rfc7172v2.txt   rfc7172.txt 
skipping to change at page 18, line 24 skipping to change at page 18, line 24
FGL-safe. FGL-safe.
1. For both unicast and multi-destination data, RB1 MUST NOT forward 1. For both unicast and multi-destination data, RB1 MUST NOT forward
an FGL packet to a VL neighbor RB2. This is accomplished as an FGL packet to a VL neighbor RB2. This is accomplished as
specified in Section 5.1. specified in Section 5.1.
2. For both unicast and multi-destination data, RB1 MUST NOT egress a 2. For both unicast and multi-destination data, RB1 MUST NOT egress a
packet onto a link that does not belong in that FGL. packet onto a link that does not belong in that FGL.
3. For unicast data, RB1 must forward the FGL packet properly to the 3. For unicast data, RB1 must forward the FGL packet properly to the
egress nickname in the TRILL header. This means that it MUST NOT egress nickname in the TRILL Header. This means that it MUST NOT
delete the packet because of not having the expected VLAN tag, it delete the packet because of not having the expected VLAN tag, it
MUST NOT insert a VLAN tag, and it MUST NOT misclassify a flow so MUST NOT insert a VLAN tag, and it MUST NOT misclassify a flow so
as to persistently misorder packets, because the TRILL fields are as to persistently misorder packets, because the TRILL fields are
now 4 bytes longer than in VL TRILL packets. now 4 bytes longer than in VL TRILL packets.
4. For multi-destination data, RB1 must forward the packet properly 4. For multi-destination data, RB1 must forward the packet properly
along the specified tree. This means that RB1 MUST NOT falsely along the specified tree. This means that RB1 MUST NOT falsely
prune the packet. RB1 is allowed not to prune at all, but it MUST prune the packet. RB1 is allowed not to prune at all, but it MUST
NOT prevent an FGL packet from reaching all the links with that NOT prevent an FGL packet from reaching all the links with that
FGL by incorrectly refusing to forward the FGL packet along a FGL by incorrectly refusing to forward the FGL packet along a
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