MacBook Pro Special Report: Slow networking performance with VLANs; VOIP phones
Several users report an issue where Intel-based Macs exhibit significant data packet loss when connected to networks that also have 802.1q VOIP VLAN devices attached (such as VOIP phones from Cisco and other manufacturers), or when a VLAN setup is used.
Configuring the port for a single VLANs will generally eliminate the problem.
One reader writes:
"On Foundry Networks P4802 switches configured with multiple VLANs on the port (as they have to be if you are doing VoIP and data on the same port) the Intel Mac out of the box, will drop between 10% and 50% of all packets from a continuous ping. Packet sniffing shows that the ping requests are going out and the replies are being sent but the Mac will report packet loss."
Another reader adds:
"The ethernet driver dose not work well on a cisco network with VOIP. If you configure the port to only be on the network LAN and not include the VOIP, the mac works fine."
Index:
- 30" Cinema Display distortion
- Airline, auto power adapter problems
- Audio distortion/poor sound quality
- Apple addressing issues with new revisions?
- Battery Exchange Program
- Battery problems: Shuts off when not connected to power, more
- Built-in Display distortion
- Clock speed of ATI X1600 card -- some units apparently underclocked
- Cooling solutions
- Dead-on-arrival units
- Display slightly bent, not latching properly -- solutions
- Downgraded SuperDrive relative to PowerBook G4
- ExpressCard issues
- FireWire 800 cards for ExpressCard/34 slot on the way
- High-pitched whining noises: Eliminating; Apple acknowledges
- iSight not functioning properly -- fix
- Kernel panics caused by AirPort drivers; Not sleeping properly, still "on" with lid closed
- Kernel panics upon waking up (Inability to wake from sleep)
- Lack of alternative power adapters
- LEAP Networks; cannot connect to
- Loss of speaker capabilities
- Missing components
- Not sleeping properly, still "on" with lid closed
- Notes from service manual
- Poor general network performance
- Printer issues: Not recognized, more
- Problems sharing the Internet connection
- Release notes
- Repeated system freezes or sudden restarts -- checking for bad RAM
- Replaced logic boards have no software serial numbers
- Slow networking performance with VLANs; VOIP phones
- Wireless connectivity issues
organizations do not want to do this kind of thing on a case-by-case basis; and
when it is a Mac-only issue, the willingness to acommodate the problem
probably drops off.
I was lucky enough to have a network admin set my port so that my MacBook
Pro works. But then, I can't move my (portable) computer anywhere else. This is
a significant issue that I hope Apple addresses in the very near term.