ccna explorationg 4.0 - chapter 2 static routing

1 Chapter 2-Static Routing CCNA Exploration 4.0 Học viện mạng Bach Khoa - Website: www.bkacad.com 2 Objectives • Define the general role a router plays in networks. • Describe the directly connected networks, different router interfaces • Examine directly connected networks in the routing table and use the CDP protocol • Describe static routes with exit interfaces • Describe summary and default route • Examine how packets get forwarded when using static routes • Identify how to manage and troubleshoot static routes Học viện mạng Bach Khoa - Website: www.bkacad.com 3 Role of the Router • The router is a special-purpose computer that plays a key role in the operation of any data network. Routers are primarily responsible for interconnecting networks by: – Determining the best path to send packets. – Forwarding packets toward their destination. Học viện mạng Bach Khoa - Website: www.bkacad.com 4 Introducing the topology • Topology Lab – Three 1800 series routers connected via WAN links. – Each router connected to a LAN represented by a switch and a PC. Học viện mạng Bach Khoa - Website: www.bkacad.com 5 Cable for LAN/WAN interfaces Học viện mạng Bach Khoa - Website: www.bkacad.com 6 Examining Router Interfaces • Examining Router Interfaces – show ip route command – used to view routing table – show interfaces command – used to show status of an interface – show ip Interface brief command – used to show a portion of the interface information – show running-config command – used to show configuration file in RAM Học viện mạng Bach Khoa - Website: www.bkacad.com 7 Configuring an Ethernet Interface • Configuring an Ethernet interface – By default all serial and Ethernet interfaces are admintrative down. – To enable an interface use the no shutdown command. Học viện mạng Bach Khoa - Website: www.bkacad.com 8 Configuring an Ethernet Interface • Verifying Ethernet interface – Show interfaces for fastEthernet 0/0 – command used to show status of fast Ethernet port. – Show ip interface brief. – Show running-config. • Ethernet interfaces participate in ARP Học viện mạng Bach Khoa - Website: www.bkacad.com 9 Logging Synchronous Command • In order to keep the unsolicited output separate from your input, enter line configuration mode for the consoled port and add the logging synchronous command. Học viện mạng Bach Khoa - Website: www.bkacad.com 10 Configuring a Serial Interfaces • Configuring a Serial interface – Enter interface configuration mode – Enter in the ip address and subnet mask – Enter in the clock rate(DCE) and no shut down command • Example: – R1(config)#interface serial 0/0 – R1(config-if)#ip address 172.16.2.1 255.255.255.0 – R1(config-if)#clock rate 64000 – R1(config-if)#no shutdown [...]... Bach Khoa - Website: www.bkacad.com 24 CDP Commands Học viện mạng Bach Khoa - Website: www.bkacad.com 25 STATIC ROUTING Học viện mạng Bach Khoa - Website: www.bkacad.com 26 Purpose and Command Syntax of ip route • • Static routes are commonly used when routing from a network to a stub network A stub network is a network accessed by a single route Học viện mạng Bach Khoa - Website: www.bkacad.com 27 ip... Configuring Static Routes • Installing a Static Route in the Routing Table Học viện mạng Bach Khoa - Website: www.bkacad.com 29 Configuring Static Routes Configuring Routes to Two More Remote Networks Học viện mạng Bach Khoa - Website: www.bkacad.com 30 Routing Table Principles and Static Routes Học viện mạng Bach Khoa - Website: www.bkacad.com 31 Routing Table Principles and Static Routes • Applying the Principles... mạng Bach Khoa - Website: www.bkacad.com 20 Using CDP for Network Discovery To disable CDP on a specific interface after it has been enabled, use the no CDP enable command in interface configuration mode Học viện mạng Bach Khoa - Website: www.bkacad.com 21 CDP Commands Học viện mạng Bach Khoa - Website: www.bkacad.com 22 CDP Commands Học viện mạng Bach Khoa - Website: www.bkacad.com 23 CDP Commands...Verifying Changes to the Routing Table • The routing table consists of a list of "known" network addresses these addresses that are directly connected, configured statically, and learned dynamically Học viện mạng Bach Khoa - Website: www.bkacad.com 11 Verifying Changes to the Routing Table • Observing Routes as They are Added to the Routing Table – debug ip routing command will let us see any... Principles Học viện mạng Bach Khoa - Website: www.bkacad.com 32 Resolving to an Exit Interface Học viện mạng Bach Khoa - Website: www.bkacad.com 33 Resolving to an Exit Interface • Exit Interface is Down Học viện mạng Bach Khoa - Website: www.bkacad.com 34 Configuring a Static Route with an Exit Interface • Static routes can be configured with an exit interface, which allows the routing table to resolve the... to use (exit-interface) (Optional) An administrative distance (Optional) Tag value that can be used as a "match" value for controlling redistribution via route maps (CCNP Advanced Routing) • Permanent (Optional) Specifies that the route will not be removed, even if the interface shuts down (CCNP Advanced Routing) Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 28 Configuring Static Routes... Bach Khoa - Website: www.bkacad.com 12 Devices on Directly Connected Networks • When a router only has its interfaces configured, and the routing table contains the directly connected networks but no other routes, only devices on those directly connected networks are reachable Học viện mạng Bach Khoa - Website: www.bkacad.com 13 Devices on Directly Connected Networks Học viện mạng Bach Khoa - Website:... advertisement from a sending router before discarding it Học viện mạng Bach Khoa - Website: www.bkacad.com 19 Using CDP for Network Discovery Capability (Capability Codes) Capability (type of routing device) of the listed neighboring device The capability types that can be discovered are: R—Router T—Transparent bridge B—Source -routing bridge S—Switch H—Host I— device is using IGMP r—Repeater Platform The... make the connections, and the model numbers of the devices • Concept of neighbors – 2 types of neighbors  Layer 3 neighbors  Layer 2 neighbors Học viện mạng Bach Khoa - Website: www.bkacad.com 15 Cisco Discovery Protocol (CDP) CDP Operation • CDP runs at the Data Link layer connecting the physical media to the upper-layer protocols (ULPs) • Cisco network devices, such as routers that support different... (Optional) Tag value that can be used as a "match" value for controlling redistribution via route maps (CCNP Advanced Routing) • Permanent (Optional) Specifies that the route will not be removed, even if the interface shuts down (CCNP Advanced Routing) Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 36 . R1(config)#interface serial 0/ 0 – R1(config-if)#ip address 1 72. 16 .2. 1 25 5 .25 5 .25 5 .0 – R1(config-if)#clock rate 6 40 00 – R1(config-if)#no shutdown Học viện mạng Bach Khoa - Website: www.bkacad.com. 1 Chapter 2- Static Routing CCNA Exploration 4. 0 Học viện mạng Bach Khoa - Website: www.bkacad.com 2 Objectives • Define the general role a router. dynamically. Học viện mạng Bach Khoa - Website: www.bkacad.com 12 Verifying Changes to the Routing Table • Observing Routes as They are Added to the Routing Table – debug ip routing command will let us