Pierre,
The media filter is not the MAU. The interface on a Cisco 25xx router is a
DB15. It is use to connect to a type 1 MAU. If you are using a RJ45 MAU
(most people are, it is a lot smaller), you will need a media filer. If
your router is a 2612, you will not need a media filter and just use a cat5
RJ45.
Albert
-----Original Message-----
From: Pierre-Alex [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 06, 2001 6:46 PM
To: Albert Ip; [EMAIL PROTECTED]
Subject: RE: Token Ring
Thank you Albert, and I presume the media filter is the MAU?
-----Original Message-----
From: Albert Ip [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 06, 2001 8:43 PM
To: 'Pierre-Alex'; [EMAIL PROTECTED]
Subject: RE: Token Ring
Token Ring and Ethernet does not operate on the same principles as Ethernet.
Ethernet uses Carrier Sense Multiple Access/ Collision Detection (CSMA/CD).
Token Ring uses token passing. Ethernet will send the packet out and detect
if there is a collision. Token Ring will not send out the information
unless it can insert the information in a empty frame (token). In an
Ethernet network, if the information is not for that host, the host will
discard the information. In a Token Ring network, if the information is not
for that host, the host will past the frame onto the next host. There is
never a collision in a Token Ring network. That is why you must have a MAU
in a Token Ring Network.
In the physical level, the roll/crossover cable will not work because the
interface does not operation at the same ohms. I presume you used a
DB15/RJ45 converter to connect to the router then use a roll cable to
connect to the NIC. You must use a media filter to connect to the router to
use the RJ45 connector on the NIC.
There is alot more difference between Ethernet and Token Ring. And believe
it or not, there is still alot of Token Ring out there. Also, you will have
to know all this to pass the CCIE exams.
Albert
-----Original Message-----
From: Pierre-Alex [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 06, 2001 5:11 PM
To: [EMAIL PROTECTED]
Subject: Token Ring
Pierre-Alex,
I am not 100% sure but I don't see why you can't roll the cable. I have
always had a mau involved but token ring operates on the same principles as
Ethernet as transmit and receive go. I am starting to doubt myself. Why
don't you post to the ccie news group and see what the consensus is.
Matthew
-=-=-=-=-=-=-=-=-=-
Matthew Herman
Vice President
GoOn-Line.com
530.891.4100
530.896.8242 (fax)
[EMAIL PROTECTED]
-----Original Message-----
From: Pierre-Alex [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 06, 2001 4:59 PM
To: Matthew Herman
Subject: RE: Free Token ring NIC cards
No problem!
Quick Question: can I connect a PC (with a token ring nic) directly to the
router token ring interface or
do I need a MASU even for one machine?
Pierre-Alex
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