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Polycom 670s and PowerConnect switches
Good Morning All,
I am having some strange networking issues with a handful of Polycom 670 IP Phones.
I have a deployment of about 40 phones here in our local HQ. We have 3 phones that are continuously having issues on the network. We also recently had a switch replaced do to hardware issues and after the replacement the issue persists.
The 3 phones in question never obtain and address via DHCP. When connected the phone hangs in a state waiting for a reply to its broadcast. Connected anywhere in our network topology, this occurs. Weather the phone is configured for a tagged or untagged or native VLAN, the behavior is the same. This is across multiple switches as well.
Assigning a static address to the end point, allows for connectivity. Moving the end point to a home router (linksys) i set up in my office, its able to obtain an IP address.
At this point I am trying to track down what could be causing the problem.
My POE switch that most of the phones are attached to is a 6248P my server switches that uplink via a trunk to the POE switch are 6224's in a stack. I also uplink to a small dell POE switch next door from my POE switch. All uplinks are trunks.
Thank you for the help in advance
Anonymous
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August 29th, 2012 09:00
Are all phones configured the same? Or are these 3 configured differently from the other 37?
If all the phones are to be used in the same manner, and you have the majority working. I would start with this. Take one of the phones that is not working, and plug it into a port that is currently being used by a phone that is working. Then plug that phone that was working, into the port of a phone that was not working.
Possible outcome 1.
Phone that was not working starts to work, and phone that was working stops working.
In this situation we can look at the configurations of the specific ports, to compare the differences between the working and nonworking port.
Possible outcome 2.
Phone that was not working, continues to not work. Phone that was working, continues to work.
In this situation was have verified that both ports have good settings and are working with a known good phone. Which would leave use looking at the phone itself, whether it be a setting on the phone, or something physical with the phone.
Keep us updated on these steps.
Thanks.
HH2011
20 Posts
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August 29th, 2012 10:00
Daniel,
We have done this and the phones in question will not respond or send DHCP requests through the PowerConnect switches.
Moving the phones completely off (totally off our network, into the lab on a Linksys router with DHCP server) the PowerConnect switches, they work.
Problem seems to be following the switch or the DHCP sever.
How would I go about mirroring a port to capture its traffic? I'd like to get a more granular view of what is happening and where the DORA process is breaking down.
HH2011
20 Posts
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August 29th, 2012 10:00
I see these errors in the log file;
DHCP client message received on port 1/0/23 VLAN 40 from client 00:04:f2:3a:5e:59 has giaddr set to local address 192.168.4.1. Dropping.
This is the physical address of one of the phones.
The gateway address for this VLAN is the address of the VLANs interface, the 6248P does the routing.
Anonymous
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August 29th, 2012 11:00
To setup port mirroring you will use the mirror command. Found on page 481.
support.dell.com/.../cli_en.pdf
Example
The following example displays how to copy all the data to ethernet port 1/g5.
console(config-policy-classmap)#mirror 1/g5
This is the info I have on that error.
The number of DHCP client messages received whose gateway address, giaddr, is already set to an IP address configured on one of the relay agent's own IP addresses. In this case, another device is attempting to spoof the relay agent's address. The relay agent does not relay such packets. A log message gives details for each occurrence.
Is the DHCP server logging any messages that may help us here?
I will do some more research on this and report back with any findings.
Thanks.
Anonymous
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August 29th, 2012 11:00
The output of show running config may help us also.
HH2011
20 Posts
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August 29th, 2012 12:00
!Current Configuration:
!System Description "PowerConnect 6248P, 3.3.4.1, VxWorks 6.5"
!System Software Version 3.3.4.1
!Cut-through mode is configured as disabled
!
configure
vlan database
vlan 10,20,30,40
vlan routing 10 1
vlan routing 20 2
vlan routing 30 3
vlan routing 40 4
exit
sntp unicast client enable
sntp server 192.168.4.241
stack
member 1 5
exit
ip address 192.168.100.1 255.255.255.0
logging cli-command
logging file debug
logging buffered debug
ip routing
ip route 0.0.0.0 0.0.0.0 192.168.0.1
ip helper-address 192.168.0.123 dhcp
interface vlan 10
name "Data"
routing
ip address 192.168.0.252 255.255.255.0
exit
interface vlan 20
name "Cornerstone"
routing
ip address 192.168.2.1 255.255.255.0
ip helper-address 192.168.0.123 dhcp
exit
interface vlan 30
name "Wi-Fi"
routing
ip address 192.168.3.1 255.255.255.0
exit
interface vlan 40
name "Voice"
routing
ip address 192.168.4.1 255.255.255.0
ip helper-address 192.168.0.123 dhcp
exit
username "admin" password fc42064e314d98442c92de1558cbc4bf level 15 encrypted
dhcp l2relay
dhcp l2relay vlan 40
!
interface ethernet 1/g1
switchport voice detect auto
switchport mode trunk
switchport trunk allowed vlan add 10
exit
!
interface ethernet 1/g2
switchport voice detect auto
switchport mode trunk
switchport trunk allowed vlan add 20,30,40
exit
!
interface ethernet 1/g3
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g4
switchport voice detect auto
switchport access vlan 40
exit
!
interface ethernet 1/g5
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g6
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g7
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g8
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g9
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g10
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g11
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g12
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g13
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g14
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g15
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g16
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g17
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g18
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g19
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g20
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g21
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g22
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g23
switchport voice detect auto
switchport access vlan 40
exit
!
interface ethernet 1/g24
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g25
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g26
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g27
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g28
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g29
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g30
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g31
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g32
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g33
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g34
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g35
switchport voice detect auto
dhcp l2relay
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g36
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g37
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g38
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g39
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g40
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g41
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g42
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g43
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g44
switchport voice detect auto
switchport mode general
switchport general pvid 10
switchport general allowed vlan add 10
switchport general allowed vlan add 40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g45
switchport voice detect auto
exit
!
interface ethernet 1/g46
switchport voice detect auto
exit
!
interface ethernet 1/g47
switchport voice detect auto
switchport access vlan 10
exit
!
interface ethernet 1/g48
switchport voice detect auto
switchport access vlan 40
exit
!
interface ethernet 1/xg1
switchport voice detect auto
exit
!
interface ethernet 1/xg2
switchport voice detect auto
exit
!
interface ethernet 1/xg3
switchport voice detect auto
exit
!
interface ethernet 1/xg4
switchport voice detect auto
exit
!
interface port-channel 1
switchport voice detect auto
exit
!
interface port-channel 2
switchport voice detect auto
exit
!
interface port-channel 3
switchport voice detect auto
exit
!
interface port-channel 4
switchport voice detect auto
exit
!
interface port-channel 5
switchport voice detect auto
exit
!
interface port-channel 6
switchport voice detect auto
exit
!
interface port-channel 7
switchport voice detect auto
exit
!
interface port-channel 8
switchport voice detect auto
exit
!
interface port-channel 9
switchport voice detect auto
exit
!
interface port-channel 10
switchport voice detect auto
exit
!
interface port-channel 11
switchport voice detect auto
exit
!
interface port-channel 12
switchport voice detect auto
exit
!
interface port-channel 13
switchport voice detect auto
exit
!
interface port-channel 14
switchport voice detect auto
exit
!
interface port-channel 15
switchport voice detect auto
exit
!
interface port-channel 16
switchport voice detect auto
exit
!
interface port-channel 17
switchport voice detect auto
exit
!
interface port-channel 18
switchport voice detect auto
exit
!
interface port-channel 19
switchport voice detect auto
exit
!
interface port-channel 20
switchport voice detect auto
exit
!
interface port-channel 21
switchport voice detect auto
exit
!
interface port-channel 22
switchport voice detect auto
exit
!
interface port-channel 23
switchport voice detect auto
exit
!
interface port-channel 24
switchport voice detect auto
exit
!
interface port-channel 25
switchport voice detect auto
exit
!
interface port-channel 26
switchport voice detect auto
exit
!
interface port-channel 27
switchport voice detect auto
exit
!
interface port-channel 28
switchport voice detect auto
exit
!
interface port-channel 29
switchport voice detect auto
exit
!
interface port-channel 30
switchport voice detect auto
exit
!
interface port-channel 31
switchport voice detect auto
exit
!
interface port-channel 32
switchport voice detect auto
exit
!
interface port-channel 33
switchport voice detect auto
exit
!
interface port-channel 34
switchport voice detect auto
exit
!
interface port-channel 35
switchport voice detect auto
exit
!
interface port-channel 36
switchport voice detect auto
exit
!
interface port-channel 37
switchport voice detect auto
exit
!
interface port-channel 38
switchport voice detect auto
exit
!
interface port-channel 39
switchport voice detect auto
exit
!
interface port-channel 40
switchport voice detect auto
exit
!
interface port-channel 41
switchport voice detect auto
exit
!
interface port-channel 42
switchport voice detect auto
exit
!
interface port-channel 43
switchport voice detect auto
exit
!
interface port-channel 44
switchport voice detect auto
exit
!
interface port-channel 45
switchport voice detect auto
exit
!
interface port-channel 46
switchport voice detect auto
exit
!
interface port-channel 47
switchport voice detect auto
exit
!
interface port-channel 48
switchport voice detect auto
exit
snmp-server community public rw
exit
HH2011
20 Posts
0
August 29th, 2012 12:00
I don't really understand the definition of the error.
HH2011
20 Posts
0
August 29th, 2012 12:00
What does not make sense about that error to me is the fact this is a layer 3 device.
With routing enabled on its interfaces and it being the router as well, clients are going to have their gateway address, set to the interfaces address, hence the locality.
And the fact all the other phones and devices on each VLAN have their gateway address set to the VLANs interface IP on the switch.
Anonymous
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August 29th, 2012 12:00
yeah it is kind of open ended, I am doing some research on it.
Anonymous
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August 30th, 2012 13:00
Thank you for the running config output. Looking it over the firmware appears to be up to date, and the config on the switch all looks good. I do not see anything in the config we could change, or anything that would cause an issue with DHCP.
At this point I think it would be best to contact support at 1-800-945-3355. Get a case open on this, they can take down more information on your network topology, DHCP server settings, and look more in depth to this issue.
Thanks.