSPF to advertise direct routes, static routes, or Intermediate System-Intermediate System (IS-IS) routes, the route...
Holddown is a route advertisement policy that some D-V based routing protocols (for example, RIP) use to avoid the spread of wrong routes but speed up the correct spread of ICMP unreachable messages. A certain route is advertised at intervals, no matter whether the currently discovered route ...