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Copyright © 1997 Cisco Systems, Inc.
6-53CSE: Networking Fundamentals — WAN Basics
© 1999, Cisco Systems, Inc.
www.cisco.com
Routers (Operationally)
Routers (Operationally)
• Maintain/manipulate routing information
–Listen for updates/update neighbors
• Classify packets for manipulation/queuing/permit-deny,
etc.
–Compare packets to classification lists and perform control
• Perform Layer 3 switching
–Create outbound Layer 2 encapsulation
–Layer 3 checksum
–TTL/hop count update
• Management/billing (statistics)
–Interface statistics— Netflow export
–Telnet, SNMP, ping, trace route, HTTP
6-54CSE: Networking Fundamentals — WAN Basics
© 1999, Cisco Systems, Inc.
www.cisco.com
Routers
Flexibility
Cisco 2500
Cisco 3600
AS5200
Cisco 7200
Dial
Cisco 1005
Cisco 1600
Cisco 7500
Cisco 700
Cisco 1000
Cisco 1600
AS5300
Cisco 2600
Cisco 2600
Cisco 4000
Cisco 2509-12
Rev 1.01 (Feb 99)
Cisco 1720
Cisco 800
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