Loop Prevention Recommendations - Avaya 8800 Planning And Engineering

Layer 2 loop prevention

Loop prevention recommendations

The following table describes the loop prevention features available for release 4.1.x and later.
For best loop prevention, Avaya recommends that you use SLPP.
Table 24: Loop prevention by release
Software
release
4.1.x and on
Note 1: SF/CPU protection mechanism; do not enable on IST links.
Note 2: With Release 4.1.1.0 and later, Avaya recommends that you use the Soft Down
option versus Hard Down.
Note 3: Do not enable SLPP on IST links.
The following table provides the Avaya recommended CP-Limit values.
Table 25: CP-Limit recommended values
Aggressive
Access SMLT/SLT
Server
Core SMLT
Moderate
Access SMLT/SLT
Server
Core SMLT
Relaxed
Access SMLT/SLT
Server
Core SMLT
112 Planning and Engineering — Network Design
CP-Limit Loop detect
Yes (see Note 1) No
Broadcast
1000
2500
7500
2500
5000
9000
4000
7000
10 000
Ext-CP-Limit
Yes (soft down) Yes (see Note 3)
(see Notes 1
and 2)
CP-Limit Values
Multicast
1000
2500
7500
2500
5000
9000
4000
7000
10 000
SLPP
November 2010