We are going old school today .... The Netacad.com site is down.
Todays topics:
crossover cables - build one
Router boot up process
reading the show version output
look at wikipedia Cisco IOS for further info on understanding versions
static vs dynamic routing
Routing Tables
reading the show ip route command
encapsulation HDLC, Frame Relay, PPP
hdlc, ppp, frame relay
Routing Protocols:
primary object is to determine the best patch to include in the routing table
May use one of the following metrics: Hop Count (RIP) or Bandwidth (OSPF)
Path Determination:
Directly connected network (destination address in on same network as interface)
Remote network (destination is on a remote network - packet forwarded to another router)
No route determined (drops packet, send ICMP unreachable message to source)
The switching function of the router accepts the packet on one interface and forwards it out another.
decapsulates layer 3 packet removing Layer 2 frame header and trailer
examines IP address to find best route
encapsulates Layer 3 packet in new Layer 2 frame and sends it out
Layer 3 packet does not change except for the TTL. Layer 2 updates source and destination data-link addresses.
clip on routers and routing
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