mirror of
https://github.com/pygos/init.git
synced 2024-11-05 12:17:10 +01:00
83 lines
2.7 KiB
Markdown
83 lines
2.7 KiB
Markdown
# Static Network Configuration
|
|
|
|
The default configuration provides multiple services that perform network
|
|
initialization and static configuration using helper scripts that require
|
|
programs from the `iproute2` package.
|
|
|
|
Configuration files are typically stored in `/etc/netcfg/` (depending on
|
|
configure options).
|
|
|
|
Please note that the loopback device is treated specially and not included in
|
|
any of the network configuration outlined below. The loopback device is brought
|
|
up and configured by a dedicated service long before the network configuration
|
|
is done.
|
|
|
|
|
|
## Interface Renaming
|
|
|
|
If the `ifrename` service is enabled (it is disabled by default), network
|
|
interfaces are renamed based on a rule set stored in the file `ifrename`.
|
|
The file contains comma separated shell globing patterns for the current
|
|
interface name, MAC address and a prefix for the new interface name.
|
|
|
|
For each network interface, rules are processed top to bottom. If the first two
|
|
globing patterns apply, the interface is renamed. Interfaces with the same
|
|
prefix are sorted by mac address and a running index is appended to the prefix.
|
|
|
|
If none of the rules apply, the interface name is left unchanged.
|
|
|
|
|
|
The intent is, to provide a way to configure persistent, deterministic names for
|
|
at least all network interfaces that are permanently installed on a board.
|
|
|
|
Extension cards or external network adapters should be given a different prefix
|
|
to avoid changes in the order as they come and go.
|
|
|
|
|
|
## Interface Configuration
|
|
|
|
After interface renaming, for each network interface, the configuration path is
|
|
scanned for files with the same name as the interface.
|
|
|
|
Each successfully found configuration file is processed line by line, top to
|
|
bottom. Each line may contain a keyword, followed by multiple arguments.
|
|
|
|
The following keywords can be used to add IPv4 or IPv6 network addresses to
|
|
an interface:
|
|
|
|
* address
|
|
* addr
|
|
* ip
|
|
* ip6
|
|
* ipv6
|
|
|
|
Those commands are expected to be followed by an IPv4 or IPv6 address and
|
|
network mask.
|
|
|
|
|
|
Furthermore, the following commands can be used for configuring interface
|
|
parameters:
|
|
|
|
* `arp {on|off}`
|
|
* `multicast {on|off}`
|
|
* `mtu <value>`
|
|
* `offload [rx {on|off}] [tx {on|off}] [sg {on|off}] [tso {on|off}]`
|
|
* `offload [gso {on|off}] [gro {on|off}] [lro {on|off}] [rxvlan {on|off}]`
|
|
* `offload [txvlan {on|off}] [ntuple {on|off}] [rxhash {on|off}]`
|
|
* `offload [ufo {on|off}]`
|
|
|
|
|
|
## Route Configuration
|
|
|
|
After interface configuration is done, routes and rules are restored from a
|
|
file named `routes` in the same configuration path.
|
|
|
|
The file may contain lines starting with `route` or `rule`. Everything that
|
|
follows is passed on to `ip route add` or `ip rule add` respectively.
|
|
|
|
|
|
## Net Filter Tables
|
|
|
|
|
|
An additional service is provided that restores the nft rule set from
|
|
`/etc/nftables.rules`.
|