Cisco ASR 5000 Series Administration Manual page 46

▀ How the Serving Gateway Works
Figure 6.
U E
A tta c h R e q
1
4
R a d io B e a re r
E s t R e q
R a d io B e a re r
1 8
E s t R s p
▄ Cisco ASR 5000 Series Serving Gateway Administration Guide
Subscriber-initiated Attach (initial) Call Flow
e N o d e B M M E
A tta c h R e q
2
Id e n tity R e q
3
Id e n tity R s p
6
8
1 0
C re a te D e fa u lt
B e a re r R s p
A tta c h
1 6
A c c e p t
1 7
A tta c h
1 9
C o m p le te
U p lin k D a ta
2 0
2 1
B e a re r R s p
s t
1 D o w n lin k D a ta
2 4
S -G W
A u th e n tic a tio n /S e c u rity /M E Id e n tity
5
U p d a te L o c a tio n
In s e rt S u b s c rib e r D a ta
In s e rt S u b s c rib e r D a ta A c k
U p d a te L o c a tio n A c k
C re a te D e fa u lt
B e a re r R e q
C re a te D e fa u lt
1 1
B e a re r R e q
C re a te D e fa u lt
B e a re r R s p
1 5
U p d a te
B e a re r R e q
U p d a te
2 2
2 3
U p d a te L o c a tio n R e q
U p d a te L o c a tio n R s p
D a ta
2 6
P -G W P C R F
P C R F
1 2
In te ra c tio n s
1 3
s t
1 D o w n lin k D a ta
Serving Gateway Overview
H S S
7
9
P D N
1 4
P D N
2 5
P D N
OL-22986-01