Re: AVAYA IP telephones Over Cisco Switches

Marc,
I was wondreing - How this vlan switchover is working?
AFAIK, DHCP server can't do this kind of tricks! i.e. downloading on vlan x
and then after reboot on vlan Y.

On Sun, Jan 8, 2012 at 5:12 AM, marc edwards <renorider_at_gmail.com> wrote:

> I work in a Cisco network Avaya call center environment. We use
>
> no cdp enable
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport trunk allowed vlans Data , Voice
>
> some times I see the native VLAN set to the data VLAN but above is enough.
> We have to throw in DHCP options for phones for first boot up; they pull
> boot file with information about data, voice VLANS. Phone resets as a
> switch trunking both voice for hand set and possibly Data for a PC jacked
> into it.
>
>
> On Sat, Jan 7, 2012 at 2:39 AM, Karim Jamali <karim.jamali_at_gmail.com>
> wrote:
>
> > Dear Mahmood,
> >
> > You should use LLDP-MED as this is the standard. There is an IOS version
> > that supports it..Once this is done, the switch should be able to inform
> > the phone on the voice vlan to use..
> >
> > There is one workaround which is to boot the phone and by default it will
> > take from the data(untagged scope) and through DHCP server you can
> enforce
> > a VLAN causing the phone to request an address from the voice scope
> > (tagged) however the phone will be booting twice.
> >
> > HTH
> >
> > Thanks
> > On Jan 7, 2012 1:04 PM, "Mahmoud Nossair" <mahmoud.nossair_at_gmail.com>
> > wrote:
> >
> >
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> >
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Received on Mon Jan 09 2012 - 22:21:50 ART