can't ping anything but the gateway

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FFC

Member
Oct 23, 2001
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Could people please try to stop using phrases such as class A, class B and class C, they haven't been relevant for a long time and they confuse people. IP networking is now classless even cisco acknowledged this by changing the default behaviour of most aspects of IOS from classful to classless.
 

n0cmonkey

Elite Member
Jun 10, 2001
42,936
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<< Could people please try to stop using phrases such as class A, class B and class C, they haven't been relevant for a long time and they confuse people. IP networking is now classless even cisco acknowledged this by changing the default behaviour of most aspects of IOS from classful to classless. >>



Who mentioned classes? I thought I did the uhmm other way, CIDR. Oh yeah, wasnt it the CCNA :p
 

CTho9305

Elite Member
Jul 26, 2000
9,214
1
81


<<

<< Could people please try to stop using phrases such as class A, class B and class C, they haven't been relevant for a long time and they confuse people. IP networking is now classless even cisco acknowledged this by changing the default behaviour of most aspects of IOS from classful to classless. >>



Who mentioned classes? I thought I did the uhmm other way, CIDR. Oh yeah, wasnt it the CCNA :p
>>



wow, i have no idea what any of that means. except for the various classes... I know them ;)
 

n0cmonkey

Elite Member
Jun 10, 2001
42,936
1
0


<<

<<

<< Could people please try to stop using phrases such as class A, class B and class C, they haven't been relevant for a long time and they confuse people. IP networking is now classless even cisco acknowledged this by changing the default behaviour of most aspects of IOS from classful to classless. >>



Who mentioned classes? I thought I did the uhmm other way, CIDR. Oh yeah, wasnt it the CCNA :p
>>



wow, i have no idea what any of that means. except for the various classes... I know them ;)
>>



If you see an ip range like 10.0.0.0/8 that would be CIDR. /8 /16 /24 /32 are all CIDR endings. I believe it represents how many bits are in the Network section of the ip (in my earlier example 10 would be the network part of the ip and the last 3 octets would be the host part). Someone correct me if Im wrong please :)
 

FFC

Member
Oct 23, 2001
100
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What you are describing is CIDR notation. CIDR itself is more detailed and is described in rfc 1519. RFC1519

The basic idea behind CIDR was to slow down the depletion of IP address space so that we wouldn't run out of addresses or routing table capacity before IPV6 appeared. It has been so successful that take up of IPV6 is virtually non existant.
 

Santa

Golden Member
Oct 11, 1999
1,168
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n0cmonkey,

You are correct in your thinking about the /8 CIDR notation as saying First 8 bits is the network and remaining bits are the hosts.

But one thing confuses me.. why would you need 16646144 IPs for a home network??? Man you must have one hell of a p0rn server farm :)

Most times reducing the mask (or increasing it depend on how you think of the mask) will help simplify your network so you are not interfereing with someone elses. In your case you may never interfere with anyone elses as long as you keep your network isolated from anyone elses. Try and setup a VPN with someone else who has a 10 subnet and prepare for a world of hurt since according to your router you own just about every IP under 10.x.x.x hehe..
 

n0cmonkey

Elite Member
Jun 10, 2001
42,936
1
0


<< What you are describing is CIDR notation. CIDR itself is more detailed and is described in rfc 1519. RFC1519 >>



Thanks for the link. I didnt think I could get the full definition, but a general over view was good enough for me at the time ;)




<< n0cmonkey,

You are correct in your thinking about the /8 CIDR notation as saying First 8 bits is the network and remaining bits are the hosts.

But one thing confuses me.. why would you need 16646144 IPs for a home network??? Man you must have one hell of a p0rn server farm :)
>>



No, its just easier. Dont ask why, Im not going into it. ;)
Most people use the 192.168.0.0/24 addresses anyhow, so 10.0.0.0/8 sets me apart :p



<< Most times reducing the mask (or increasing it depend on how you think of the mask) will help simplify your network so you are not interfereing with someone elses. In your case you may never interfere with anyone elses as long as you keep your network isolated from anyone elses. Try and setup a VPN with someone else who has a 10 subnet and prepare for a world of hurt since according to your router you own just about every IP under 10.x.x.x hehe.. >>



I can easily change it. I use 10.130.0.0 really, not 10.0.0.0. So a quick switch and I own a small part. :)