add initial config daemon script

[hall]

Initial shell script daemon to poll /etc/switch.json for changes. Intended to manage the config describe in #2 and eventually be the backend for #3.

Currently, only PoE enable/disable is implemented as a proof of concept.

The following steps should work for testing.

1. generate the switch.json file:

   switch_status | jq > /etc/switch.json

2. execute the script: ./configd (first time will take a minute, depending on number of ports)
3. edit /etc/switch.json
4. wait up to 10s for change to be made

Implemented:

• [x] enabled
• [ ] lacp
• [ ] stp
• [x] forced link speed
• poe
  • [x] enabled
  • [ ] mode
• vlan
  • [x] pvid
  • [x] allowed
  • [x] tag_in
  • [x] untag_in

[hall]

Added functionality to set the pvid and allowed_vlans. Is there any documentation on this /click filesystem interface? Just sort of poking through what you already have to see what works. For example, I'm not sure which file to write to enable/disable a port.

[halmartin]

Added functionality to set the pvid and allowed_vlans. Is there any documentation on this /click filesystem interface? Just sort of poking through what you already have to see what works. For example, I'm not sure which file to write to enable/disable a port.

The click project exists, but I think it has diverged significantly from what Cisco use on their devices.

I am not aware of any public documentation for the click filesystem.

I'm not sure how to disable a port, that's never been a use case I tested.

Here are some failed attempts:

echo "PORT 2, ALLOWED_VLANS 1, ALLOW_TAGGED_IN 0, ALLOW_UNTAGGED_IN 0, PVID 1, UNTAGGED_VID 1" > /click/switch_port_table/set_vlan_allports_conf

echo "PORT 2, MODE forced, FORCE_SPEED 0" > /click/switch_port_table/set_port_phy_cfgs

[halmartin]

Alright, using another Meraki switch with stock firmware (but with root access) I've figured out how to disable a port:

echo "PORT 1, MODE off" > /click/switch_port_table/set_port_phy_cfgs

To reenable the port, do the following:

echo "PORT 1, MODE aneg" > /click/switch_port_table/set_port_phy_cfgs

You can also force the port speed with the following:

echo "PORT 5, MODE forced, FORCE_SPEED 100fdx" > /click/switch_port_table/set_port_phy_cfgs

[hall]

Nice find! I would never have guessed aneg (even though that's what's shown in /click/switch_port_table/dump_port_phy_cfgs).

I added port enable/disable functionality and a forced link speed setting (where 0 reverts to auto-negotiated).

[hall]

Closing in favor of #29.