Hi,

We are having a hard-time trying to produce a viable upgrade path for
the recent 2960 fixes we implemented.

Context:
We discovered recently that recent 2960 firmware 12.2(52)SE+ don't work
well when used in Port-Security with Voice over IP (VoIP) with PacketFence.

Since recent switches come with a bootloader that's more recent than
12.2(52) asking people to downgrade (like we did in the past) is no
longer an option.

We tried our best to find a fixed IOS or a fix for our own module that
didn't involve configuration changes but we couldn't.

So far the fix is quite painful:
- module changes
- configuration changes
- IOS update (if you were pre-12.2(52))

The 'PF' workaround:
In a nutshell, we are treating VoIP devices like a normal device except
that it belongs to the Voice VLAN. Previously we were doing dynamic
port-security on these devices and relying on CDP to appropriately
detect the Voice nature of the device.

Config changes are:
- add a maximum 1 vlan voice
- set a fake VoIP MAC on vlan voice
On each VoIP enabled port for each switch.

If you have *any* ideas at this point they will be appreciated! We don't
want to force an IOS upgrade, PacketFence update and switch
configuration change to keep things running as they were but it looks
like there's no way to work-around Cisco's changes this time...

-- 
Olivier Bilodeau
obilod...@inverse.ca  ::  +1.514.447.4918 *115  ::  www.inverse.ca
Inverse inc. :: Leaders behind SOGo (www.sogo.nu) and PacketFence
(www.packetfence.org)

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