CNNA3-Chapter 6 docx

CCNA3-1 Chapter 6 Chapter 6 Chapter 6 Inter-VLAN Routing Inter-VLAN Routing CCNA3-2 Chapter 6 Inter-VLAN Routing Inter-VLAN Routing Introducing Inter-VLAN Routing Introducing Inter-VLAN Routing CCNA3-3 Chapter 6 • What is Inter-VLAN Routing? What is Inter-VLAN Routing? • Each VLAN is a Each VLAN is a unique broadcast domain unique broadcast domain . . • Computers on separate VLANs are, Computers on separate VLANs are, by default by default , not , not able to communicate. able to communicate. • Each VLAN is a Each VLAN is a unique IP subnetwork unique IP subnetwork . . • To allow VLANs to communicate, we need a router to To allow VLANs to communicate, we need a router to communicate among separate broadcast domains and communicate among separate broadcast domains and unique IP subnetworks. unique IP subnetworks. • Inter-VLAN routing Inter-VLAN routing , then, , then, is a process of forwarding traffic is a process of forwarding traffic from one VLAN to another VLAN using a router from one VLAN to another VLAN using a router . . Introducing Inter-VLAN Routing Introducing Inter-VLAN Routing CCNA3-4 Chapter 6 • Methods: Methods: • Traditional Traditional Inter-VLAN Routing. Inter-VLAN Routing. • Router-on-a-stick Router-on-a-stick Inter-VLAN Routing. Inter-VLAN Routing. • Switch Based Switch Based Inter-VLAN Routing. Inter-VLAN Routing. Introducing Inter-VLAN Routing Introducing Inter-VLAN Routing CCNA3-5 Chapter 6 • Traditional Inter-VLAN Routing: Traditional Inter-VLAN Routing: • One router interface per VLAN. One router interface per VLAN. Introducing Inter-VLAN Routing Introducing Inter-VLAN Routing VLAN VLAN Tagged Tagged VLAN VLAN Tagged Tagged Internally Routed to Internally Routed to the proper subnet. the proper subnet. Internally Routed to Internally Routed to the proper subnet. the proper subnet. Tag Tag removed removed Tag Tag removed removed CCNA3-6 Chapter 6 • Router-on-a-stick Inter-VLAN Routing: Router-on-a-stick Inter-VLAN Routing: • One router interface for One router interface for all VLANs all VLANs . . Introducing Inter-VLAN Routing Introducing Inter-VLAN Routing VLAN VLAN Tagged Tagged VLAN VLAN Tagged Tagged Internally Routed to Internally Routed to the proper subnet. the proper subnet. Internally Routed to Internally Routed to the proper subnet. the proper subnet. Tag Tag removed removed Tag Tag removed removed CCNA3-7 Chapter 6 • Layer 3 Switch Inter-VLAN Routing: Layer 3 Switch Inter-VLAN Routing: • Uses Uses Switch Virtual Interfaces (SVI) Switch Virtual Interfaces (SVI) to retag to retag the frame. the frame. Introducing Inter-VLAN Routing Introducing Inter-VLAN Routing VLAN VLAN Tagged Tagged (10) (10) VLAN VLAN Tagged Tagged (10) (10) Tag Tag removed removed Tag Tag removed removed CCNA3-8 Chapter 6 • Traditional Inter-VLAN Routing: Traditional Inter-VLAN Routing: • Traditional routing requires routers to have Traditional routing requires routers to have multiple multiple physical interfaces physical interfaces to facilitate inter-VLAN routing. to facilitate inter-VLAN routing. • Each interface is also configured with an Each interface is also configured with an IP address for IP address for the subnet associated with the particular VLAN the subnet associated with the particular VLAN that it is that it is connected to. connected to. • In this configuration, network devices can use the In this configuration, network devices can use the router router as a gateway as a gateway to access the devices connected to the to access the devices connected to the other VLANs. other VLANs. Interfaces and Subinterfaces Interfaces and Subinterfaces CCNA3-9 Chapter 6 Traditional Inter-VLAN Routing Traditional Inter-VLAN Routing Traditional Inter-VLAN Routing Traditional Inter-VLAN Routing Interfaces and Subinterfaces Interfaces and Subinterfaces Tagged Tagged VLAN 10 VLAN 10 Tagged Tagged VLAN 10 VLAN 10 Tag Tag Removed Removed Tag Tag Removed Removed Router Router Responds Responds Router Router Responds Responds Routing table: Routing table: 172.17.10.0 – F0/0 172.17.10.0 – F0/0 172.17.30.0 – F0/1 172.17.30.0 – F0/1 Routing table: Routing table: 172.17.10.0 – F0/0 172.17.10.0 – F0/0 172.17.30.0 – F0/1 172.17.30.0 – F0/1 Router tags Router tags the frame the frame for VLAN 30 for VLAN 30 And switches it And switches it to Port F0/1. to Port F0/1. Router tags Router tags the frame the frame for VLAN 30 for VLAN 30 And switches it And switches it to Port F0/1. to Port F0/1. CCNA3-10 Chapter 6 Interfaces and Subinterfaces Interfaces and Subinterfaces Traditional Inter-VLAN Routing Traditional Inter-VLAN Routing Traditional Inter-VLAN Routing Traditional Inter-VLAN Routing [...]... communicate PC1 cannot communicate PC1 Incorrect IP address for Incorrect IP address for subnet 172. 16. 10.0/24 subnet 172. 16. 10.0/24 Incorrect IP address forfor Incorrect subnet mask for IP address for subnet mask subnet 172. 16. 10.0/24 subnet 172. 16. 10.0/24 subnet 172. 16. 10.0/24 subnet 172. 16. 10.0/24 CCNA3-33 Chapter 6 ... Routing: CCNA3-23 Chapter 6 Configuring Inter-VLAN Routing • Traditional Inter-VLAN Routing: CCNA3-24 Chapter 6 Configuring Inter-VLAN Routing • Traditional Inter-VLAN Routing: CCNA3-25 Chapter 6 Configuring Inter-VLAN Routing • Router-on-a-stick Inter-VLAN Routing: VLANs VLANs Trunk in Trunk in Trunk Trunk Native VLAN Native VLAN Interfaces Interfaces VLANs VLANs CCNA3- 26 Chapter 6 Configuring Inter-VLAN... Interfaces Enable Interfaces CCNA3-19 Chapter 6 Interfaces and Subinterfaces • Router-on-a-stick Inter-VLAN Routing: • Configuring Subinterfaces: Planning! Planning! CCNA3-20 Chapter 6 Interfaces and Subinterfaces • Router Interface and Subinterface Comparison: CCNA3-21 Chapter 6 Inter-VLAN Routing Configuring Inter-VLAN Routing (Putting It All Together) CCNA3-22 Chapter 6 Configuring Inter-VLAN Routing • Traditional... are not directly connected by trunk links CCNA3-15 Chapter 6 Interfaces and Subinterfaces • Router-on-a-stick Inter-VLAN Routing: • Assign it to a VLAN: • Before assigning an IP Address, the interface must to be configured to operate on a specific VLAN using the proper encapsulation R1(config-subif)#encapsulation dot1q vlan-id CCNA3- 16 Chapter 6 Interfaces and Subinterfaces • Router-on-a-stick Inter-VLAN... VLAN R1(config-subif)#ip address [address] [mask] CCNA3-17 Chapter 6 Interfaces and Subinterfaces • Router-on-a-stick Inter-VLAN Routing: • Enable the interface: • Subinterfaces are not enabled individually • When the physical interface is enabled, all associated subinterfaces are enabled R1(config-if)#no shutdown CCNA3-18 Chapter 6 Interfaces and Subinterfaces • Router-on-a-stick Inter-VLAN Routing:... Configuring Inter-VLAN Routing • Router-on-a-stick Inter-VLAN Routing: VLAN 10 VLAN 10 VLAN 30 VLAN 30 Enable All Enable All Subinterfaces Subinterfaces CCNA3-27 Chapter 6 Inter-VLAN Routing Troubleshooting Inter-VLAN Routing CCNA3-28 Chapter 6 Configuring Inter-VLAN Routing VLAN 30 is working but VLAN 10 VLAN 30 is working but VLAN 10 • Switch Configuration Issues: cannot communicate with the cannot communicate... CCNA3-29 Chapter 6 Configuring Inter-VLAN Routing Each of the configured Each of the configured • Switch Configuration Issues: subinterfaces is unable to subinterfaces is unable to send or receive VLAN traffic send or receive VLAN traffic Interface F0/5 is still in Interface F0/5 is still in the default VLAN the default VLAN switchport mode trunk switchport mode trunk CCNA3-30 Chapter 6 Configuring Inter-VLAN... mistakes in Inter-VLAN routing mistakes in Inter-VLAN routing CCNA3-31 Chapter 6 Configuring Inter-VLAN Routing PC1 cannot communicate with the PC1 cannot communicate with the router interface and the router router interface • Router Configuration Issues: and the router cannot route to VLAN 30 cannot route to VLAN 30 CCNA3-32 Chapter 6 Configuring Inter-VLAN Routing • IP Addressing Issues: cannot communicate... model CCNA3-12 Chapter 6 Interfaces and Subinterfaces Router-on-a-stick Inter-VLAN Routing Router-on-a-stick Inter-VLAN Routing Routing table: Routing table: 172.17.10.0 – F0/0.10 172.17.10.0 – F0/0.10 172.17.30.0 – F0/0.30 172.17.30.0 – F0/0.30 Tagged Tagged VLAN 30 VLAN 30 Tagged Tag Tag Tagged Tag Tag Removed Removed VLAN 10 Removed Removed VLAN 30 10 30 CCNA3-13 Chapter 6 Interfaces and Subinterfaces... hardware limitations of a router • Routers have a limited number of physical interfaces that they can use to connect to different VLANs • It is very expensive to add an Ethernet Interface CCNA3-11 Chapter 6 Interfaces and Subinterfaces • Router-on-a-stick Inter-VLAN Routing: • Subinterfaces: • Overcomes the hardware limitation of a router • Subinterfaces are software-based virtual interfaces that are assigned . CCNA3-1 Chapter 6 Chapter 6 Chapter 6 Inter-VLAN Routing Inter-VLAN Routing CCNA3-2 Chapter 6 Inter-VLAN Routing Inter-VLAN Routing Introducing. subnet. the proper subnet. Tag Tag removed removed Tag Tag removed removed CCNA3 -6 Chapter 6 • Router-on-a-stick Inter-VLAN Routing: Router-on-a-stick Inter-VLAN