Redirect message
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... IP datagrams it originates. Sections 6 and 7
describe the ICMP Destination Unreachable and Redirect messages and
how TOS affects path choice by both hosts ...
... TOS
facility affects the origination and interpretation of ICMP Redirect
messages and certain types of ICMP Destination Unreachable messages.
This memo does not define any new extensions to the ICMP ...