8.2.138 Source IP Address
29.2443GPPInterface between the Control Plane and the User Plane nodesRelease 17TS
The Source IP Address IE type shall be encoded as shown in Figure 8.2.138-1
|
Bits |
||||||||||
|
Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
||
|
1 to 2 |
Type = 192 (decimal) |
|||||||||
|
3 to 4 |
Length = n |
|||||||||
|
5 |
Spare |
MPL |
V4 |
V6 |
||||||
|
m to (m+3) |
IPv4 address |
|||||||||
|
p to (p+15) |
IPv6 address |
|||||||||
|
q |
mask/prefix length |
|||||||||
|
k to (n+4) |
These octet(s) is/are present only if explicitly specified |
|||||||||
Figure 8.2.138-1: Source IP Address
The following flags are coded within Octet 5:
– Bit 1 – V6: If this bit is set to "1", then the IPv6 address field shall be present, otherwise the IPv6 address field shall not be present.
– Bit 2 – V4: If this bit is set to "1", then the IPv4 address field shall be present, otherwise the IPv4 address field shall not be present.
– Bit 3 – Mask/Prefix Length: If this bit is set to "1", then the mask (for IPv4) / prefix (for IPv6) length field shall be present, otherwise this field shall not be present.
– Bit 4 to 8 Spare, for future use and set to "0".
Octets "m to (m+3)", "p to (p+15)" (IPv4 address / IPv6 address fields), if present, shall contain the address value.
The mask/prefix length field, if present, shall be encoded as a 8 bits binary integer.
EXAMPLE 1: this field encodes the value 24 for the IPv4 subnet 192.0.2.10/24.
EXAMPLE 2: this field encodes the value 64 for the /64 IPv6 prefix.