Configuration Guide

Table Of Contents
©2021 Extreme Networks, Inc. All rights reserved
October 2021
20
Services Node Node Node Node
IP Shortcuts
Data C-MAC
Data B-MAC
L2VSN
Data C-MAC ISID B-MAC
L3VPN
Data IP *C-MAC ISID B-MAC
*C-MAC header
is NULL
Edge
SPB
MAC corresponding to the destination SPB node across the backbone where the service traffic will get
de-capsulated. The encapsulation used is shown in Figure 1. As such, the nodes within the SPB backbone
will have no knowledge of the addresses used within the service VSNs (C-MACs or IP addresses)
transported across and only need to provide reachability to the B-MAC addresses within the backbone.
Data IP C-MAC
Figure 1: SPBM Service Type Encapsulations
Connectivity Fault Management
Connectivity Fault Management (CFM) offers loopbacks and link trace for troubleshooting, and continuity
checks for fast fault detection. Presently only the loopback and link trace features of CFM are supported.
These commands allow operators, service providers and customers to verify the connectivity that they
provide or utilize and to debug systems. This is accomplished through:
Loopback messaging to an intermediate or endpoint within a domain for the purpose of fault
verification. (LBM)
Linktrace messaging to a maintenance endpoint with intermediate points responding to indicate
the path of the traffic within a domain for the purpose of fault isolation. (LTM)
End-point provisioning
The boundary between the MACinMAC SPB domain and 802.1Q domain is handled by the Backbone Edge
Bridges (BEBs). At the BEBs, VLANs or VRFs are mapped into ISIDs based on the local service
provisioning.
Services (whether L2 or L3 VSNs) only need to be configured at the edge of the SPB backbone (on the
BEBs). There is no provisioning needed on the core SPB nodes. This provides a robust carrier grade
architecture where configuration on the core nodes never needs to be touched when adding new services.
Service provisioning simplicity
The same simplicity extends to provisioning the services to run above the SPB backbone. Creating an
L2VSN is as simple as associating an ISID number with an edge VLAN; creating an L3VSN is as simple as
associating an ISID number with a VRF and configuring the desired IS-IS IP route redistribution within the
newly created L3VSN.
Data C-MAC