https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6445
Bill Meier <wmeier@xxxxxxxxxxx> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #1 from Bill Meier <wmeier@xxxxxxxxxxx> 2011-11-10 16:42:17 EST ---
> From protocol Display Filter Reference: CFM EOAM 802.1ag/ITU Protocol
> http://www.wireshark.org/docs/dfref/c/cfm.html
>
> cfm.maid.ma.name String Short MA Name 1.0.0 to 1.6.2 (Should be fixed 48 Bytes)
> cfm.maid.ma.name.format Unsigned 8-bit integer Short MA Name (MEG ID) Format
> 1.0.0 to 1.6.2 (No such field in Y.1731 or 802.1ag)
> cfm.maid.ma.name.length Unsigned 8-bit integer Short MA Name (MEG ID) Length
> 1.0.0 to 1.6.2 (No such field in Y.1731 or 802.1ag)
1. Actually: it appears to me that your statements above are incorrect with
respect to "should be ..." and "no such field".
From section 21.6.5 of the 802.1ag standard:
"21.6.5 Maintenance Association Identifier
(48 octets) This field contains the MAID of the transmitting MEP. It is
divided into six subfields, plus, if
necessary, a pad of octets contains 0 to fill out its fixed length. The
subfields are:
a) Maintenance Domain Name Format (21.6.5.1);
b) Maintenance Domain Name Length (21.6.5.2);
c) Maintenance Domain Name (21.6.5.3);
d) Short MA Name Format (21.6.5.4);
e) Short MA Name Length (21.6.5.5); and
f) Short MA Name (21.6.5.5).
..."
2. According to the standard, the MAIDs in the cfm ccm packets in the attached
pcap file are, in fact, not valid.
Also: The ethernet MAC addresses appear to be "made-up" addresses:
00:...:12:34 and 00:...:43:21.
How was this capture created ?
See the capture file attached to Bug #5517 for valid CFM CCM messages which
contain MAIDs which conform to the 802.1ag standard.
I'm marking this bug as "invalid". If I've missed something you can reopen the
bug.
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