A string of octets containing one bit per TrBRF in the management
domain. The first octet corresponds to TrBRFs with
ciscoTsTrBRFInfoTrBRFNumber 1 through 8; the second octet to
TrBRFs 9 through 16; etc. The most significant bit of each octet
corresponds to the lowest value ciscoTsTrBRFInfoTrBRFNumber in
that octet. If the bit correspond to a TrBRF is set to '1', then
the TrBRF is a transited configured TrBRF on the local device.
(Default TrBRFs which must transit the local device are
always considered to be 'transited configured TrBRFs'.) Any
attempt to: set a bit string which has more bits set than the
local device can transit; or does not have all bits set
corresponding to default TrBRFs which must transit the device;
or set any bits corresponding to non-existant TrBRFs (TrBRFs
whose IDs are not defined in the management domain) will be
rejected with a 'badValue' error.