[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [cobalt-users] [RAQ4] IP address not working as expected... what to check?

Greg,

At 16:14 11/12/2002 -0600, you wrote:

>Change the netmask in your webUI.


ok - I've got ask - what wrong with me setting the netmask to 255.255.255.0 ??

Anything else is just a pain in config tables right?
Before making any changes to your Cobalt server network configuration you need to speak with your Service Provider and clarify the exact details of you IP allocation.
In your original email you indicated that your Provider had allocated you a block of 16 IP addresses (/28 in CIDR notation): 

Details for 65.101.207.160/28
Number of usable addresses is 14
Netmask is 255.255.255.240
First IP address usable is 65.101.207.161
Last IP address usable is 65.101.207.174
Broadcast IP address is 65.101.207.175
Several list members have pointed out that your server is configured with multiple IP addresses using the subnet mask for a block of 8 IP addresses (/29 in CIDR notation): 

Details for 65.101.207.160/29
Number of usable addresses is 6
Netmask is 255.255.255.248
First IP address usable is 65.101.207.161
Last IP address usable is 65.101.207.166
Broadcast IP address is 65.101.207.167
In a subsequent email you have also indicated that your required at least 48 usable IP addresses, which would require an allocation of a block of 64 IP addresses (/26 in CIDR notation).
Ask your Service Provider for the correct details that they have assigned for your server. If they have assigned the correct number then amend your server network details from the web UI. If the assigned range is lower than your requirement then explain this to your Provider who may need to assign you a new block.
To answer your question directly: changing the netmask(s) to 255.255.255.0 (/24 in CIDR notation) would in theory allow you the use of 254 usable addresses but in the worst case scenario you may lose remote connectivity to the server plus you will undoubtedly annoy the Service Provider. This action may also result in your server stealing IP address use from other customer servers and once again annoying your Provider. The result is going to largely depend on how your Provider configures their network devices.
In summary: don't make any changes until you can speak with a technical member of staff at your Provider.
For information on IP address allocations take a look at the Iana web site (http://www.iana.org/ipaddress/ip-addresses.htm). Your IP addresses are part of the Arin range (http://www.arin.net/). 

        denial



>
>Chris
>----- Original Message -----
>From: "Greg Hewitt-Long" <cobaltusers@xxxxxxxxxxxxxxxxxxx>
>To: <cobalt-users@xxxxxxxxxxxxxxx>
>Sent: Wednesday, December 11, 2002 3:22 PM
>Subject: Re: [cobalt-users] [RAQ4] IP address not working as expected...
>what to check?
>
>
>> >Explain to me what your problem is. I may have a solution. Please give me
>> >details.
>>
>>
>> The machine is using the wrong netmask on these IPs - how do I change the
>netmask on these IPs?  Am I right in saying that this something that the
>colocation provider should be setting the subnet - but can I alter it or
>even control how they are bound on my server?
>>
>>
>>
>> The
>>
>> >Tom
>> >
>> >----- Original Message -----
>> >From: "Greg Hewitt-Long" <cobaltusers@xxxxxxxxxxxxxxxxxxx>
>> >To: <cobalt-users@xxxxxxxxxxxxxxx>
>> >Sent: Wednesday, December 11, 2002 3:59 PM
>> >Subject: Re: [cobalt-users] [RAQ4] IP address not working as expected...
>> >what to check?
>> >
>> >
>> >> >Greg Hewitt-Long wrote:
>> >> >
>> >> >>>What does ifconfig -a show?
>> >> >>>
>> >> >>>
>> >> >>
>> >> >>eth0:9    Link encap:Ethernet  HWaddr 00:10:E0:04:C8:F1          inet
>> >addr:65.101.207.167  Bcast:65.101.207.167  Mask:255.255.255.248
>> >> >>         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>> >> >>         Interrupt:11 Base address:0x6100
>> >> >>
>> >> >This is obvious not working, as you see the ip-address is the same as
>the
>> >broadcast-address.
>> >> >
>> >> >In this net (65.101.207.160/29) the following adresses are useable:
>> >> >
>> >> >65.101.207.160 Network (not useable)
>> >> >65.101.207.161 Useable 65.101.207.162 Useable
>> >> >65.101.207.163 Useable
>> >> >65.101.207.164 Useable
>> >> >65.101.207.165 Useable
>> >> >65.101.207.166 Useable
>> >> >65.101.207.167 Broadcast (not useable)
>> >> >
>> >> >As you see you are trying to use 7 ipaddresses in a 255.255.255.248
> > >subnet (29 bit) where only 6 is available, but if your raq4 is not your
> > >gateway, only 5 are useable.
> > >> >
> > >> >
> > >> >By the way, this is also wrong: (you are using networkaddress as real
>> >address)
>> >> >
>> >> >eth0:11   Link encap:Ethernet  HWaddr 00:10:E0:04:C8:F1          inet
>> >addr:65.101.207.168  Bcast:65.101.207.175  Mask:255.255.255.248
>> >> >         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>> >> >         Interrupt:11 Base address:0x6100
>> >>
>> >>
>> >>
>> >> Both you and Bill have pointed out an error, or mistake - but neither
>> >offered a solution, or even a link to one.  If you have a solution, I'd
>love
>> >to hear about it.
>> > >
>> > > >
>> > > >Hans Kristian Eiken
>> > > --
>> > > http://www.webyourbusiness.com/
>> > > Providers of E-Commerce Software &
>> > > Web Design Consultancy and Services.
>> > > PH: (970) 266-0195   FAX: (970) 266-0158
>> >>
>> >> _____________________________________
>> >> cobalt-users mailing list
>> >> cobalt-users@xxxxxxxxxxxxxxx
>> >> To subscribe/unsubscribe, or to SEARCH THE ARCHIVES, go to:
>> >> http://list.cobalt.com/mailman/listinfo/cobalt-users
>> >>
>> >>
>> >
>> >_____________________________________
>> >cobalt-users mailing list
>> >cobalt-users@xxxxxxxxxxxxxxx
>> >To subscribe/unsubscribe, or to SEARCH THE ARCHIVES, go to:
>> >http://list.cobalt.com/mailman/listinfo/cobalt-users
>>
>> --
>> http://www.webyourbusiness.com/
>> Providers of E-Commerce Software &
>> Web Design Consultancy and Services.
>> PH: (970) 266-0195   FAX: (970) 266-0158
>>
>> _____________________________________
>> cobalt-users mailing list
>> cobalt-users@xxxxxxxxxxxxxxx
>> To subscribe/unsubscribe, or to SEARCH THE ARCHIVES, go to:
>> http://list.cobalt.com/mailman/listinfo/cobalt-users
>>
>
>_____________________________________
>cobalt-users mailing list
>cobalt-users@xxxxxxxxxxxxxxx
>To subscribe/unsubscribe, or to SEARCH THE ARCHIVES, go to:
>http://list.cobalt.com/mailman/listinfo/cobalt-users

--
http://www.webyourbusiness.com/
Providers of E-Commerce Software &
Web Design Consultancy and Services.
PH: (970) 266-0195   FAX: (970) 266-0158

_____________________________________
cobalt-users mailing list
cobalt-users@xxxxxxxxxxxxxxx
To subscribe/unsubscribe, or to SEARCH THE ARCHIVES, go to:
http://list.cobalt.com/mailman/listinfo/cobalt-users