Mike Knisely wrote:
>
> First, I'm happy to hear you're going through the Cisco Academy. I am a
> graduate of that program and have been an instructor for that curriculum
> at a local state college. I think that it is an excellent foundation no
> matter what your IT focus is in the future and would encourage anyone in
> the IT field to get the first semester book at a minimum. An IT knowledge
> built on the OSI model (or even TCP/IP model) will do wonders for your
> troubleshooting skills.
>
> Next, 16 is not a gateway... 16 in the last octet would be the network
> number. Network number and Gateway are not the same thing. A gateway is
> the IP address, from the useable pool of addresses, assigned to another
> router in that network. All devices that have interfaces should have the
> same first three octets and the last octet should be a value between (and
> including) 17-30. Each interface should also have the subnet mask
> 255.255.255.240. Assuming that the 28-bit mask is correct, anything other
> than 255.255.255.240 for the mask is wrong... not saying it won't work,
> but it's wrong.
>
> For a basic example, lets look at this in the good ol' 192.168.1.0
> 255.255.255.0 space, common to practically every home-class broadband
> router available. When you unbox the thing, it is configured with an ip
> address of 192.168.1.1 on it's LAN interface. You would then use that IP
> address as your "gateway" setting on any internal device. 192.168.1.0
> (the network number) isn't typed as a setting anywhere, because it is a
> mathematical result of "anding" an IP address and the mask. So, if your
> PC is 192.168.1.10 on this network and your mask is 255.255.255.0 let's
> "and" them.
>
> 192.168.1.10 = 11000000.10101000.00000001.00001010
> 255.255.255.0 = 11111111.11111111.11111111.00000000
> anding result = 11000000.10101000.00000001.00000000
>
> So, we convert that back to decimal and we get 192.168.1.0... Our network
> number!
>
> Your original post says that you entered .16 as the "gateway ip" in
> Endian. That tells me that you have told Endian it needs to go to a
> router at 88.255.199.16 to get to the Internet. Now that we know that 16
> is a network number and not a useable IP address on this network, we see
> that it definitely is not the correct setting for this field.
>
> Whomever is giving your a connection to the outside world, probably the
> same entity that told you to use this address space, should be able to
> tell you which of your pool of addresses is the correct IP to use as your
> gateway.
>
> Mike K.
>
> ________________________________
>
> From: ozgurerdogan [mailto:[EMAIL PROTECTED]
> Sent: Fri 10/17/2008 03:54
> To: efw-user@lists.sourceforge.net
> Subject: Re: [Efw-user] Entering correct subnet mask stops connection?
>
>
>
>
> Thats exatcly what I meant Mike Knisely. I am a CCNA student and I know
> all
> what you explained. So I have 16-31 and my netmask would be
> 255.255.255.240
> and 16 is my gateway (network ID) and 31 is my broadcast ip and I use only
> 17-30 ip inside network.
>
> I do not remember why I entered 31 as netmask but at the moment it is
> running so. Maybe my datacenter did something in router so I can not enter
> 240, I will call them today. But by entering 240, I think I am doing
> correct
> settings right?
>
> Thank you very much.
> --
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>
>
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>
Mike you are gergous, You simple summarize basic Cisco lessons of our class
:) I am still at the begining of the course.
I found my problem but still confuised a bit. I talked to datacenter and
that said that entered different values in their router because I entered
incorrect settings in endian. They say they maked my pool larger by in fact
using large ip pool for me to get to internet.
I know my network ID is 16 but and subnet is 28 bit so 255.255.255.240. But
datacenter entered in their router 255.255.255.224 which is a larger network
than mine (because of my settings are not correct)
So is that why my 88.255.199.16 can responds ping requests ?
Thanks a lot
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