a directed broadcast is a message to either the network number of the broadcast number of a network. This can be exploited to flood connections. By spoofing an address and sending a directed broadcast, all host belonging to a network, will reply. By disabling directed broadcast. The broadcast will not be translated to a physical broadcast. this means no hosts wil reply.
ip classless means the router will asume subnet masks according to the IP class of the IP number hense:
Class A 255.0.0.0
Class B 255.255.0.0
Class C 255.255.255.0
ip subnet-zero means the router can use the first subnet in the range.
If you subnet a class c network in four subnets
The ranges will be:
192.168.1.0 - 192.168.1.63 <--First subnet in range
192.168.1.64 - 192.168.1.127
192.168.1.128 - 192.168.1.191
192.168.1.192 - 192.168.1.255
If NO ip subnet-zero is configured, the router cannot use the first subnet.
I don't know about fair-queue.. I'll have to look it up
I looked up the command in the IOS reference, this is what it said:
At times the router might receive packets destined for a subnet of a network that has no network default route. To have the Cisco IOS software forward such packets to the best supernet route possible, use the ip classless global configuration command. To disable this feature, use the no form of this command.
Thanks for the above. On to the next question. Weighted fair queuing is enabled by default on interfaces with less than 2M and on interfaces that support it. To disable this function use no-faire queuing.
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...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.