Understanding Selection of Policy-Control Properties for an IP-based TDF Subscriber
As part of the traffic detection function (TDF) subscriber session creation, the subscriber is assigned a policy and charging enforcement function (PCEF) profile, which specifies how policy and charging control (PCC) rules are defined on the TDF.
If every IP-based subscriber assigned to a TDF domain can share
the same PCEF profile, then the PCEF profile can be specified within
the TDF domain, under the [edit unified-edge gateways tdf gateway-name domains] hierarchy level. (For IFL-based
subscribers, the PCEF profile must be specified
within the TDF domain.)
If all of the IP-based subscribers assigned to the same TDF
domain cannot share the same PCEF profile, the TDF domain does not
specify a PCEF profile, and the PCEF profile selection must be configured
under the [edit unified-edge gateways tdf gateway-name domain-selection term] hierarchy level. The domain-selection
term consists of a from and a then statement.
The from statement identifies the match conditions
for the subscriber. This includes the RADIUS client (GGSN, PGW, or
BNG) that is sending the accounting start request for the subscriber
and the values for particular AVPs in the message.
The then statement identifies the PCEF profile to
assign to the subscriber. The then statement can also include
the name of the TDF domain to assign to the subscriber. If the then statement only includes the PCEF profile, then another domain-selection term must assign a TDF domain to the subscriber.
When both a PCEF profile and a TDF domain are assigned to a
subscriber in a domain-selection term statement, that PCEF
profile is used even if the TDF domain specifies another PCEF profile.
Example: The TDF domain domain1 specifies a PCEF
profile. The domain-selection term does not need to specify
a PCEF profile.
[edit unified-edge gateways tdf tdf1]
domain-selection {
term 1 {
from {
client {
client1;
}
user-name matches carrierA
}
then {
domain domain1;
}
}
}
Example: The TDF domain domain2 does not specify
a PCEF profile. A domain-selection term must specify a
PCEF profile. In this example, the PCEF profile is specified in the
same term as the TDF domain.
[edit unified-edge gateways tdf tdf1]
domain-selection {
term 1 {
from {
framed-ip-address equals 192.0.2.1/32
}
then {
domain domain2;
pcef-profile pcef3;
}
}
}
Example: The TDF domain domain2 does not specify
a PCEF profile. A domain-selection term must specify a
PCEF profile. In this example, only the first term selects the TDF
domain, so other terms must be added to select the PCEF profile.
[edit unified-edge gateways tdf tdf1]
domain-selection {
term 1 {
from {
client {
client2;
}
user-name matches carrierB
}
then {
domain domain2;
}
}
term 2 {
from {
framed-ip-address equals 192.0.2.1/32
}
then {
pcef-profile pcef3;
}
}
term 3{
from {
framed-ip-address equals 198.51.100.2/32
}
then {
pcef-profile pcef4;
}
}
}