BROCADE IP PRIMER

Console49F Link 50F1Power1F 2F 3F 4F325476981110131215141716191821202322252427262928313033323534373639384140434245444746 48Console49F Link 50F1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47Power1F 2F 3F 4F2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 4849F Link 50FPowerConsole1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 471F 2F 3F 4F2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 4849F Link 50FPower11F 2F 3F 4F32Console5476981110131215141716191821202322252427262928313033323534373639384140434245444746 4849F Link 50FPowerConsole1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 471F 2F 3F 4F2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 4849F Link 50FPower11F 2F 3F 4F32Console5476981110131215141716191821202322252427262928313033323534373639384140434245444746 48Dynamic Routing ProtocolsHow do you configure a default gateway on a router?BR-Switch#conf tBR-Switch(config)#ip route 0.0.0.0 0.0.0.0 192.168.0.1Hey, that looks like a static route! It is. Except the destination network and subnetmask are all zeros. In the router world, that means a default gateway. Doesa router have to have a default gateway? No. Switch A, B, and C didn't needone. Not all routers will need a default gateway. It all depends on yourinfrastructure.Well, that was a lot of work, but I'm sure glad that's over. Can you imagine configuringstatic routes like that on...10 routers? How about 50? How aboutseveral hundred thousand? Good thing the Internet doesn't use static routes!We'll get into that later. What's the alternative?Dynamic Routing ProtocolsThe whole point of a dynamic routing protocol is to provide a way for routers toshare what they know. With static routes, we had to manually configure eachof the routes we wanted in each router's routing table. With dynamic routingprotocols, we let the routers do the talking.Let's go back to our earlier example. Let's say we hadn't configured the staticroutes yet.Switch Ave 10172.16.0.1/24e1192.168.1.1/30e1192.168.1.2/30Switch Bve 20172.17.0.1/24e2192.168.2.2/30e1192.168.2.1/30Switch Cve 30172.18.0.1/24Host A172.16.0.10/24Host B172.17.0.10/24Host C172.18.0.10/24What if, instead of configuring static routes, we simply configured a dynamicrouting protocol on each of the switches. What would happen? Well, to start,we might see this:Switch Ae1192.168.1.1/30Switch B“Hey, I know how to get to 172.18.0.0/24and 192.168.2.0/30”e2192.168.2.2/30Switch Cve 10172.16.0.1/24e1192.168.1.2/30ve 20172.17.0.1/24e1192.168.2.1/30ve 30172.18.0.1/24Host A172.16.0.10/24Host B172.17.0.10/24Host C172.18.0.10/24Brocade IP Primer 227