Design Reference

Table Of Contents
Figure 9: VSP 4000 as an edge router
SLPP PDUs are generated by VSP 4000. If there is a loop, the SLPP PDUs return to port 1/1. After
the threshold value is reached, SLPP shuts the ports down.
Scenario 2: VSP 4000 as an edge router but with an additional link to the ERS 8800
Scenario 2 is similar to scenario 1 except that there is an additional link from ERS 8800 to VSP
4000 that is not part of MLT 1. The additional link is a member of the SLPP-enabled VLAN, and
does not have to be directly connected from ERS 8800 to VSP 4000, but can be connected from
other devices interconnected to the ERS 8800 and VSP 4000.
Layer 2 loop prevention
46 Network Design Reference for Avaya VSP 4000 Series June 2015
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