A node that receives an IF_ID object
SHOULD
check whether the
information carried in this object is
consistent
with the
information carried in a received ERO, and if not it
MUST
send a PathErr
Message with the error code "Routing Error" and
error
value of "Bad
Explicit Route Object" toward the sender. This
check
CANNOT be performed
when the initial ERO subobject is not the
incoming
interface.
However, an LSR receiving a path message
with an ero processes it as follows: if the LSR is a part of the node
specified by the first subobject, it selects a hop, then *removes* that
subobject. In other words, the ERO does not contain information about the
route to get to that LSR, this information is in the RRO.
This may be a minor point, but
I want to make sure that I understand it properly. Shouldn't the text above
say:
A node
that receives an IF_ID object SHOULD
check whether the information
carried in this object is consistent
with the information carried in
a received **RRO**, and if not it
MUST
send a PathErr Message with the
error code "Routing Error" and error
value of "Bad Explicit Route
Object" toward the sender. This
check
CANNOT be performed when the
initial **RRO**
subobject is not the
incoming
interface.