Plus, configuring dual stacking on a Cisco router is amazingly easy—all you have to do is enable IPv6 forwarding and apply an address to the interfaces already configured with IPv4. It will look something like this: Router(config)#ipv6 unicast-routing Router(config)#interface fastethernet 0/...
10.10.2.2 and 10.10.3.3 are router IDs of R2 and R3 respectively, as an OSPF router chooses the highest IP address on a Loopback interface as its OSPF router ID by default (which influences also the election ofDR and BDR devices). ...
Each router interface needs a valid IP address to run. This command matches the given IP address with the IP address of all interfaces. If an interface's IP address matches the given IP address, it enables the OSPF process on that interface and adds that interface to the specified OSPF are...
OSPF area number - Enter the show ip ospf interface interface-name command in order to check. OSPF area type, such as stub or NSSA - Enter the show ip ospf command in order to check. How do I enable OSPF? To enable OSPF on a Cisco router and advertise interfaces, the following tasks...
MORE READING:Cisco Router HSRP Configuration - Two Examples We will enable EIGRP on Fa0/0 and S0/0 on R1 and you should carefully note the inverse mask used with thenetworkcommand: R1(config-router)#network 172.16.13.0 0.0.0.255 R1(config-router)#network 192.168.12.0 0.0.0.3 ...
In this lesson, I’ll show you how to configure the RIP on a Cisco router. This is the topology that I will use: Above, we see three routers called R1, R2, and R3. There are a couple of networks, so we’ll have something to advertise in RIP. First, let’s configure all the ...
Enable ospf is pretty simple. Just run the command in all router confor t router ospf 1 network X.x.x.x X.x.x.x Then, to influence the traffic flow, use link cost. Router#conf t Router(config)#int gi0/0/0 Router(config-if)#ip ospf cost <1-65535> Or bandwidth Router#conf...
Flackbox Cisco CCNA course student - click here to enroll The Network Command Works Differently for BGP than It Does for IGPs. The “network” command works differently for BGP than it does for IGPs (RIP OSPF, EIGRP and ISIS). In IGPs, the “network” command means: Enable the routing ...
On an OSPF network, configured OSPF router IDs conflict sometimes. Once a router ID conflict occurs, OSPF LSAs are frequently aged and generated, causing network unstable. This is because a router ID uniquely identifies an OSPF device. When a router ID conflict occurs, the following situations ...
If the ospf mtu-enable command is run on the interfaces on both ends, the MTUs of the two interfaces must be consistent. Otherwise, the OSPF neighbor relationship cannot be established. Run the display this interface command in the interface view to check the interface MTU. If the ...