1. Router Configuration Configuring interfaces

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

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

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

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

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

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

8. Task 2 n define encapsulation type n 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 n can permit or deny specific users, protocols, directions n ACL’s created in Global config mode n 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” n Brings interface into service once configuration complete