Chapter 11 Intro to Routing Switching Upon completion

Chapter 11 Intro to Routing & Switching

� Upon completion of this chapter, you should be able to: �Configure a router with a basic configuration �Configure a serial WAN link with a clock rate �Configure a default route �Use CDP to identify neighboring Cisco devices

11. 1

� Open up Packet Tracer & add: �A PC � 2960 switch � 1841 router w/ WIC-2 T added in slot 0 �Ethernet & console cables

� Configure: �Hostname- GCC �Enable password- cisco �Secret password- class �Con 0 & vty passwordgcit �Encrypt all passwords �Fa 0/0 �Subnet 185. 17. 105. 0 need 5 networks; use the 1 st usable for this network 1 st in range for fa 0/0 3 rd in range for PC

� Add: �Another 1841 w/ WIC-2 T in slot 0 �Connect with serial DCE cable from left to right S 0/0/0 to s 0/0/0 �Another switch �Another PC �Connect with Ethernet and console cables

� Configure: �Hostname- GCEC �Enable password- cisco �Secret password- class �Con 0 & vty passwordgcit �Encrypt all passwords �Fa 0/0 � 2 nd usable range 1 st in range for fa 0/0 3 rd in range for PC

� Real life serial (WAN) connection to ISP �Your router is a DTE �CSU/DSU is the DCE Connects to ISP network Provides a clocking rate for signal � External CSU/DSU or module for router

� DB-60 to V. 35 Smart Serial

� On the serial port connected to CSU/DSU �DCE

� What is the purpose of a CSU/DSU? �Connect router to ISP & provide clock rate � What kind of cable would you connect from your router to a CSU/DSU? �Smart serial to DB-60 � In our class/PT, on which type of port would you configure a clock rate on? �Serial � What rate? is the command to configure the clock �Router(config-if)# � Is your �DTE clock rate 56000 router normally a DCE or DTE?

11. 2

� Router forwards packet to a destination network �Looks at routing table to see which port to go out �You can set a default route to go out if destination network is not in routing table

Default route using outgoing INT Default route using outgoing next hop IP

� What do you configure in a router to tell it “if you don’t have the destination network in the routing table, go this way. ” �Default route � What are the 2 possible commands to configure a default route? �B(config)# ip route 0. 0 next hop IP �B(config)# ip route 0. 0 outgoing int � What �Any does the quad zero mean? network (IP/SM) � Which command encrypts all passwords? �Service password-encryption

11. 3

� Shares info between directly connected Cisco devices (neighbors) �Runs on boot �Sends periodic CDP advertisements, every 60 sec. �Operate at Layer 2 � Information �Device gathered by CDP includes: host name �Layer 3 addresses �What the directly connected port is, “serial 0/0/0” �Capabilities list – Router, Switch �Platform, for example Cisco 1841

� Why � PT disable it? 5. 4. 4. 5

� Show cdp interface �Verify frequency sent P 2 R 3#show cdp interface Fast. Ethernet 0/0 is up, line protocol is up encapsulation ARPA Sending CDP packets every 60 seconds Holdtime is 180 seconds

� What layer does CDP operate at? �Layer � How � 60 2 often do CDP advertisements get sent? seconds � What does CDP do? �Discover neighboring Cisco devices � What command displays the table of neighboring devices? �B# show cdp neigbors

� What command turns CDP off for the router? �B(config)# � Why no cdp run would you turn CDP off? �Neighbors aren’t Cisco devices � Your Cisco router connects to a 3 Com switch on Fa 0/0 and a Cisco router on S 0/0/0. What command will make the router not exchange CDP advertisements to the switch? �B(config-if)# no cdp enable

� Identify means. what each category in the table

� You configured a router with basic settings. � You know how a router connects to an ISP with a CSU/DSU. � You can identify DCE and DTE devices. � You know which cable connects from the router to the CSU/DSU. � You can configure a clock rate on a serial interface. � You can configure a default route and know why you should configure one.

� You know the purpose of CDP and how/when it is used. � You can read a CDP table and can backwards design the network based on the output. � You know which command is used to display the CDP table and the detailed output. � You can turn CDP off on the router and on the interface.

� Complete � Take the study guide handout the quiz on netacad. com � Jeopardy review

Chapter 11 Intro to Routing & Switching