Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 329)

Multi-Service IronWare Switching Configuration Guide 299
53-1003036-02
802.1ag over PBB OAM
11
Configuration scenarios
Within a PBBN (see Figure 49 ), the encapsulation performed by Provider Instance Ports (PIPs) also
encapsulates CFM frames sourced by customers attached to Customer Network Ports (CNPs). The
encapsulation of S-VLAN and C-VLAN CFM frames hides them from the PBBN. All eight levels of
CFM frames generated in customer networks are carried over the backbone as encapsulated data
and may be used by customer networks.
FIGURE 50 Backbone Edge Bridge Operation
Figure 51 describes the four types of Maintenance Associations (MA) defined by IEEE 802.1ag
CFM.
• A full set of eight MD levels exists within each PBBN for use by I-SIDs MAs.
• A full set of eight maintenance levels exists within each PBBN for use by B-VLAN CFM frames.
• An additional eight maintenance levels exists for the LAN link segments.