[FS#765] Ethernet Carrier does NOT trigger Hotplug Event on TPLink CPE510 (DHCP not working)

LEDE Bugs lede-bugs at lists.infradead.org
Sat May 6 01:17:41 PDT 2017 

A new Flyspray task has been opened.  Details are below. 

User who did this - Bluse-Blue (Bluse) 

Attached to Project - LEDE Project
Summary - Ethernet Carrier does NOT trigger Hotplug Event on  TPLink CPE510 (DHCP not working)
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Hi all,

//Symptoms of the Problem://
In our Freifunk Mesh we do operate several TPLink CPE510 as mesh routers in combination with a CPE210 as AP. The DHCP server of dnsmasq got not started on the ethernet interfaces and hence no clients get a lease.

//Setup://

  * Hardware: The Mesh CPE510 & the AP CPE210 are in a daisy-chain setup:  PoE power supply comes into the CPE510 via LAN, the WAN port is connected to the CPE210 LAN port. When the CPE510 boots up it triggers a script that sets the GPIO pins for PoE path-through on the CPE510's WAN port to power-up the connected CPE210.

  * Software: latest LEDE trunk 4094

//Current Workaround://
Trigger "ifup lan" after 60sec timeout by /etc/rc.local in order to get the DHCP ranges applyed to the ethernet interfaces

//Troubleshooting://

  * compare output of /etc/init.d/dnsmasq after booting and after manually triggering the "ifup lan" event:

after boot up, with no dhcp running

+ local stamp=/var/run/dnsmasq.cfg02411c.eth0.1.dhcp
+ local rv=0
+ [ -s /var/run/dnsmasq.cfg02411c.eth0.1.dhcp ]
+ devstatus eth0.1
+ jsonfilter -e @.carrier
+ return 1
+ return 0


after "ifup lan", where dhcp is properly working
+ local stamp=/var/run/dnsmasq.cfg02411c.eth0.1.dhcp
+ local rv=0
+ [ -s /var/run/dnsmasq.cfg02411c.eth0.1.dhcp ]
+ jsonfilter -e @.carrier
+ devstatus eth0.1
+ udhcpc -n -q -s /bin/true -t 1 -i eth0.1
udhcpc: started, v1.26.2
udhcpc: sending discover


So while booting of the CPE510, there is not yet a ethernet carrier, hence no dhcp is started. But there seems to be the hotplug event missing once the attached CPE210 is booted up.

  * add debug output to the hotplug events leeds to:
hotplug: block

TYPE: block ACTION: add INTERFACE:  DEVICE:  
TYPE: block ACTION: add INTERFACE:  DEVICE:  
TYPE: block ACTION: add INTERFACE:  DEVICE:  
TYPE: block ACTION: add INTERFACE:  DEVICE:  
TYPE: block ACTION: add INTERFACE:  DEVICE:  
TYPE: net ACTION: add INTERFACE: tunl0 DEVICE:  
TYPE: net ACTION: add INTERFACE: ifb0 DEVICE:  
TYPE: net ACTION: add INTERFACE: ifb1 DEVICE:  
TYPE: ieee80211 ACTION: add INTERFACE:  DEVICE:  
TYPE: net ACTION: add INTERFACE: wlan0 DEVICE:  
TYPE: net ACTION: add INTERFACE: eth0.7 DEVICE:  
TYPE: iface ACTION: ifup INTERFACE: evergate DEVICE: roaming0 roaming0
TYPE: net ACTION: add INTERFACE: roaming0 DEVICE:  
TYPE: net ACTION: add INTERFACE: eth0.1 DEVICE:  
TYPE: net ACTION: remove INTERFACE: wlan0 DEVICE:  
TYPE: net ACTION: add INTERFACE: wlan0 DEVICE:  
TYPE: firewall ACTION: add INTERFACE: lan DEVICE: eth0.1 eth0.1
TYPE: firewall ACTION: add INTERFACE: evergate DEVICE: roaming0 roaming0
TYPE: firewall ACTION: add INTERFACE: mesh0 DEVICE: wlan0 wlan0
TYPE: iface ACTION: ifup INTERFACE: lan DEVICE: eth0.1 eth0.1
TYPE: firewall ACTION: remove INTERFACE: lan DEVICE: eth0.1 eth0.1
TYPE: firewall ACTION: remove INTERFACE: mesh0 DEVICE: wlan0 wlan0
TYPE: firewall ACTION: remove INTERFACE: evergate DEVICE: roaming0 roaming0
TYPE: firewall ACTION: add INTERFACE: lan DEVICE: eth0.1 eth0.1
TYPE: firewall ACTION: add INTERFACE: mesh0 DEVICE: wlan0 wlan0
TYPE: firewall ACTION: add INTERFACE: evergate DEVICE: roaming0 roaming0
TYPE: iface ACTION: ifup INTERFACE: loopback DEVICE: lo lo
TYPE: iface ACTION: ifup INTERFACE: mesh0 DEVICE: wlan0 wlan0
TYPE: firewall ACTION: remove INTERFACE: lan DEVICE: eth0.1 eth0.1
TYPE: firewall ACTION: remove INTERFACE: mesh0 DEVICE: wlan0 wlan0
TYPE: firewall ACTION: remove INTERFACE: evergate DEVICE: roaming0 roaming0
TYPE: firewall ACTION: add INTERFACE: lan DEVICE: eth0.1 eth0.1
TYPE: firewall ACTION: add INTERFACE: mesh0 DEVICE: wlan0 wlan0
TYPE: firewall ACTION: add INTERFACE: evergate DEVICE: roaming0 roaming0
CPE210 via gpio poe truned on


After the CPE210 got powered up via gpio & PoE pass-through, there is no further hotplug event triggered, as someone would expect.
So maybe swconfig for that device is not working properly ?

Any hints how to solve that problem ?

GReetings from Berlin
Bluse


///etc/config/network//

config interface 'loopback'
        option ifname 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config globals 'globals'
        option ula_prefix 'fd1b:ca05:dc2e::/48'

config interface 'lan'
        option ifname 'eth0.1'
        option proto 'static'
        option ipaddr '10.14.4.1'
        option netmask '255.255.255.0'

config interface 'evergate'
        option ifname   'roaming0'
        option proto    'static'
        option ipaddr   '192.168.1.1'
        option netmask  '255.255.0.0'

config device 'roaming0'
        option ifname 'eth0.7'
        option name 'roaming0'
        option type 'macvlan'
        option macaddr 'AA:BB:CC:DD:EE:77'

config interface 'mesh0'
        option proto 'static'
        option ipaddr '10.14.10.4'
        option netmask '255.0.0.0'

config switch
        option name 'switch0'
        option reset '1'
        option enable_vlan '1'

config switch_vlan
        option device 'switch0'
        option vlan '1'
        option vid '1'
        option ports '4t 0t'

config switch_vlan
        option device 'switch0'
        option vlan '7'
        option vid '7'
        option ports '4t 0t'


///etc/config/dhcp//

config dnsmasq
        option domainneeded '1'
        option boguspriv '1'
        option localise_queries '1'
        option rebind_protection '1'
        option rebind_localhost '1'
        option local '/lan/'
        option domain 'lan'
        option expandhosts '1'
        option sequential_ip '1'
        option allservers '1'
        option noping '0'
        option authoritative '1'
        option readethers '1'
        option leasefile '/tmp/dhcp.leases'
        option resolvfile '/tmp/resolv.conf.auto'
        option localservice '0'
        option cachesize '8192'
        option cachelocal '1'
        list server '8.8.8.8'
        list server '8.8.4.4'
        list server '208.67.222.222'
        option nonwildcard '0'

config dhcp 'lan'
        option interface 'lan'
        option start '10.14.4.100'
        option limit '100'
        option leasetime '1h'
        list dhcp_option '3,10.14.4.1'
        list dhcp_option '6,10.14.4.1'

config dhcp 'mesh'
        option interface 'mesh0'
        option ignore '1'

config dhcp 'evergate'
        option interface 'evergate'
        option start '192.168.14.100'
        option limit '100'
        option leasetime '1h'
        list dhcp_option '3,192.168.1.1'
        list dhcp_option '6,192.168.1.1'










More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=765

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