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[Bier] Comment on BIER-TE

<hu.fangwei@zte.com.cn> Wed, 02 August 2017 03:39 UTC

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Subject: [Bier] Comment on BIER-TE
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Hi,athors of BIER-TE

I have a comment on BIRE-TE.


BitPositions are assigned to adjacencies in the BIER-TE architecture instead of BFER in BIER, so it is necessary to have SI in the BIER-TE domain to reduce the Bitstring length.  The issues is that if the transmit adjacency for a  BIER-node doesn't have the given SI value for a BIER-TE packet(the BitString in BIER encapsulation is related to SubDomain,BSL and SI combination), the BIER-TE packet may be dropped in that BIER-node.

The BIER-TE packet(SI =1 ) will be dropped in the BFR2 in the following figure, for there is no SI=1 entry in the BFR2 BIFT table.  How to solve it? Thanks.









Regards.

Fangwei.

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