4/7/2024 0 Comments Ip route summary calculatorIf this network appears in the routing table from any source, it is flagged as a possible choiceįor the default route. Ip default-network global configuration command. If dynamic default information is not being passed to the system, candidates for the default route are specified with the Metric information to set the default route or the gateway of last resort. Cisco routers use administrative distance and Networks, there might be several candidate networks for the system default. In Interior Gateway Routing Protocol (IGRP) Scans its routing table to choose the optimal default network as its default route. When default information is passed through a dynamic routing protocol, no further configuration is required. Its own default is to specify a static route to the network 0.0.0.0 through the appropriate device. In RIP, it advertises the pseudonetwork 0.0.0.0.Ī router that is generating the default for a network also might need a default of its own. If a router has a directly connected interface to the specified default network, the dynamic routing protocols running on Most dynamic interior routing protocols include a mechanism for causing a smart router to generate dynamicĭefault information that is then forwarded to other routers. Table information for the entire internetwork.) These default routes can be dynamically learned or can be configured in the Some routers as smart routers and give the remaining routers default routes to the smart router. To provide complete routing capability, you can use When the software can no longer find a valid next hop for the address specifiedĪs the forwarding router's address in a static route, the static route is alsoĪ router might not be able to learn the routes to all other networks. Routing protocols advertise the route unless a redistribute static command is specified for these protocols.Īll static routes through that interface are removed from the IP routing table. However, if you define a static route to an interface that is not one of the networks defined in a network command, no dynamic Routes that point to an interface are considered in the routing table to be connected and hence lose their static nature. These static routes are advertised because static Redistribute router configuration commands were specified for those routing protocols. Static routes that point to an interface are advertised through RIP and other dynamic routing protocols, whether or not static If you want a static route to be overridden by information from a dynamic routing protocol, set theĪdministrative distance of the static route higher than that of the dynamic protocol. Each dynamic routing protocol has a default administrative distance, as listed However, you can override static routes with dynamic routing informationīy assigning administrative distance values. The switch retains static routes until you remove them. Static routes can be important if the router cannot build a route to a particular destination and are useful for specifyingĪ gateway of last resort to which all unroutable packets are sent. Static unicast routes are user-defined routes that cause packets moving between a source and a destination to take a specified It supports RIP for both IPv4 and IPv6 versions. The switch supports static routes and default routes. Switch B receives the packet and forwards it to Host C. The router checks the routing table,įinds the correct outgoing interface, and forwards the packet on the VLAN 20 Host C in VLAN 20, Switch A forwards the packet to the router, which receives Switch A forwards the packet directly to Host B, without sending it to To communicate with Host B in VLAN 10, it sends a packet addressed to that The router has an interface in each VLAN. Switch A is in VLAN 10, and Switch B is in VLAN 20. You configure one or more routers to route traffic to theĪ basic routing topology. Route traffic between the VLAN, referred to as inter-VLAN routing. However, network devices in different VLANs cannot communicate with one another without a Layer 3 device (router) to Configuring VLANs helps control the size of the broadcast domain and keeps local traffic In some network environments, VLANs are associated with individual networks or subnetworks. In addition to IPv4 traffic, you can also enable IPv6 unicast routing and configure interfaces to forward IPv6 traffic This module describes how to configure IPv4 unicast routing on a device. Feature Information for IP Unicast Routing.Configuration Examples for IP Unicast Routing. Monitoring and Maintaining the IP Network.
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