Microsoft KB Archive/164677

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XIRCOM CreditCard Ethernet Adapter IIps Not Support IP Multicast

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Q164677

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The information in this article applies to:


 * Microsoft NetShow

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SYMPTOMS
Some XIRCOM CreditCard Ethernet Adapter IIps (CE2) PCMCIA network adapter drivers may not support IP Multicast. The original release of drivers for this device do not support IP Multicasting.

When you try to use NetShow 1.0 to receive Live Audio or File transfers that uses IP Multicast Only (UDP), you may not hear any audio or fail to receive the file transfer even though the Server is functioning normally for other clients.

In version 2.0, you also may not be able to receive Multicasts. This may not be apparent if the NetShow stream is set to fail over to a Unicast (TCP) stream.

WORKAROUND
There are a couple of ways to determine if you may have this problem:


 * If your XIRCOM IIps adapter has a gold stripe across the top of the adapter, you have an older model and may need to get newer drivers from XIRCOM. If it has a black strip across the top, you have a newer model, and it should support IP Multicast.
 * If you are using Microsoft Windows 95 and using the original vendor-provided driver, you will need to get a newer driver. The driver is dated 7/11/95 and named Ce2ndis3.vxd. If you check the name of the driver under Network Properties, the driver that supports IP Multicast has the following name: Xircom CE-IIps CreditCard Ethernet Adapter (XPS driver)
 * In NetShow version 2.0, you can check the stream type by doing the following: 1. Play a NetShow stream. 2. While the stream is playing, right-click the Control Bar of the Player Control, and click Properties. 3. Select the Details tab and look at the SourceLink. If it is using an MMS: broadcast, then you are receiving the stream via Unicast (TCP). If this source line property indicates Multicast, you have updated drivers that support IP Multicasting.

NOTE: Just because the SourceLink is using an Unicast (MMS:) stream does not indicate you have a problem. The server can be set to only stream Unicast streams. You need to verify that the stream is set to multicast either at the server or with another client using a different network adapter.

MORE INFORMATION
You can contact XIRCOM in the following ways:

NOTE: When this article was written, the new driver was version 2.30, dated 8/26/96, and named Ce2drv.exe.


 * Use their Internet site to download the latest drivers for the IIps adampter at WWW.XIRCOM.COM
 * Call Xircom USA Customer Support: Telephone: 1 (805) 376-9200 Fax to Tech Support: 1 (805) 376-9100 BBS: 1 (805) 376-9130 Instructions for BBS Access BBS - TechLine Tech Support Database: 1 (805) 375-7202 FactsLine (faxback system) U.S.A only.: 1 (800) 775-0400 FactsLine USA/International.: +1 (805) 376-9020 World Wide Web: http://www.xircom.com FTP server: ftp.xircom.com

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