Specifications

AMF Introduction and Configuration
148 New and Enhanced Features in AlliedWare Plus 5.4.4 Major and Minor Versions
AMF Safe Configuration
If AMF automatic node recovery fails, AMF contains a safety net feature that puts the
replacement node into a safe configuration state. This is to prevent an unconfigured
device from joining the network and creating loops.
Detecting AMF Safe Configuration Operation
A log message will be generated when AMF safe configuration is applied. This message
will appear in the log some time after the startup sequence.
The message will also be output to the console or any connected VTY session.
AMF Safe Configuration Procedures
The procedures for AMF safe configuration are shown below:
■ A special VLAN is created in the disabled state and given the name
atmf_node_recovery_safe_vlan. The VID of this VLAN is determined dynamically to
ensure that it does not conflict with either of the AMF management VLANs, or any
other VLANs that are detected on the AMF network.
■ All ports are removed from their default VLAN membership (VLAN 1).
■ All ports are set as tagged members of the safe VLAN.
■ Additionally, all ports that are not an AMF link or cross-link are shut down. The links
and crosslinks are detected by AMF and added to the dynamic configuration. This is
done to ensure correct behavior of static aggregators and Layer 3 protocols
configured on the neighboring devices.
Figure 19: Show vlan command output with the brief parameter set for a device in
AMF safe configuration mode
awplus#sh vlan brief
VLAN ID Name Type State Member ports (u)-Untagged, (t)-Tagged
======= ================ ======= ======= =======================================
1 default STATIC ACTIVE
4090 atmf_node_recovery_safe_vlan
STATIC SUSPEND port1.1.1(t) port1.1.2(t) port1.1.3(t)
port1.1.4(t) port1.1.5(t) port1.1.6(t)
port1.1.7(t) port1.1.8(t) port1.1.9(t)
port1.1.10(t) port1.1.11(t)
port1.1.12(t) port1.1.13(t)
port1.1.14(t) port1.1.15(t)
port1.1.16(t) port1.1.17(t)
port1.1.18(t) port1.1.19(t)
port1.1.20(t) port1.1.21(t)
port1.1.22(t) port1.1.23(t)
port1.1.24(t)