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Posted by on June 22, 2005, 11:04 am
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Netgear WGR614 v.5 wireless router, with latest firmware. I'm trying to
set up reserved LAN addresses for three machines. So, under "LAN IP
Setup", I followed the directions to do so, giving, e.g., one machine
192.168.1.10, the device name the machine's hostname, and the correct
MAC address. I run Linux, so I restarted /etc/init.d/net.eth0.
However, upon dhcpc getting an IP from the router, I get, e.g.,
192.168.1.4, not .. .10. The router will not allow me to set a reserved
address outside the range set under "Use Router as DHCP Server", which
is the default, .2 to .51. If anyone has any hints or pointers, I'd
really appreciate it. Thanks.
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Posted by Quaoar on June 22, 2005, 2:25 pm
jb_is_not@home.now wrote:
> Netgear WGR614 v.5 wireless router, with latest firmware. I'm trying
> to set up reserved LAN addresses for three machines. So, under "LAN
> IP Setup", I followed the directions to do so, giving, e.g., one
> machine 192.168.1.10, the device name the machine's hostname, and the
> correct MAC address. I run Linux, so I restarted
> /etc/init.d/net.eth0. However, upon dhcpc getting an IP from the
> router, I get, e.g., 192.168.1.4, not .. .10. The router will not
> allow me to set a reserved address outside the range set under "Use
> Router as DHCP Server", which is the default, .2 to .51. If anyone
> has any hints or pointers, I'd really appreciate it. Thanks.
I do not understand how the assignment of a reserved address by the
router can be handled except as a function of a modified DHCP auto
assignment, nor do I understand how this can be a problem. The computer
can ask for an auto address or a static address. A static address
assigned by the router does exactly what you want except it does not
provide assurance that you won't have defined the same static address
request for two computers, making address management difficult. If,
however, the router can reserve addresses that it knows will be
requested via DHCP by given MAC addresses, then there will be assurance
that each computer receives a unique address that you define, presuming
that the router will check for duplicates when you enter the data.
Since the computer requested an address via DHCP, and the reservation
in the router was not in the specified DHCP reserved block, I can see
why the router would go ahead and assign its own address in the DHCP
reserved block and ignore the definition outside of it. Yes, the router
programming should have caught your error in definition of the reserved
address outside the DHCP block; that it didn't is a firmware programming
oversight. Otherwise, I think the router is performing logically as it
should. Frankly, given the sorry state of "features" performance in
home routers, you are lucky that Netgear implemented at least the basic
feature, if not the data entry error checking that would have warned of
your request for a reserved address not within the DHCP auto assingment
block.
Q
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Posted by on June 24, 2005, 10:13 pm
jb_is_not@home.now wrote:
>
> Netgear WGR614 v.5 wireless router, with latest firmware. I'm trying to
> set up reserved LAN addresses for three machines. So, under "LAN IP
> Setup", I followed the directions to do so, giving, e.g., one machine
> 192.168.1.10, the device name the machine's hostname, and the correct
> MAC address. I run Linux, so I restarted /etc/init.d/net.eth0.
> However, upon dhcpc getting an IP from the router, I get, e.g.,
> 192.168.1.4, not .. .10.
Are you sure that DHCP was even trying to get an IP from the router? If
the old lease hasn't expired, it will probably just continue to use it.
And if it has expired, it may well try to renew it (which the router may
well allow) rather than trying to get a new IP address. You may have to
blow away all the cached DHCP info before restarting.
-Larry Jones
I think football is a sport the way ducks think hunting is a sport. -- Calvin
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