/usr/share/wireshark/radius/dictionary.mikrotik is in libwireshark-data 1.8.2-5wheezy18.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | # -*- text -*-
#	http://www.mikrotik.com
#
#	http://www.mikrotik.com/documentation//manual_2.9/dictionary
#
#	Do NOT follow their instructions and replace the dictionary
#	in /etc/raddb with the one that they supply.  It is NOT necessary.
#
#	On top of that, the sample dictionary file they provide
#	DOES NOT WORK.  Do NOT use it.
#
#	$Id: dictionary.mikrotik 28996 2009-07-07 17:52:03Z wmeier $
#
VENDOR		Mikrotik			14988
BEGIN-VENDOR	Mikrotik
ATTRIBUTE	Mikrotik-Recv-Limit			1	integer
ATTRIBUTE	Mikrotik-Xmit-Limit			2	integer
# this attribute is unused
ATTRIBUTE	Mikrotik-Group				3	string
ATTRIBUTE	Mikrotik-Wireless-Forward		4	integer
ATTRIBUTE	Mikrotik-Wireless-Skip-Dot1x		5	integer
ATTRIBUTE	Mikrotik-Wireless-Enc-Algo		6	integer
ATTRIBUTE	Mikrotik-Wireless-Enc-Key		7	string
ATTRIBUTE	Mikrotik-Rate-Limit			8	string
ATTRIBUTE	Mikrotik-Realm				9	string
ATTRIBUTE	Mikrotik-Host-IP			10	ipaddr
ATTRIBUTE	Mikrotik-Mark-Id			11	string
ATTRIBUTE	Mikrotik-Advertise-URL			12	string
ATTRIBUTE	Mikrotik-Advertise-Interval		13	integer
ATTRIBUTE	Mikrotik-Recv-Limit-Gigawords		14	integer
ATTRIBUTE	Mikrotik-Xmit-Limit-Gigawords		15	integer
# MikroTik Values
VALUE	Mikrotik-Wireless-Enc-Algo	No-encryption		0
VALUE	Mikrotik-Wireless-Enc-Algo	40-bit-WEP		1
VALUE	Mikrotik-Wireless-Enc-Algo	104-bit-WEP		2
END-VENDOR	Mikrotik
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