Raspian Jessie Static IP issue

[pattere]

I have been searching, and cannot find this issue.

I have attempted to set the /etc/dhcpcd.conf file for a static ip. I can get the ip and mask to report correctly when running an ifconfig; but, the gateway reports incorrectly.

When running the ifconfig, I receive:
inet addr: 10.10.12.15
Bcast: 10.10.**.255 -- This should be 10.10.**.254
Mask: 255.255.255.0

The section of the dhcpcd.conf I edited to set the ip address:
# Set static ip address
iface eth0
static ip_address=10.10.**.15/24
static routers=255.255.255.0
static domain_name=10.10.**.254
static domain_name_servers=10.10.**.*** 10.10.**.**

I am able to ping my gateway from the Rpi, and addresases on the same subnet. But, I cannot ping machines on other subnets, or get to the outside world. What do I need to do to get the gateway to report/function correctly on the pi?

[DougieLawson]

You're putting the mask as the router, that will never work.

Code: Select all

interface eth0
static ip_address=10.10.12.15/24
static routers=10.10.12.rrr
static domain_name_servers=10.10.12.yyy 10.10.12.zzz
#
interface wlan0
static ip_address=10.10.12.www
static routers=10.10.12.rrrr
static domain_name_servers=10.10.12.yyy 10.10.12.zzz

Where .eee is your RPi's static address for eth0
.www is your RPi's static address for wlan0
/24 is a shorthand for for 255.255.255.0 (24 bits are 1, 8 bits are 0)
.rrr is your home router's address
.yyy is your DNS #1
.zzz is your DNS #2

/24 is the more logical CIDR format for IPv4 network masks.

[epoch1970]

So you've subnetted 10/8, that's a choice.
I think you want to use this...
Network 10.10.12.0
Address 10.10.12.15
Broadcast 10.10.12.255
Netmask 255.255.255.0
DNS 10.10.12.254
... unless your subnet isn't 10.10.12.0/24

I don't think there is an option such as "domain_name=<IP quad>" in dhcpcd, but I'm not used to this software.

You can use a tool like ipcalc to stop guessing and start using the right values, even for cryptic subnets. I like this one: http://jodies.de/ipcalc (ipcalc is also a debian package if you want to run it locally.)

(BTW, obfuscating private LAN adresses borders on useless -you're protected by your firewall- and makes reading difficult.)

EDIT: The DNS address is my guess. I see you have 2 DNS servers inside your LAN? Normally one is enough, especially if it's colocated with your gateway. If it's down, you're done anyway...

[pattere]

Thanks for the replies.

When searching further, I have found that I should only need to set:

/etc/dhcpcd.conf
interface eth0
static ip_address=192.168.0.10/24
static routers=192.168.0.1
static domain_name_servers=192.168.0.1 8.8.8.8

***This is just an example from: https://wiki.archlinux.org/index.php/dh ... ic_profile***

So, my question is... Is the static routers supposed to be my gateway? And, if so, why does the setting of 10.10.**.254 report as Bcast 10.10.**.255?
Or, am I completely off base in the way I am trying to set the gateway?

[KCarscadden]

Probably the answers to your questions are here:

http://www.jeffgeerling.com/blog/2016/s ... spberry-pi


Keith

[epoch1970]

So, my question is... Is the static routers supposed to be my gateway?

Yes. A router is just another name for a gateway, basically.

[mfa298]

So, my question is... Is the static routers supposed to be my gateway? And, if so, why does the setting of 10.10.**.254 report as Bcast 10.10.**.255?

It will report the Bcast (Broadcast) address as 10.10.**.255, because that is the Broadcast address. The Broadcast address is not the router/gateway address.

The Broadcast address is the last address in the network and shouldn't be assigned to anything. It's used by certain things as a way to sending data to all hosts (there's also the "network number" .0 in a /24 network that does something similar).