• Use the
mlt shutdown-ports-on-disable enable
command to enable the trunk loop
prevention feature. When you perform MLT or DMLT maintenance with loop prevention
enabled, all member links disable except the Destination Lookup Failure (DLF) to prevent
loops.
• Avaya recommends that you use the
mlt <1–64> enable
command to ensure that MLT is
fully functional and that all links are enabled.
SNMP traps
Simple Network Management Protocol (SNMP) traps can be useful troubleshooting tools. With the
VSP 7000 series switches You can enable or disable SNMP traps for the following features:
• Rapid Spanning Tree Protocol (RSTP)
• Dynamic Host Control Protocol (DHCP) Snooping
• Dynamic ARP Inspection (DAI)
• IP Source Guard (IPSG)
• Unicast Storm Control
• Split Multi-Link Trunk (SMLT)
• Open Shortest Path First (OSPF)
• MAC Security
• Virtual Router Redundancy Protocol (VRRP)
For detailed information about configuring SNMP traps, see
Configuring Security on Avaya Virtual
Services Platform 7000 Series
, NN47202–501.
Auto Unit Replacement
With Auto Unit Replacement (AUR), you can replace a failed switch in a stack with a new unit, while
retaining the configuration of the failed switch.
AUR retains the configuration (CFG) image of a unit in a stack during unit replacement. The retained
CFG image from the replaced unit is restored on the new unit.
Important:
AUR requires the stack power to be on during the unit replacement because CFG mirror images
are retained in the DRAM of the stack.
SNMP traps
July 2015
Troubleshooting Avaya VSP 7000 Series
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