Voice Vlan not working

[rsthakur]

In a single subnet total 10 2960-x switch install when I put new 2960-s series switch then in s series switch and x series(switch provide uplink to s series) IP telephone not working(It’s show verify your network connection) but data vlan working fine.

Switch Ports Model                     SW Version            SW Image

------ ----- -----                     ----------            ----------

*    1 28    WS-C2960S-24PS-L          15.2(2)E9             C2960S-UNIVERSALK9-M

Switch Ports Model                     SW Version            SW Image

------ ----- -----                     ----------            ----------

*    1 28    WS-C2960X-24PD-L          15.2(4)E8             C2960X-UNIVERSALK9-M

S and X series configartion:-

interface GigabitEthernet1/0/1

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/2

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/3

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/4

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/5

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/6

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/7

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/8

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/9

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/10

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/11

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/12

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/13

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/14

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/15

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/16

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/17

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/18

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/19

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/20

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/21

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast

!

interface GigabitEthernet1/0/22

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

!

interface GigabitEthernet1/0/23

 switchport mode trunk

!

interface GigabitEthernet1/0/24

 switchport mode trunk

!

interface GigabitEthernet1/0/25

!

interface GigabitEthernet1/0/26

!

interface GigabitEthernet1/0/27

!

interface GigabitEthernet1/0/28

!

interface Vlan1

 no ip address

 shutdown

!

interface Vlan30

 ip address 172.28.xxx.xx 255.255.248.0

!

ip default-gateway 172.28.xxx.254

ip http server

ip http secure-server

!

!

!

snmp-server community xxxxxxxxxxx RO

!

line con 0

line vty 0 4

 password 7 122A125606084F067C

 login

line vty 5 15

 login

!

ntp server ntp.iiserb.ac.in

ntp server 172.30.x.x

end

[balaji.bandi]

Voice VLAN not working ?  - are you not getting IP address ? or Phones are not registering ?

Where is the Layer 3 interface for switchport voice vlan 5 ?  - i do not see any config on this switch (other than VLAN assigned to Switch port)

what ports it conencted to uplink switch, can you provide uplink switch config ?

where is your DHCP Server ? is in the switch or 3rd party DHCP Server - need this information.

[rsthakur]

Voice VLAN not working ?  - are you not getting IP address ? or Phones are not registering ?

Only show verify your network connection

Where is the Layer 3 interface for switchport voice vlan 5 ?  - i do not see any config on this switch (other than VLAN assigned to Switch port)

NAME: "C6807-XL", DESCR: "Cisco Systems, Inc. Catalyst 6807 7-slot Chassis System"

Cisco IOS Software, s2t54 Software (s2t54-IPSERVICESK9-M), Version 15.2(1)SY1a, RELEASE SOFTWARE (fc6)

interface GigabitEthernet1/1

 description UTP For CC VLAN 30 (172.28.xxx.254/21)

 switchport

 switchport mode trunk

 switchport trunk allowed vlan 1,5,19,30

interface Vlan5

 description Voice VLAN

 ip address 172.25.x.xx0 255.255.0.0

ip route 0.0.0.0 0.0.0.0 172.xx.x.254

ip route 172.25.0.0 255.255.0.0 172.25.x.xxx

what ports it conencted to uplink switch, can you provide uplink switch config ?

sh cdp n

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

                  S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,

                  D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID

CC_test_28.xxx.xx

                 Gig 1/0/21        153              S I   WS-C2960X Gig 1/0/22

SEP7C210D9649EE  Gig 1/0/22        155             H P M  IP Phone  Port 1

Switch configuration:-

interface GigabitEthernet1/0/1

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/2

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/3

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/4

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/5

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/6

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/7

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/8

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/9

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/10

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/11

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/12

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/13

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/14

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/15

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/16

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/17

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/18

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/19

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/20

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/21

 switchport access vlan 30

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/22

 switchport access vlan 30

 switchport mode access

 switchport voice vlan 5

 storm-control broadcast level 1.00

 storm-control multicast level 1.00

 spanning-tree portfast edge

!

interface GigabitEthernet1/0/23

 switchport mode trunk

!

interface GigabitEthernet1/0/24

 switchport mode trunk

!

interface GigabitEthernet1/0/25

!

interface GigabitEthernet1/0/26

!

interface TenGigabitEthernet1/0/1

!

interface TenGigabitEthernet1/0/2

!

interface Vlan1

 no ip address

 shutdown

!

interface Vlan30

 ip address 172.28.xxx.xx 255.255.248.0

!

ip default-gateway 172.28.xxx.2xx

!

ip http server

ip http secure-server

!

!

snmp-server community iiserbsnmp2k RO

!

line con 0

line vty 0 4

 password 7 097F59480D0654105D

 login

line vty 5 15

 login

where is your DHCP Server ? is in the switch or 3rd party DHCP Server - need this information.

Data VLAN dhcp working on Linux dhcp server

Voice VLAN dhcp working in voice router CISCO2911/K9

[balaji.bandi]

If the Phone connect to Cat 6K switch is that works ?  Please post limited information - Long configuration please attach as text file easy to read.

what ports it conencted to uplink switch, can you provide uplink switch config ?

the output not able to read correctly  if the below ports connected to uplink they are access ports
interface GigabitEthernet1/0/21
interface GigabitEthernet1/0/22

Data VLAN dhcp working on Linux dhcp server   - what is this IP address ? what port it connected on Cisco Switch of 6500?

Voice VLAN dhcp working in voice router CISCO2911/K9    what is this IP address ? what port it connected on Cisco Switch of 6500?

[rsthakur]

We have a total of 350 running cisco IP Telephone on different 2 subnets. So there is no problem with the configuration of the backend router or L3 switch.

If any subnet  I was put 2960 S series switch with 2960X series switch then the problem will start(Link flapping and telephone doesn’t work).

If I replace 2960 S series switch with 2960X switch then all network work smoothly.

Problem is only with recently purchase 50 new 2960X series switch. Before this, we have 100 x series switch and 100 s series switch and all are working fine together.

We attach x series switch configuration (uplink Switch) and s series switch. The configuration is the same of all switch only interface IP change.

Before that (attach x series switch configuration) total 19 X series switch connected in this subnet and 5 telephones connected. All are working fine.

[balaji.bandi]

As Per my understanding you have only issue with "2960X series switch" rest all working as expected.

The config attached to post uplink switch ? is this 2960X series switch  config ? - please confirm

Can you post 

show version

show macro auto device

show run interface x/x - one of the interface config, where you connect Phone flapping ?

what you see on the logs that time ?

For testing i want to default one of the interface and test and advise as below config

default interface GigabitEthernet1/0/1
!
interface GigabitEthernet1/0/1
switchport mode access
switchport access vlan 30
switchport voice vlan 5
spanning-tree portfast
no shutdown

[rsthakur]

The config attached to post uplink switch ? is this 2960X series switch  config ? - please confirm

Yes

For testing i want to default one of the interface and test and advise as below config

default interface GigabitEthernet1/0/1
!
interface GigabitEthernet1/0/1
switchport mode access
switchport access vlan 30
switchport voice vlan 5
spanning-tree portfast
no shutdown

Try this but no result.

Remaining thing attach on word file.

[balaji.bandi]

switch port going down PD removed ( this may be bug i am thinking, i do not see any otehr reason)

what Model of Phone is this ? Cisco or 3rd party ?

show power inline

sh interface status error

[rsthakur]

switch port going down PD removed ( this may be bug i am thinking, i do not see any otehr reason)

This is not a bug when I manually remove phone then this log accrue.

what Model of Phone is this ? Cisco or 3rd party ?

Cisco CP-7821, Cisco CP-3905

sh power inline

Module Available Used Remaining
(Watts) (Watts) (Watts)
------ --------- -------- ---------
1 370.0 3.3 366.7
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/1 auto off 0.0 n/a n/a 30.0
Gi1/0/2 auto off 0.0 n/a n/a 30.0
Gi1/0/3 auto off 0.0 n/a n/a 30.0
Gi1/0/4 auto off 0.0 n/a n/a 30.0
Gi1/0/5 auto off 0.0 n/a n/a 30.0
Gi1/0/6 auto off 0.0 n/a n/a 30.0
Gi1/0/7 auto off 0.0 n/a n/a 30.0
Gi1/0/8 auto off 0.0 n/a n/a 30.0
Gi1/0/9 auto off 0.0 n/a n/a 30.0
Gi1/0/10 auto on 3.3 IP Phone 7821 1 30.0
Gi1/0/11 auto off 0.0 n/a n/a 30.0
Gi1/0/12 auto off 0.0 n/a n/a 30.0
Gi1/0/13 auto off 0.0 n/a n/a 30.0
Gi1/0/14 auto off 0.0 n/a n/a 30.0
Gi1/0/15 auto off 0.0 n/a n/a 30.0
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/16 auto off 0.0 n/a n/a 30.0
Gi1/0/17 auto off 0.0 n/a n/a 30.0
Gi1/0/18 auto off 0.0 n/a n/a 30.0
Gi1/0/19 auto off 0.0 n/a n/a 30.0
Gi1/0/20 auto off 0.0 n/a n/a 30.0
Gi1/0/21 auto off 0.0 n/a n/a 30.0
Gi1/0/22 auto off 0.0 n/a n/a 30.0
Gi1/0/23 auto off 0.0 n/a n/a 30.0
Gi1/0/24 auto off 0.0 n/a n/a 30.0

sh interface gig1/0/10 status err-disabled

Port Name Status Reason Err-disabled Vlans
Gi1/0/10 connected none

[balaji.bandi]

suggest to run - debug ilpower ( connect the device and post the logs)

other options i suggest :

interface GigabitEthernet1/0/1
power inline port 2x-mode
shut
no shut

[rsthakur]

interface GigabitEthernet1/0/1
power inline port 2x-mode
shut
no shut

After this command phone is registered but the voice breaks frequently.

Log attach on notepad

[balaji.bandi]

Good to know the phone can get connected.

but the voice breaks frequently.

Can you post after full config. (current one).

voice break is different issue, we need to look, hope same issue not there other switches (thinking may be QoS on the port).

Can you also post working switch config to understand the issue.

[rsthakur · Accepted solution]

After a long discussion finally, I got the solution. It is a spanning tree related problem.

Thanks to everyone to provide valuable knowledge and support.