Please help here!!!

[kiriakos8]

I have apply cisco IP PHONES(7912-7940) in my network recently and i have problems cuz sometimes

the phones restart trying to registered and they create problems in my pc web based applications because it is very time sensitive.

Is anythink that i can do to avoid from restart the link in connection with my switch??

The connection is PC---} PHONE ---}SWITCH.

I have call-manager 4.0 with backup call manager.

My port config in the switch is:

interface FastEthernet0/x

switchport access vlan 10

switchport trunk encapsulation dot1q

switchport trunk native vlan 3

switchport mode trunk

switchport voice vlan 10

spanning-tree portfast

I have different VLAN FOR IP PHONES from the lan.!!!

Anybody can help???

Many thanks.

Xzadio

[milay]

Fact is that if the Phone reboots the switch in the phone rebootstoo, thus you lose network connectivity with the PC. You need to find out why the phones are rebooting. This could be caused by many things, phone load, network, ccm, etc...

You should study the CCM traces on the primary & secondary CCM's to see why the phone is rebooting. IF yo gather a sniffer traces it may be easier to see. Int he CCM traces you want to look to see who unregisterd the phone, CCM or the phone it's self. Also you will want to look at the sniffer trace to see who reset the phone from it's perspective. If the sniffer & ccm traces point at the CCM then it is a CCM isue. If they both point to the Phone the it is more thatn likely a phone load issue. If the CCM says it reset & the phone says it reset then there is some type of network issue, most likely.

From the CCM traces you can assume that a "StationD" comes from CCM & a "StationInit" comes from the phone. You will also want to look at the reason in the "Last=" in the call manager that the phone registered to first after the reset, could be the pri or sec.

This could help also:

http://www.cisco.com/en/US/products/hw/phones/ps154/products_tech_note09186a008009485a.shtml

Mike

[jolo07310]

What model of switch you have???

[kiriakos8]

Hallo

I have 20 switches 3550-2900 series.I don't think

that is the phones or switches problem cuz recently

all my phones start reload(120 IP PHONES).My solution

in my recently problem was to make shutdown both of my CCM and then first open my primary CCM and i open the backup CCM after 30 minutes.

The fact is that that i don't have apply the CISCO

tools(trace etc.)cuz is very new system(2 months).

Is there anythink that i see from administrator console??

Many thanks guys!!!

Xzadio

[jolo07310]

Ok, here is what I think.

Your configuration on switch, only fit to XL model.

If you have 3550(non-XL) inline, then you should not use those config.

It happened to my coworker, he put your exact config on all 3550, the phone and PC start to lose connection once a while.

Hope that help.....

[spatel_64]

Hi,

Your problem looks more likely routing issue, How did your Vlan routing between your native and Voice. If port conf:

interface FastEthernet0/x

switchport access vlan 10: THis will give only access to Vlan 10

switchport trunk encapsulation dot1q

switchport trunk native vlan 3

switchport mode trunk : this sentance once more claim both Native 3 and vlan 10 trunkning on your port.

:

switchport voice vlan 10

spanning-tree portfast

\

Your configuration only be like this:

interface FastEthernet0/x

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk native vlan 3

switchport voice vlan 10

spanning-tree portfast

This will also do the same thing but Your phone will not rebooted frequently.

Make sure your DHCP server has Option 150 set correctly.

Routing on Vlan 2 and Vlan 10 has be static on same router or L3 switches.

Try it.

Thanks

SP

[kiriakos8]

Hallo guys

O.k.

I have WS-C3550-24-PWR / WS-C3524-PWR-XL / WS-C2950C-24 / WS-C2924C-XL access switches and 3 WS-C3550-12G for intervlan routing as distribution-core

that runs HSRP and are DHCP SERVER FOR MY VLANS.

I have apply to all ethernet interfaces of my

access switches the config:

interface FastEthernet0/x

switchport access vlan 10

switchport trunk encapsulation dot1q

switchport trunk native vlan 3

switchport mode trunk

switchport voice vlan 10

spanning-tree portfast

Should i change the config in some models or can i have the same as i have it in all???

If not what config should i apply to some of it and what to all if i can??

Guys i need some help cuz its very havy my problem!!!

Many thanks again for your time and your advice!!!

Xzadio

[kiriakos8]

Hallo guys

O.k.

I have WS-C3550-24-PWR / WS-C3524-PWR-XL / WS-C2950C-24 / WS-C2924C-XL access switches and 3 WS-C3550-12G for intervlan routing as distribution-core

that runs HSRP and are DHCP SERVER FOR MY VLANS.

I have apply to all ethernet interfaces of my

access switches the config:

interface FastEthernet0/x

switchport access vlan 10

switchport trunk encapsulation dot1q

switchport trunk native vlan 3

switchport mode trunk

switchport voice vlan 10

spanning-tree portfast

Should i change the config in some models or can i have the same as i have it in all???

If not what config should i apply to some of it and what to all if i can??

Guys i need some help cuz its very havy my problem!!!

Many thanks again for your time and your advice!!!

Xzadio

[jolo07310]

Ok, here is for XL Model config:

interface FastEthernet0/3

switchport trunk encapsulation dot1q

switchport trunk native vlan 2 -->data vlan

switchport mode trunk

switchport voice vlan 6 --> voice vlan

switchport priority extend cos 0

spanning-tree portfast

For 3550 (24-PWR)

interface FastEthernet0/2

switchport access vlan 2 -->data vlan

switchport mode access

switchport voice vlan 6 -->voice vlan

switchport priority extend cos 0

spanning-tree portfast

Hope thats help...

Ken

[kiriakos8]

Thank you...

I will try your config.

Many thanks for your time.

Xzadio

[jaregalado]

Hi,

I think you must follow the recommended procedures of configuring either a trunk port with voice VLAN or access port with voice VLAN, i.e:

!-- Standard access port with voice VLAN

interface FastEthernet0/x

switchport access vlan 3

switchport voice vlan 10

or

!-- Trunk port with voice VLAN

interface FastEthernet0/x

switchport mode trunk

switchport trunk encapsulation dot1q

switchport trunk native vlan 3

switchport voice vlan 10

First option applies to newer Catalysts like WS-C3550-24-PWR / WS-C2950C, and the second option applies to older Catalysts like WS-C3524-PWR-XL.

WS-C3550 seems to work with any of them. I try sticking to option one whenever possible.

Your current config specifies the port as trunk and then specifies an access VLAN which seems odd to me (trunk ports don't need access VLANs because by definition trunk ports carry every VLAN on the switch).

Also notice on the second option how the native VLAN (or untagged VLAN) must match the VLAN of your PCs.

You don't need no make a complete reconfiguration of all your equipment, you can experiment even with individual ports if you wish.

You can find more information about voice VLAN and 802.1q/p tagging on this link:

http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a008014f377.html

Good luck, and please keep us posted on your findings.

Regards.