A Mark, a Buck, a Frank or a
Yen?
• Correct model for ECN setting for multicast
packet?
• IP Level (ECN bis)
– ECN is set (typically) by RED (c..f AF work by
Dina Papagiannaki at UCL/Sprint..)
– Equivalent for Multicast is to set ECN at router
at ingress to congested link, then:
– randomly select which branch to forward the
packet with ECN (i.e. clear for all other
branches)