Re: unable to renew ip
Hi,
On 07/03/14 13:31, Dan Purgert wrote:
> On 07/03/2014 06:35, lina wrote:
>> Hi,
>>
>> I use dhclient and just switch to google dns server.
>>
>> For months, I have bees stuck with the eth0 ip address 172.21.100.159
>
> Uh, that's part of the private class-B range (172.16.0.0/12). You're
> getting it from your local DHCP server.
>
> Only way to change that would be to drop the IP address, and then flush
> the DHCP server tables so that it doesn't re-assign you the same IP address.
>
> Short version of how it works is you get a lease for (e.g.) a day ...
> then when the day is up, your computer asks if the "just expired"
> address is still available. If it is, the lease is renewed with the
> same IP address.
>
>>
>> For couple of hours, the interaction is unbearably slow.
>>
>> I changed to another cable, tried the `# dhcline -r` and `# dhclient`,
>> but all not works.
>>
>> Are there some suggestions about how to change the IP address?
>>
>> Thanks,
>>
>>
>
>
> Not sure how/why Jerome decided that the DHCP server is a windows box
> though.
As a matter of fact, it was meant to be a private email (sorry):
I know the place, the environment is a windows one;
and I experienced a lot of unexpected behaviour with
the local DHCP server.
>
> Your IP address should have no effect on your connection speed (i.e.
> getting a new one won't help you any). You have to find out what's
> causing your connection's throughput to be slow.
>
> Some possibilities:
>
> (LAN)
> - Other things using the network (torrents, youtube, VoIP, etc)
> - QoS limiting what you're trying to do (torrents, youtube) in favor
> of something else (VoIP)
> - Router can't cope with the above
> - you've been hard-limited (on the router) to 10 mbit (or 100 mbit),
> and you were on gbit.
>
> (WAN)
> - ISP has over-sold the loop (generally cable)
> - ISP has over-sold the backhaul (DSL, fiber)
> - ISP fscked up your modem's provisioning, and you're on (e.g.) 10/1
> when you should be on 50/5 (etc.)
>
>
>
Cheers,
Jerome
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