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Basic Switch and End Device Configuration - Coggle Diagram
Basic Switch and End Device Configuration
ICMP Messages
Destination or Service Unreachable
An ICMP destination unreachable message can be used to notify the source that a service is unreachable
The ICMP message will have a code showing why the packet has not been delivered
Time Exceeded
TTL= Time To Live
When the TTL runs out on ICMPv4 the exceeded message is sent to the source host
ICMPv6 sends a time exceeded message which does not use TTL but instead uses IPv6 Hop Limit to say if the packet has expired.
Host Reachability
ICMP echo message can be used to test the reachability of a host
ICMPv6 Messages
Router Solicitation (RS) message
An RA message is a response to an RS message
Router Advertisement (RA) message
These are sent by IPv6-enabled routers every 200 seconds to provide information to ipv6 enabled hosts
Neighbor Solicitation (NS) message
This is to check the uniqueness of an address
Neighbour Advertisement (NA)
If there is an duplicate address this message will notify the sending device
ICMPv4 & ICMPv6 Messages
ICMP= Internet Control Message protocol
It provides feedback about issues related to the processing of IP packets
The ICMP messages include:
Destination or Service Unreachable
Time exceeded
Host Reachability
Ping and Traceroute Tests
Ping the Loopback
Ping the Default Gateway
Ping- Test Connectivity
This is to make sure that the echo request message is working
Ping a Remote Host
Traceroute- Test the Path