Dear Community,
we're observing a very interesting problem with IP-Phones connected to a SG350x-24p stack using LLDP-MED.
Problemdescription:
Almost everytime we connect or restart a new IP-Phone (Mitel MiVoice 69x0 with actual Firmware 5.x) to our 2-member SG350x-24P Stack (FW 2.5.0.90) the Master-Switch reboots.
Errorlog:
03-Dec-2019 16:57:59 :%STCK SYSL-A-UNITMSG: UNIT ID 1,Msg:%AUTOSMARTPORT-F-DEV_CALC_FAILED: XDP device type calculation failed: interface gi2/0/20 - capability 3
***** FATAL ERROR *****
Reporting Task: BRMN.
Software Version: 2.5.0.90 (date Sep 26 2019 time 16:12:12)
base_address=0xb4684000
ros(+0x78ac20)[0xb4e0ec20]
ros(HOSTG_fatal_error+0x10)[0xb4e11224]
ros(OSSYSG_fatal_error+0x2a0)[0xb53dbce4]
ros(+0xb598c0)[0xb51dd8c0]
ros(+0xd710f8)[0xb53f50f8]
ros(+0xde6904)[0xb546a904]
ros(+0xde0418)[0xb5464418]
ros(+0xded5a8)[0xb54715a8]
ros(+0xdf1dc4)[0xb5475dc4]
ros(+0xc883a8)[0xb530c3a8]
/lib/libp2linux.so.1(task_run+0xf4)[0xb4614818]
#######################################################
04-Dec-2019 17:33:51 %AUTOSMARTPORT-F-DEV_CALC_FAILED: XDP device type calculation failed: interface gi2/0/19 - capability 3
***** FATAL ERROR *****
Reporting Task: BRMN.
Software Version: 2.5.0.90 (date Sep 26 2019 time 16:12:12)
base_address=0xb4681000
ros(+0x78ac20)[0xb4e0bc20]
ros(HOSTG_fatal_error+0x10)[0xb4e0e224]
ros(OSSYSG_fatal_error+0x2a0)[0xb53d8ce4]
ros(+0xb598c0)[0xb51da8c0]
ros(+0xd710f8)[0xb53f20f8]
ros(+0xde6904)[0xb5467904]
ros(+0xde0418)[0xb5461418]
ros(+0xded5a8)[0xb546e5a8]
ros(+0xdf1dc4)[0xb5472dc4]
ros(+0xc883a8)[0xb53093a8]
/lib/libp2linux.so.1(task_run+0xf4)[0xb4611818]
***** END OF FATAL ERROR *****
^^ this event was logged before the last reboot.
I first tought, it depends on a not completly deactivated smartport-configuration. So I deaktivated everything concerning smartports.
Global Config:
macro auto disabled
no macro auto processing cdp
no macro auto processing lldp
macro auto processing type host disabled
macro auto processing type ip_phone disabled
macro auto processing type ip_phone_desktop disabled
macro auto processing type switch disabled
macro auto processing type ap disabled
Interface config:
no macro auto smartport
no macro auto persistent
But these settings did not work. The reboots still persist.
So I disabled LLDP globally - the reboots went away, but our phones didn't get the Right voice vlan via LLDP-MED and all other LLDP devices were not shown anymore.
So I decided to implement the following workaround:
I re-enabled LLDP globally, but disabled LLDP receive on the voice enabled (oui enabled) switchports. Meanwhile we now distribute the VLAN Information via DHCP.
Our voice config now on an Access-Switch-Stack (one port exampe):
voice vlan id 910
voice vlan state oui-enabled
voice vlan oui-table add 08000f Mitel_IPphones
interface vlan 810
name Clients
interface vlan 910
name VoIP
interface GigabitEthernet2/0/20
storm-control broadcast level 1
spanning-tree portfast
spanning-tree guard root
switchport mode general
switchport general allowed vlan add 810 untagged
switchport general pvid 810
no lldp receive
voice vlan enable
!
As far as I found out, this bug last quite a long time in the Firmware of Small-Business-Switches.
We hope, that this issue will be solved soon. Otherwise, LLDP-MED is not usable for voice vlans.
You'll find an open bug under: CSCvq71611
I didn't check, if the bug persists under SG500-stacks and SG550x-stacks.
Best regards,
Florian
(CCDP, CCNP R+S, CCNA wireless, CCNA Collaboration)
