I was wondering if anyone knew if I could use a subnet mask of 255.255.255.128 with a network number of 10.107.128.xxx I believe I cannot use this mask with a Class C address but since this is a class A address I though I might be able to. I want to have two subnets each with 126 addresses. These address will be split between two office each with a Cisco 3620 router.
The topic of this forum is IP + Optical however there are a number of professionals online who may be able to assist you. We are always considering additional forums for such topics and I will make a note of your post.
There is a time to and not to use the first and last subnet. In your case, you have no choice since there are only two subnets. This applies to class A, B, & C. In short, a /25 (255.255.255.128) subnet can be used on either class. In your case, 10.107.128.0/25 is your first usable subnet while 10.107.128.128/25 is your last.
Hi Scott, off course you can Use the 25 bits mask, I supouse you are using the a subnet of the 10.0.0.0 net with 24 bits, it is true? and if you use EIGRP or OSPF or RIP2, you can use this mask, but you have to take care if you are using non cisco Routers.
But I suggest you to make a lab, and test all you need.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...