1. PW-CE2 E
PWE3 – 58th IETF
10 November 2003
Yaakov (J) Stein

2. PW-PE2-E PW CE CE IWF PE PE IWF PSN
In standard PWE “Edge to Edge” means “PE to PE” PW CE
native
service
native
service CE
IWF PE PE
IWF
attachment
circuit
attachment
circuit
PSN

3. PW-CE2-E PW CE IWF PE PE IWF CE PSN
Alternatively “Edge to Edge” could mean “CE to CE” PW CE
IWF PE PE
IWF CE
attachment
circuit
PSN
attachment
circuit

4. Pros & Cons PW-PE2-E migration to PW doesn’t require customer upgrade
single (large) IWF serves multiple customers
service provider responsible for IWF
PW-CE2-E
Ethernet access may be cheaper
easier to provide many different services
customer responsible for IWF
suitable for enterprise scenarios

5. Questions PWE3 Charter states does this rule out PW-CE2-E ?
Service providers are seeking to offer multiple services across a common packet switched network …
From the customer perspective, the pseudo wire is perceived as an unshared link … of the chosen service
does this rule out PW-CE2-E ?
if so, can we fix it when we re-charter?
PWE3 architecture draft figure 2 (PWE3 Network Reference Model)
is specifically PW-PE2-E
do we want to modify this ?
do we want to define 2 scenarios?