Customer Edge Switching: A Security Framework for 5G 215
the first packet of the data connection (i.e. TCP SYN segment). Figure 9.7 presents the
impact of the delay caused by the CETP policy negotiation on setting up of the data
connection. The evaluation includes the delay introduced by the separation of control
and data plane realized in the local test network, where the CETP signalling can either
complete in 1 or 2 RTT, depending on the policies in use. However, due to zero‐latency
of the simulation links, we will have to add the RTT delays of a real network to obtain
the actual connection setup delay.
220
200
180
160
140
120
Delay (msec)
Delay (msec)
100
80
60
0
1RTTe
1RTTr
2RTTe
2RTTr
20
40
60
80
100
120
140
160
180
200
0
2 0
4 0
6 0
8 0
Data
DNS
Sequence
(b)
(a)
100
120
1RTT
2RTT
140
Figure 9.7 CETP Connection setup delay.