1 / 33

Router Configuration

Router Configuration. CISCO 2500 series router. A router is a special type of computer. It has the same basic components as a standard desktop PC. It has a CPU, memory, a system bus, and various input/output interfaces. . Router Components: RAM.

louvain
Télécharger la présentation

Router Configuration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Router Configuration

  2. CISCO 2500 series router

  3. A router is a special type of computer. It has the same basic components as a standard desktop PC. It has a CPU, memory, a system bus, and various input/output interfaces.

  4. Router Components: RAM RAM has the following characteristics and functions: • Stores routing tables • Holds ARP cache • Holds fast-switching cache • Performs packet buffering as shared RAM • Maintains packet-hold queues • Provides temporary memory for the configuration file of a router while the router is powered on • Loses content when a router is powered down or restarted

  5. Router Components: NVRAM NVRAM has the following characteristics and functions: • Provides storage for the startup configuration file • Retains content when a router is powered down or restarted

  6. Router Components: Flash memory Flash memory has the following characteristics and functions: • Holds the IOS image • Allows software to be updated without removing and replacing chips on the processor • Retains content when a router is powered down or restarted • Can store multiple versions of IOS software • Is a type of electrically erasable programmable read-only memory (EEPROM)

  7. Router Components: ROM ROM has the following characteristics and functions: • Maintains instructions for power-on self test (POST) diagnostics • Stores bootstrap program and basic operating system software • Requires replacing pluggable chips on the motherboard for software upgrades

  8. Router Components: Interfaces Interfaces have the following characteristics and functions: • Connect routers to a network for packet entry and exit • Can be on the motherboard or on a separate module

  9. Console port connections

  10. Router Configuration

  11. Cisco IOS Software • Basic routing and switching functions • Reliable and secure access to networked resources • Network scalability • Router> show version • …<output omitted>… • cisco 2620 (MPC860) processor (revision 0x102) with 59392K/6144K bytes of memory • Router>show flash

  12. Router# configure terminal Router(config)# • Type exit or Ctrl-Z to return Router(config)#hostname Tokyo Tokyo(config)# Router(config)#line console 0 Router(config-line)#login Router(config-line)#password <password >

  13. show commands • show ? – any time for help with commands type ? • Router# show interfaces serial 0/1 • show clock - Shows the time set in the router • show hosts - Displays a cached list of host names and addresses • show users - Displays all users who are connected to the router • show history - Displays a history of commands • show flash - information about flash memory and IOS files • show version - currently loaded software version and hardware • show protocols - status of configured Layer 3 protocols • show startup-config - saved configuration located in NVRAM • show running-config

  14. Configuring interfaces • Router(config)#interface serial 0/0 • Router(config-if)# ip address <ip address > <netmask > • Router(config)#interface serial 0/0 • Router(config-if)#clock rate 56000 • Router(config-if)#no shutdown • Router#copy running-config startup-config • Router#erase startup-config

  15. Routing and Routing Protocols • dynamic routing, • static routing • ip route command to manually configure a static route. • administrative distance is an optional parameter that indicates the reliability of a route. • waycross(config)# ip route 172.16.3.0 255.255.255.0 172.16.4.1130 • Route can be configure by outgoing interface or next hop ip address. • default route is given by ip route 0.0.0.0 0.0.0.0 [next-hop-address | outgoing interface ]

  16. Routing and Routing Protocols

  17. Dynamic Routing Two types of dynamic routing: • Distance vector • Link-state routing protocols: • Routing Information Protocol (RIP) • Interior Gateway Routing Protocol (IGRP) • Enhanced Interior Gateway Routing Protocol (EIGRP) • Open Shortest Path First (OSPF) routed protocols : • Internet Protocol (IP) • Internetwork Packet Exchange (IPX) • Autonomous systems - 16-bit identification number • Routing protocols, e.g. Cisco IGRP, require assignment of a unique AS

  18. Dynamic Routing

  19. Configuring Dynamic Routing • BHM(config) #router rip – Selects RIP as the routing protocol • BHM(config-router) #network 10.0.0.0 – Specifies a directly connected network • BHM(config-router) # network 192.168.13.0 – Specifies a directly connected network • RIP was originally specified in RFC 1058 : • It is a distance vector routing protocol. • Hop count is used as the metric for path selection. • If the hop count is greater than 15, the packet is discarded. • Routing updates are broadcast every 30 seconds, by default. • Load balancing among multiple equidistance path

  20. Troubleshooting • ABC#show ip protocols • ABC#show ip route • ABC#show interfaceinterface • ABC#show ip interfaceinterface • ABC#show running-config • show ip rip database • show ip protocols {summary} • debug ip rip {events} • ip interface brief

  21. IGRP • IGRP uses the following metrics: • Bandwidth – The lowest bandwidth value in the path • Delay – The cumulative interface delay along the path • Reliability – The reliability on the link toward the destination as determined by the exchange of keepalives • Load – The load

  22. RouterA(config) #router igrpas-number

  23. More on Routing… • OSPF and EIGRP • EGP and IGP • Switching • VLAN • Access Control List (ACL)

  24. OSPF • OSPF is a nonproprietary link-state routing protocol. • It is a link-state routing protocol. • It is an open standard routing protocol described in RFC 2328. • The SPF algorithm is used to calculate the lowest cost to a destination. • Routing updates are flooded as topology changes occur. # router ospfprocess-id # network net-address wildcard-maskareaarea-id

  25. EIGRP • EIGRP is a Cisco proprietary enhanced distance vector routing protocol. • It is an enhanced distance vector routing protocol. • It uses unequal cost load balancing. • It uses a combination of distance vector and link-state features (hybrid). • It uses Diffused Update Algorithm (DUAL) to calculate the shortest path. • Routing updates are multicast using 224.0.0.10 triggered by topology changes. Max hop 255 RA(config-router)#router eigrpautonomous-system-number RA(config-router)# network network-number

  26. BGP • Border Gateway Protocol (BGP) is an exterior routing protocol. • It is a distance vector exterior routing protocol. • It is used between ISPs or ISPs and clients. • It is used to route Internet traffic between autonomous systems.

More Related