Figure 39: Access Port Ingress Packet Format And Lookup; Figure 40: Network Port Egress Packet Format And Flooding - Alcatel-Lucent 7210 SAS M Service Manual

b. 7210-A learns the source MAC address in the packet and creates an entry in the FIB table
c. The destination MAC address in the packet is looked up in the FIB table for the VPLS in-
d. If the destination MAC address has already been learned by 7210, an existing entry in the
e. The customer packet is sent on this uplink SAP once the IEEE 802.1Q tag is stripped and
f.
2. Core Router Switching
7210 SAS M Services Guide
Customer
Location A
7210-A
Dest Src VLAN
MAC MAC ID
Customer Payload

Figure 39: Access Port Ingress Packet Format and Lookup

that associates the MAC address to the service access point (SAP) on which it was re-
ceived.
stance. There are two possibilities: either the destination MAC address has already been
learned (known MAC address) or the destination MAC address is not yet learned (unknown
MAC address).
For a Known MAC Address
FIB table identifies destination uplink QinQ SAP to be used for sending the packet towards
the PE-Router-A.
the uplink SAP tag is added to the packet.
For an Unknown MAC Address
If the destination MAC address has not been learned, 7210 will flood the packet to all the
uplink SAPsspoke SDPs that are participating in the service .
Customer
Location C
7210-C
Uplink Q-tags
DST SRC
MAC MAC

Figure 40: Network Port Egress Packet Format and Flooding

PE A
IP/MPLS Network
Payload
(Figure 37):
(Figure 37):
PE C
Customer
Q-tag Q-tag
Packet
1 2
Virtual Private LAN Services
OSSG-7210M
Page 249