how it routes and network question

Deric Kwok deric.kwok2000 at gmail.com
Tue Dec 22 06:31:58 CST 2009


Hi Bruce

Thank you so much to explain me in detail. I would like to know about
this it in case i can get another  hosting company

Yes. I think the netmask should be 255.255.255.255
1/ but why they are using this netmask setting? save ip address?
then does the router handle many routes in this setting?
2/ What is this advantage for the hosting company?
3/ If I need more ip in the same server, how it works?
4/ Why you said the hosting company is cheap to use this configuration?

Thank you again.





>
> <SNIP>
> 2/ lf  the network card in server has problem and need change another
> one, will my ip address change to another ip address also?
> </SNIP>
> Yeah well thats how dhcp works, via ma caddy, i guess you can always spoof
> your old mac address.
>
> <SNIP>
> 3/ why hosting company is using /32 and dhcp? what is advantage? ls it
> easy for administration?
> </SNIP>
> Im guessing because the users are to stupid to understand what a subnet
> mask/gateway is its just easier to get the mac address and assign it to a
> user then let the user assign a ip.
>
>
> Normally in a co-location setup its not like this, inless its very cheap
> hosting.
>
> My co-location has the following setup, and this is how MOST networks should
> be run.
>
> Core router using BGP to transit providers, and other local peers.
> Switched network useing ospf to handle the routes and also VLAN's for the
> customers subnets.
>
> So customer should get a vlan assigned to them (which they have no need to
> know what the number is, they are handed a access mode port.
> Customers also issued a /30 (at least) in most cases a customer will get a
> /29 or /28 depending on what they need.
> In this case of a /30 its a total of 3 address's
> 1, GATEWAY (put on the ISP/HOST switch
> 2, IP ADDRESS FOR SERVER TO USE
> 3, BROADCAST ADDRESS.
>
> Heres an eg of a /30:
>
> Address:   192.168.1.1          11000000.10101000.00000001.000000 01
> Netmask:   255.255.255.252 = 30 11111111.11111111.11111111.111111 00
> Wildcard:  0.0.0.3              00000000.00000000.00000000.000000 11
> =>
> Network:   192.168.1.0/30       11000000.10101000.00000001.000000 00
> HostMin:   192.168.1.1          11000000.10101000.00000001.000000 01
> HostMax:   192.168.1.2          11000000.10101000.00000001.000000 10
> Broadcast: 192.168.1.3          11000000.10101000.00000001.000000 11
> Hosts/Net: 2                     Class C, Private Internet
>
>
> Heres an eg of a /29:
>
> the % ipcalc 192.168.1.1/29
> Address:   192.168.1.1          11000000.10101000.00000001.00000 001
> Netmask:   255.255.255.248 = 29 11111111.11111111.11111111.11111 000
> Wildcard:  0.0.0.7              00000000.00000000.00000000.00000 111
> =>
> Network:   192.168.1.0/29       11000000.10101000.00000001.00000 000
> HostMin:   192.168.1.1          11000000.10101000.00000001.00000 001
> HostMax:   192.168.1.6          11000000.10101000.00000001.00000 110
> Broadcast: 192.168.1.7          11000000.10101000.00000001.00000 111
> Hosts/Net: 6                     Class C, Private Internet
>
> Hope this makes sence.
>
> Regards,
>
> Bruce
>
>
>




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