Ethereal-users: Re: [Ethereal-users] Can not see any FC frames

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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Mon, 09 Oct 2006 22:27:36 -0700
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Logen Song wrote:

The ethernet ports on the PAA and the machine running the ethereal are connected to the same hub. It sees all the IP packets,

Are those IP packets from machines *other* than the machine running Ethereal and *to* machines other than the machine running Ethereal (i.e., traffic that's not being sent by or sent to the machine running Ethereal), and not broadcast or multicast packets?

What type of hub is it?

but not the FC packets...any clues?

Does it see any packets with an Ethernet type field value of 0?

If so, try turning the "Decode as MDS Header if Ethertype == 0" preference on for the "MDS Header" protocol.

If not, ask Cisco what Ethernet type the PAA uses for the FC packets. If it's not 0xFCFC and not 0, Wireshark needs to be changed to support that additional Ethernet type. If it's 0, it might be that the Ethernet adapter on the machine running Ethereal, or the driver for that Ethernet adapter, or the rest of the networking stack, might discard frames with an Ethernet type of 0. What OS are you running on the machine running Ethereal?
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