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Router Configuration

Router Configuration. Configuring interfaces. Configuration categories. Global configuration mode parameters set apply to all interfaces Interface configuration sets parameters for selected interface. Router Interfaces. types serial; parallel most common router set-up has 2 of each.

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Router Configuration

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  1. Router Configuration Configuring interfaces

  2. Configuration categories • Global configuration mode • parameters set apply to all interfaces • Interface configuration • sets parameters for selected interface

  3. Router Interfaces • types • serial; parallel • most common router set-up has 2 of each

  4. comparisons • designation • S0,S1; E0,E1 • communication • serial to WAN, parallel to LAN • data rates • serial range 10’s kbit/s to 2Mbit/s • Parallel range 10/100Mbit/s common, Gigabit increasingly used

  5. considerations • data rate differential • Gigabit WAN link unlikely • bandwidth v cost • LAN bandwidth not usually an issue • WAN bandwidth costly

  6. Configuration tasks - • Serial port • Task 1) - assign network address • Task 2) - define encapsulation type • Task 3) - define bandwidth • Task 4) - assign ACL’s

  7. Task 1 - • Assign network addresses • each interface has a unique network address • address must match remote • CLI command to assign network address is • Router (config-if)#ip address nnn.nnn.nnn.nnn sss.sss.sss.sss

  8. Task 2 • define encapsulation type • PPP most widely used encapsulation • ppp, replacing slip as standard serial line protocol; can encapsulate chap/pap • slip uses PAP encapsulation, less secure than CHAP • CLI command to define encapsulation type is • Router (config-if)#encapsulation ppp

  9. Task 3 • Define bandwidth sets data transfer rate of WAN link used by link-state routing protocols for path determination • CLI command to define bandwidth is • Router (config-if)#bandwidth NNNNN

  10. Task 4 • Assign ACL’s • can permit or deny specific users, protocols, directions • ACL’s created in Global config mode • access-groups implemented on interface basis • CLI command to assign an access-group is • Router (config-if)#ip access-group nnn (in/out)

  11. Finally..

  12. Remember “no shutdown” • Brings interface into service once configuration complete

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