[cisco-voip] Switch port configs

[Cristobal Priego]

while talking about the 3550s
I have a weird issue
I have a 7961G-GE and a 7962 that won't work if i plug them in to the 3550,
however if I plug them in to a 3560 they work pretty well

any ideas of why this could be happening ?

I upgraded the ios to the latest available. but i just can't get this 2
phones to properly work and register to my ucm

thanks

2010/10/11 Jason Aarons (US) <jason.aarons at us.didata.com>

> Third party phones can use LLDP-MED.  Avaya phones can get the voice vlan
> via dhcp on the data vlan and reboot into voice vlan.  You should always
> avoid having end user ports being trunks, by default trunk mode would pass
> all vlans into the phone, creates potential spanning tree issues, etc.
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [mailto:
> cisco-voip-bounces at puck.nether.net] *On Behalf Of *Shine Joseph
> *Sent:* Monday, October 11, 2010 5:41 PM
> *To:* Scott Voll; cisco-voip at puck.nether.net
> *Subject:* Re: [cisco-voip] Switch port configs
>
>
>
> If you are connecting a non-Cisco IP phone to a switch, you will need to
> configure the port as trunk. As Cisco phones/switches uses CDP to work out
> voice VLAN trunk configuration is not required, though it works well. Due to
> the management overhead and the security concerns this configuration is not
> recommended.
>
>
>
> When configured with the second option, the switch port gets configured as
> trunk, internally, but allows only two VLANs - Voice VLAN and the access
> VLAN.
>
>
>
> HTH
>
>
>
> Cheers,
>
> Shine
>
>
>
>
>
> e the port as
>
> *From:* Scott Voll <svoll.voip at gmail.com>
>
> *Sent:* Tuesday, October 12, 2010 1:10 AM
>
> *To:* cisco-voip at puck.nether.net
>
> *Subject:* [cisco-voip] Switch port configs
>
>
>
> is there anything wrong with having your switch ports configured as
> follows?
>
>
>
>  switchport trunk encapsulation dot1q
>
>  switchport trunk native vlan 14
>
>  switchport mode trunk
>
>  switchport voice vlan 146
>
>
>
> Normally I would have them set like:
>
>
>
> switchport access vlan 14
>
> switchport voice vlan 146
>
>
>
> These are 3560's running 12.2 code.
>
>
>
> TIA
>
>
>
> Scott
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