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Opened 4 years ago

#15069 new defect

RTL8366RB switch - sending (bogus?) RRCPv3 packets every 2sec

Reported by: anonymous Owned by: developers
Priority: normal Milestone: Chaos Calmer 15.05
Component: kernel Version: Trunk
Keywords: switch, RTL8366RB, rrcp, dgn3500 Cc:

Description

Flashed a build from r39717 onto my DGN3500.
Am able to get everything working, but noticed that I'm seeing odd packets coming out from the device every 2s.
No odd traffic during startup (can ping and tftp at U-boot as long as I want).
Once it loads the switch driver, traffic starts up, and continues until reset.
dmesg output:
...
Realtek RTL8366RB ethernet switch driver version 0.2.4
rtl8366rb rtl8366rb.6: using GPIO pins 235 (SDA) and 237 (SCK)
rtl8366rb rtl8366rb.6: RTL5937 ver. 3 chip found
libphy: rtl8366rb.6: probed
etop: invalid MAC, using random
libphy: ltq_mii: probed
(unregistered net_device): no PHY found
etop: mdio probe failed
...

(Note that mac is later set properly by /etc/config/network)

Traffic seen from laptop plugged into switch:
$ tcpdump -nnXXSs 0 -i eth1
07:32:18.023807 00:00:00:00:00:00 > ff:ff:ff:ff:ff:ff, RRCP-0x03 query

0x0000: ffff ffff ffff 0000 0000 0000 8899 0300 ................
0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0030: 0000 0000 0000 0000 0000 0000 ............

07:32:19.813626 00:00:00:00:00:00 > ff:ff:ff:ff:ff:ff, RRCP-0x03 query

0x0000: ffff ffff ffff 0000 0000 0000 8899 0300 ................
0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0030: 0000 0000 0000 0000 0000 0000 ............

07:32:21.603185 00:00:00:00:00:00 > ff:ff:ff:ff:ff:ff, RRCP-0x03 query

0x0000: ffff ffff ffff 0000 0000 0000 8899 0300 ................
0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0030: 0000 0000 0000 0000 0000 0000 ............

07:32:23.392880 00:00:00:00:00:00 > ff:ff:ff:ff:ff:ff, RRCP-0x03 query

0x0000: ffff ffff ffff 0000 0000 0000 8899 0300 ................
0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0030: 0000 0000 0000 0000 0000 0000 ............

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