Just an additional comment: Cisco routers will use UDP packets for the traceroute. Only the "TTL expired in transit" answer is ICMP. You can see this from an extended traceroute:
Target IP address: 220.127.116.11
Numeric display [n]:
Timeout in seconds :
Probe count :
Minimum Time to Live :
Maximum Time to Live :
Port Number : <-------- UDP port 33434
Loose, Strict, Record, Timestamp, Verbose[none]:
Type escape sequence to abort.
Tracing the route to 18.104.22.168
The first packet will be sent to UDP port 33434 and each subsequent packet will have the UDP port number increased by one (33435, 33436, ...). In case your traceroute starts from a router, do not block those UDP packets and also allow the ICMP TTL expired packets in return, as described in the previous post.
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...