Avaya 8600 Technical Configuration Manual page 28

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On an SMLT edge device Spanning Tree Protocol (STP) is not automatically disabled
on the MLT interfaces connecting to the SMLT Cluster and must be expressly disabled
2.2.3.4 Configuring VLACP on SMLT & IST Core links
VLACP is an end to end link integrity protocol. In this design it provides the following benefits:
 Control plane failure detection. A switch where the software is in a hung state will be VLACP
isolated by all it's surrounding neighbors
 One way interface lockup detection. The ability to detect and disable a link affected by either TX-
only lockup or RX-only lockup
 Loss of Node configuration. If a node loses it's configuration following a restart, VLACP on it's
surrounding neighbors will isolate it
Both Site1 and Site2 (only Site1 shown)
CLI
Site1:5# config vlacp enable
Site1:5# config ethernet 2/1,2/3,3/1,3/2,3/3 vlacp macaddress 01:80:c2:00:00:0f
Site1:5# config ethernet 2/1,3/1,3/2 vlacp timeout short
Site1:5# config ethernet 2/1,2/3,3/1,3/2,3/3 vlacp enable
ACLI
Site1:5(config)# vlacp enable
Site1:5(config)# interface GigabitEthernet 2/1,3/1,3/2
Site1:5(config-if)# vlacp timeout short
Site1:5(config-if)# exit
Site1:5(config)# interface GigabitEthernet 2/1,2/3,3/1,3/2,3/3
Site1:5(config-if)# vlacp funcmac-addr 01:80:c2:00:00:0f
Site1:5(config-if)# vlacp enable
Site1:5(config-if)# exit
All of Sites 3, 4 and 5 (only Site3 shown)
CLI
Site3:5# config vlacp enable
Site3:5# config ethernet 2/1,2/2 vlacp macaddress 01:80:c2:00:00:0f
Site3:5# config ethernet 2/1,2/2 vlacp timeout short
Site3:5# config ethernet 2/1,2/2 vlacp enable
ACLI
Site3:5(config)# vlacp enable
Site3:5(config)# interface GigabitEthernet 2/1,2/2
Network Design Implementation to Provide L2 & L3 VPN Connectivity
November 2010
between Sites using SMLT and IPVPN-Lite for ERS 8600
Technical Configuration Guide
avaya.com
28