Avaya PSN 642U User Manual

PSN #

Name of problem Products affected

PSN000642u

Network cards and 802.1Q VLAN tags in packet capture

Publication date

Severity/risk level

30-Mar-2006 Medium

Issue #

Urgency When convenient

Issue date

1-Feb-2006

4600 Series IP Telephones - All versions - all releases

Problem description

Some Broadcom and Intel Network cards DO NOT show any 802.1Q VLAN tags in packet capture (e.g. Ethereal): e.g Broadcom 570x Gigabit integrated adapter (Dell Laptop) Driver 8.48.0.0 Date 10/31/05

Intel PRO/1000 MT Mobile Connection (IBM T41 Laptop) Driver 8.6.11.0 date 6/29/2005

Broadcom NetXtreme 57xx Gigabit Controller (Dell Desktop) Driver 8.48.0.0 Date 10/31/05

Following Network cards DO show 802.1Q VLAN tags in packet capture:

3Com 10/100 mini PCI Ethernet adapter (Dell Laptop) Driver 1.21.0.1 Date 7/21/2001

3Com Megahertz Model 3CXFE575BT (PCMCIA Card) Driver 2.60.500.20

3Com EtherLink 10/100 PCI TX NIC 3C905B-TX (PCI Card) Driver 4.31.0.0 Date 8/13/2002

Resolution

Workaround or alternative remediation

For Intel Cards, look at Intel Support site:

http://support.intel.com/support/network/sb/CS-005897.htm

For Broadcom Cards: First update driver to latest version.

There is a registry key under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet that can be set to cause the driver and chip not to strip the 802.1Q headers.

In order to set that key, you need to find the right instance of the driver in Registry Editor and set that key for it. You can do this by doing following:

1. Run the Registry Editor (regedt32).

2. Search for "TxCoalescingTicks" under "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet" and ensure this is the only instance that you have.

3. Right-click on the instance number (eg. 0008) and add a new string value.

4. Enter "PreserveVlanInfoInRxPacket" and give it the value "1".

Save and Reboot

This should set you up to be able to sniff the VLAN tag information.

Remarks

Patch Notes

The information in this section concerns the patch, if any, recommended in the Resolution above.

Backup before applying the patch

n/a

Download

n/a

Patch install instructions Service-interrupting?

n/a No

Verification

n/a

Failure

n/a

Patch uninstall instructions

n/a

Security Notes

The information in this section concerns the security risk, if any, represented by the topic of this PSN.

Security risks

n/a

Avaya Security Vulnerability Classification

Not Susceptible

Mitigation

n/a

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