Cisco Switching/Routing :: 3560 Ports Have Stopped Powering Phones
Apr 9, 2012
We are experiencing two of our layer 3 switches (3560 PoE and 3750 PoE) switches giving us problems with giving power to IP phones. These switches have an embedded PoE module and would previously give power to all IP phones on all its ports. Now all of a sudden over the past few months 6 of these ports have stopped powering phones. The phones are the same ie. 7911 and they take less than 15.4 W. We believe that the PoE module has started malfunctioning and has stopped giving power to all the ports. The port 'grants' power and then removes it. Below is a link showing all the messaged we receive on the terminal session. It is NOT a hardware fault with the PoE: [code]
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May 15, 2012
have problem with switch. 3560, Some of gi ports have outdiscards errors and switching is very slow.
ServerSwitch>show int counters errors
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Gi0/1 0 0 0 0 0 8722
Gi0/2 0 0 0 0 0 157
Gi0/3 0 0 0 0 0 0
Gi0/4 0 0 0 0 0 0
Gi0/5 0 0 0 0 0 0
Gi0/6 0 0 0 0 0 446
Gi0/7 0 0 0 0 0 0
Gi0/8 0 0 0 0 0 0
Gi0/9 0 0 0 0 0 0
Gi0/10 0 0 0 0 0 0
Gi0/11 0 0 0 0 0 0
Gi0/12 0 0 0 0 0 1705658
Gi0/13 0 0 0 0 0 9
Gi0/14 0 0 0 0 0 74
Gi0/15 0 0 0 0 0 0
Gi0/16 0 0 0 0 0 0
Gi0/17 0 0 0 0 0 9
Gi0/18 0 0 0 0 0 0
Gi0/19 0 0 0 0 0 0
Gi0/20 0 0 0 0 0 0
Gi0/21 0 0 0 0 0 0
Gi0/22 0 0 0 0 0 0
Gi0/23 0 0 0 0 0 922
Gi0/24 0 0 0 0 0 0
But in monitoring i see only 80 Mbit max bandwith utilization on gigabit links.
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Apr 25, 2012
I have a connection between switches, There are a 3560 (Gi0/37) and a 2960 (Gi0/1), the problem is in the port Gi0/37 of the 3560 switch and this is the log. [code]
I dont understand what is the problem, actually i have added the command power inline never on the port and the problem is solved, but we haven´t changed configuration.
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Jan 21, 2013
As per the attached diagram: How do I configure the 2 ports on the 3560 (Ports 6 & 7) and the connected ports on each of the 2960 switches (Port 25) to provide redundancy.
If the up link from Switch A dies then I need the traffic to flow through the trunk and utilize the up link on Switch B with minimal delay (milliseconds).
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Feb 14, 2012
i have 2 cisco 1522 series out door LAP connected to a 3560 POE switch which is not powering up, while ordering my dealer told that it will work with POE, and its go live stage, is there any way to upgrade switch with any IOS version where i can get enough power for 1522?
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Nov 4, 2011
Which smaller POE switch is capable of powering a 9971 IP phone with a cam and a think client attached?
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May 13, 2012
I am working in Private IT company. The facility is having 4000 users and it is a high resliency site having two core switches and nearly 40 access switches. All core and access switches are 4506E switches and odd vlan is taking core-1 and even vlan is core-2. We are having cisco ip phones 6921 connected as daisy chain.( Phone is connected to access switch and the desktop is connected to ip phones). The Ip phone are getting registered cisco call maneger server. The call manager one leg is connected to one core switch and another one is core 2 same like my DHCP server.
For all vlans the the default gateway is my firwall. The voice needs to hit the call manager, hence we have implemented a source routing to call manager for the voice vlans. the problem is once we down the Core-1 some of the IP phones are not getting registered no matterit is on odd or even vlan. The same issue for Core-2. We suspect that there might be some issue in the DHCP server for voice vlan routing. But server team is saying that there is no issue with the DHCP server.Now network is vulnerable that if any core switch is down my voice ip phones will be down.
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Jun 5, 2009
I have some Catalyst 3560 PoE switches running the latest 12.2(50)SE1 image. I have a working configuration for STP, QoS, Voice & Access VLANs, Port-Security & IGMP snooping - I stress this is working PERFECTLY. Now I have been playing with wired 802.1x port authentication for a while which again I have sucessfully deployed on ports without IP Phones. I did some more testing with 802.1x clients behind some Cisco IP Phones and after understanding the issues and workarounds I thought I had a working environment. The environment is XP SP3 with the new separate wired 802.1x supplicant, workstations are all in a 2003 AD Domain and the wired 802.1x settings are configured through group policy. I had issues with Windows Server 2003 SP2 not working behind IP Phones but this I put down to the supplicant being different from the new one in XP SP3. MS don't have any plans for Server 2003 SP3 (or XP x64 SP3?) nor can I find any hotfixes to resolve this so it's a 'caveat'.Anyway I have tested this many times and with XP SP3 and the new supplicant it all seems to work well (only the access VLAN is using 802.1x Authentication, I am not authenticating the IP Phones via 802.1x).
Now today it stopped working and 802.1x clients behind the 7970 IP Phones no longer authenticate. I have spent an hour or so looking at this and the IOS is the same, as is the configuration on the IAS (Radius) server, as are the XP clients. I was scratching my head a bit and then looked at the IP Phone - the software on the phone has been upgraded to 8.5(2) - previously it was 8.4(4). I managed tp downgrade the software via CUCM to 8.4(4) and it now works. I have retested it several times so this is obviously an issue (either a new feature or a bug?) with the latest code for the 7970. I have checked and it's the same codebase for all the latest IP Phones - 7906, 7911, 7931, 7941, 7942, 7945, 7961, 7962, 7965, 7970, 7971 & 7975 which was released on 1st June. I have looked through the release notes and EAP-FAST has been added but this is an update to the EAP supplicant on the phone and not a feature of the 802.1x pass-thru from the attached device. I can find no other 802.1x or EAP references.
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Mar 12, 2013
We are facing problem with Cisco IP phones which are connected to module WS-X4248-RJ45V.Phones are getting restarted and sometimes phones will not take power.Initially we suspected issue with power consumption, but we have enough power in the module.
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May 29, 2013
I just installed a refurb'd 3560 48 port POE switch and configured all ports on VLAN100. All Polycom IP 430 phones (with power adapter and without power adapter) constantly reboot every couple minutes. Any Cisco 7960 phone does not constantly reboot and works correctly. When I plug a small unmanaged switch into a 3560 port and then plug the Polycom phone into the unmanaged switch powering the phone with a power adapter, the phone works correctly. So it seems that the 3560 is causing the Polycom to reboot.
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May 15, 2012
I would like to know if there an specific configuration in order to apply QoS configuration in Switches 3750X for Polycoms Phones.I was reviewing the information from Cisco but mostly of them apply only for cisco phones, and just some or basic for non cisco phones.
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Mar 21, 2013
I have a Catalyst 2960-S switch and a pre-standard IP Phone (Cisco 7960). When I connect the phone to the switch the switch recognizes the phone and supplies power. I would like to prevent this behaviour. ie. I would like to disable detection of pre-standard equipment. Is there a command I can issue on the 2960-S to do this? For example, on a switch from a different vendor I can issue the command: no power pre-std-detect to prevent it from detecting the 7960 phone, is there an equivalent command on the Catalyst 2960-S ?
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Nov 18, 2012
We have a couple of 7911 that get stuck in Registering, each monday. During the week, no user reports the problem. But after the weekend, we get ready to hear complaints from our collegues. The same phones often experience this issue, although the other phones report no problems. The problem is temporarily solved when we issue "shut/no shut" on switch ports.
phone firmware version: SCCP11.8-5-2S
Interface configuration:
interface FastEthernet1/0/27
[Code].....
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Nov 13, 2011
Will ACL110 allow IP phones communicate with VoIP server. Do I need to add line to allow multicast traffic? [code]
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Apr 9, 2013
I have a Cisco 6500 which has two VLANs defined
VLAN 30 for Data VLAN
VLAN 31 for Voice VLAN
I have two Cisco 3750 switches.both switches are connected to IP Phones.the configuration of Cisco 6500 Trunk Port to Cisco 3750 is [code] On Cisco 3750, the trunk port to 6500 has the configuration [code].The IP Phones connected to the Cisco 3750 are 7911,7979, 7940, 7961.
All phone are working fine, the phones get their ip address from voice vlan, and systems connected to phones get from data vlan, except 7940/7960.
These two models of IP Phones remain on Configuring IP, and when you check the IP Settings, it gives Data VLAN IP, which does not have a TFTP.once you manually enter TFTP address in the field, it registers instantly, due to ip routing in the network.
these phones were working fine before, but suddenly few days back they went out of the network, and still are in Configuring IP state.I also tried to convert these ports connected to 7940/7960 to access ports [code] but still the IP is taken from the Access Vlan (30). Even If you configure a single VLAN on these ports, the IP phones then never get the IP.
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Oct 7, 2012
I just trying to setup a dhcp server in my catalyst 3560 switch for a nortel ip phones. I show you mmy configuration:
VOICE VLAN: 3
DATA VLAN: 1
S1:10.2.110.200
port:4100
Nortel IP Phones: IP 2002 (Firmware Version 0604D9H) & IP 1110 (Firmware Version 0623C7)
Switch Configuration:
aaa new-model!aaa session-id commonip subnet-zeroip routing!ip dhcp pool datos network 10.2.100.0 255.255.255.0 default-router 10.2.100.1 lease 0 2!ip dhcp pool voice network 10.2.110.0 255.255.255.0 default-router 10.2.110.200 option 191 ascii "VLAN-A:3" option 128 ascii "Nortel-i2004-A,10.2.100.200:4100,1,5." lease 0 2!!!!no file verify autospanning-tree mode pvstspanning-tree extend system-id!vlan internal allocation policy
[Code]...
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Oct 23, 2012
I'm having some trouble with a 4510 Switch Line Card. I need some recomendations for troubleshooting it.We have some PoE phones connected to the card number 3. When those phones were restarted, they did not go up again. In order to discard wiring issues, we connected the phone directly to the card 3, and the phone did not go up. If the phone is connected to a different card, it goes up correctly.
Additionally, to restore the service, these phones were migrated to other cards, but when we disconnect the equipment, ports in line card 3 remain in an up / up state (and nothing is connected to those ports!!), and only reflect the actual state after restarting the port.What steps could I do in order to troubleshoot this issue?. What should I look for, or how do I discriminate the problem? Might it be a hardware issue, a PoE issue?
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Jan 2, 2012
All of our VoIP phones bounced (re-registered) in the middle of the work day and we do not know why. There is no maintenance going on at this time. The phones came back up right away. Upon further investigation, I only found one error message on our core switch (WS-6509 running IOS ver. 12.2(18)SXF13) and I'm wondering if that was the cause:
Jan 3 13:51:04.030: %SIBYTE-SP-5-SB_OUT_OF_RX_DSCR_CH1: Out of RX descriptors on mac 0 - channel 1 (count: 299)
I cannot find any other instances of this error message from the internet.
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Sep 25, 2011
We are facing issue with one of the module installed on cico 4506 swicth. All of a sudden cisco phones connected to that module went down and the messages logged on the console. [code]
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Apr 12, 2012
provide a sample Voice Vlan configuration for the Cisco 2960 POE switch to work with the Non-Cisco IP Phones?
Will these commands work? Vlan 2 is the new voice vlan, Vlan 1 is the data vlan.
mls qos
interface fastethernet 0/1mls qos trust cos switchport nonegotiateswitchport mode trunkswitchport trunk encapsulation dot1qswitchport voice vlan 2priority−queue outspanning-tree portfastspanning−tree bpduguard enable
vlan 2name voice
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Oct 15, 2012
I'm trying to configure LLDP-MED between a Cat45010+E Sup7 (IOS 15.1) and Polycom CX600 Lync phones. I have created and applied the correct network policy for the interfaces.
From these sites, I need to send all the correct TLVs or the phones won't respond: {URL}.
When a scour the config of the switch, I can't find any related configuration commands relating to the specific LLDP-MED TLV components which are enabled/disabled. Where are they hiding? I would like to confirm which TLVs are being sent by my switch and if they are matched to the phone. I can always use the DHCP method, put this is not preferred.
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Oct 22, 2012
We currently have around 150 2975 switches and have had problems with it them not handing out PoE power to the cisco phones and access points at random times. There is plenty of power left for the switch to use. We have at least 15 that will be running fine for about a week and then all of the devices that use PoE power will shut off and will not come back on until we reload the switch. If you console in there aren't any messages that pop up and if you look at the port it just shows on connected or will show IeeePD in the power inline. We have contacted Cisco TAC and they just RMA them.
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Jan 4, 2012
I have a CUCM BE environment with a number of remote users with 8961 phones connecting to an ASA 5501 via AnyConnect. The phones register fine and can make inbound/outbound calls as well as four digit dialing to other users at the corporate site.
The problem is when a remote user tries to four digit dial another remote phone. The called phone will ring but there is dead air once answered and then the line goes dead.
This sounds like a routing issue to me. How to get AnyConnect clients to be able to reach each other?
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Mar 1, 2012
I have 7 POE switches that have ESI IP phones attached. I have two VLANS, 1 and 2. VLAN 2 is used for voice and is defined in each switch.The ESI IP phones connect to my POE switch ports and the pc attaches through the ESI IP phone.
I have had voice quality issue between floors in my building. Talking to others on my floor via the IP phone, there are no voice quality issues. [code]
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Feb 27, 2012
Any issues with SXJ and source specific multicast? We upgraded our core from SXI6 to SXJ2 and multicast stopped working for all but our L3 links.Our L2/L3 links stopped working and the only thing that has changed is the IOS version. All the configurations are still valid etc. Currently have a call open with TAC.
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Aug 19, 2012
I upgraded my 6509-Es (sup720s) to 122-33.SXJ3 and now the banner command can not end when I include the ^ at the end. It seems to be stuck in text edit mode IE and usually hitting enter following that brings me back to command but it doesn't do anything but bring me to the next line.
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Apr 19, 2012
Cisco 3560 does not support "set ip next-hop verify-availabilty". I need this command in my config. "set ip next-hop" do not do the same job.
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Dec 8, 2011
The last few days I've been exploring options in getting rid of some old routers accross a wan connections. I have a cat 3560 to play with and I thought I would try and use the no switchport command test out routing with switch. I've got some type of route issue and I tried a few things which I thought would fix the issue but had no effect. I'll post the config and a few commands so you can see what the basic setup is.
Here we can see in the arp that it knows about both 10.7.1.2 (PC unable to ping 10.3.3.254) as well as 10.3.3.254 (ASA).I tried adding in a ip route of 10.7.0.0 255.255.0.0 10.3.3.110 as well as 10.3.3.254. Neither produced the results I wanted allowing 10.7.1.2 (PC) to ping the ASA (10.3.3.254). [code]
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May 8, 2012
I have an environment of 3 X 3560G of which I have 1st switch-CORE(f0/10) connecting to the VPN router(CE) interface-f0/0. Remaining 2 Cisco 3560's(Access) are connected to Gi0/1 and Gi0/2 on the 1st switch-CORE via gi0/1 . On all three switches I have created multiple VLANs and assigned ports to these VLAN. The switch to switch connection is trunk allowing all VLANs created on all these 3 switches. Now the issue is how I am going to have all these VLANs routed through single interface on the routeri-e f0/0, as all these subnets will communicating to remote site over VPN. What should be default gateway on the 2 Access switches and the CORE switch, also what static route should be on router to reach all subnets(VLANs) created on these 3 switches.
I have read inter-VLAN routing i-e creating sub interfaces on router but dont want to proceed with that and looking for any other way to have my VLANs talk on all three switches and then are accessible to remote site ove VPN?
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Apr 17, 2012
I have tried to make policy based routing on Cisco 3560. I use ipservices ios (SW version 12.2.(50)SE3 and SW-IMAGE C3560-IPSERVICESK9-M) For below configuration there is no problem and pbr is working.
“Access-list 100 permit ip host 1.1.1.1 host 2.2.2.2
Access-list 101 permit ip host 1.1.1.1 host 3.3.3.3
Route-map pbr1 permit 10
Match ip address 100
Set ip next-hop verify-availability 1.1.1.2 1 track 11
interface fasthethernet 0/1
ip policy route-map pbr1”
But when i add another sequence to the "pbr1" with another sequence number like that.
“Route-map pbr1 permit 11
Match ip address 101
Set ip next-hop verify-availability 1.1.1.3 1 track 12”
pbr is not working. Switch gives message "PLATFORM_PBR-3-UNSUPPORTTED_RMP:Route-map pbr1 not supported for Policy Based Routing”"ip policy route-map pbr1" command not shown in the running config. And "show ip policy" output is blank.Configuration guide says you have insert many sequence to the route-map with the same name. And also this command is not in the unsupported command list.
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Jun 4, 2013
I am trying to get my workstation to talk to a workstation on a different sub-net through a Cisco 3560 switch. The switch is running the following IOS version: [code]
My primary network is 172.16.0.0 and I am trying to connect to a device on a 192.168.111.0 sub-net. [code]
What would be the best way to get the two workstations talking via the switch?
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Dec 11, 2012
I implemented access list on cisco 3560 switch but it never works. I want to block access from network B to Network A and allow from Ato B
Network A. 10.0.12.0/24
Network B 10.0.24.0/24
The configuration is
interface Vlan1
description Data VLAN
[Code].....
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Apr 28, 2012
We recently purchased Cisco 3560X Layer3 Switch. We need to perform simple Inter VLAN routing. We have configured VLAN1 (name-server_vlan) and VLAN2 (name- user_vlan). We have also assigned the Ports and IP address to both the VLANs. After assiging this if we plug Laptop A into VLAN1 then it doesnt communicates with Laptop B (btw, Laptop A is able to Ping VLAN2 Gateway ) in VLAN2 but on the other hand Laptop B is able to communicate with Laptop A and ping everything i.e. Gateway of VLAN1.
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