Installation and Operation Manual
Appendix
E Encapsulation over PSN
ACE-3105, ACE-3205 Ver. 5.2
2BEncapsulation over Different PSN Types
E-7
PHP Enabled – Data Packet
DA
SA
Type
8100
VLAN
tag
Type
8847
PW
label
Control
Word
Payload
Figure
E-8. MPLS Data Packet when PHP is Enabled
Table
E-7. Encapsulation Parameters
Parameter Name
Purpose
DA
Destination MAC address of the remote
peer or next hop unit. 6 bytes long.
SA
MAC address of the device. 6 bytes long.
Type 8100
If VLAN support is enabled, the Ethernet
packet type is set to 0x8100 . 2 bytes long.
VLAN tag
If VLAN support is enabled, this tag includes
the VLAN ID and its priority; configured per
PW. 2 bytes long.
Type 8847
MPLS packet type – 0x8847. 2 bytes long.
PW label
Label of the Pseudowire; manually defined
per PW and per direction, or dynamically
learned using LDP. 4 bytes long.
Control Word
Contains the sequence number and control
bits. Optional for some PW types. 4 bytes
long.
Payload
The service data carried on the frame,
depending on the PW type.
UDP over IP Packet Format
The following figure illustrates the UDP over IP encapsulation format:
DA
SA
Type
8100
VLAN
tag
Type
800
IP
header
UDP
header
Control
Word
Payload
Figure
E-9. UDP over IP Encapsulation Format
Table
E-8. UDP over IP Encapsulation Parameters
Parameter Name
Purpose
DA
Destination MAC address of the remote
peer or next hop unit. 6 bytes long.
SA
MAC address of the device. 6 bytes long.
Optional