I know this is probably pretty basic for most of you, but I am a bit new to this and in need of assistance. I have a Cisco 2851 Router with a pair of Cisco 3560 Switches connected to it. It is a small LAN with a network address of 172.17.1.0/24. A customer (big customer) wants me to subnet my network to a /28 network to make it easier for them to configure VPN connection from our network into their system. All IPs are statically asssigned (cannot use DHCP due to an application we use). Is establishing this /28 scheme simply a matter of reassigning IPs and changing the SN Mask to 255.255.255.240? Is it true the that first and last subnets are unusable(172.17.1.0 - 172.17.1.15 & 172.17.1.240 - 172.17.1.255)? Are there any changes I need to make in the Router and/or Switches to facilitate this? By subnetting, will this result in communications between subnets being forced through the router or will communications still be handled at the switch level? Any asssitance is greatly appreciated.
Our customer stated that the Internal IP network address of 172.17.1.0/24 is too wide. I assume he is wanting to setup some sort of access list on his router allowing us to VPN from our network to his system. He asked for the specific static IPs assigned to the users in my network that will be accessing his system.
Sorry for delay in response...troublesome afternoon. I too was perplexed as to why they require I subnet my network if I am providing them static IPs. The customer is a major DOD contractor (big big beast of a company) and I think they're just used to bullying little companies like us into doing what they want whether it makes sense or not.
I will inquire with our customer if the static IPs will suffice to meet their needs, and upon receiving their response, post it here. Thanks a ton for your assistance and recommendations thus far...very much appreciated.
The fact that you are going to be using a /28 does need to be configured on the router and the switch. It is true that the first and last subnets should not be used. I believe this is debatable but it is very god practice not to use them.
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.