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How to Configure and Use AMF on Allied Telesis Switches | Page 17
AMF network guidelines
Loop-free data plane
The current version of AMF does not control the data plane, so it is a requirement that the
network is configured such that the data plane is kept loop free.
Note: Currently AMF does not support the use of STP on links between AMF nodes. Use
of STP with redundant network links has the potential to block AMF control
connections, and also could lead to periods of traffic leakage during the start of
automatic node recovery. Hence, if there are physical loops in any of the data VLANs
in the network, then EPSR must be used as the protection mechanism for those loops.
Aggregators
Dynamic Aggregators (LACP) cannot be used on ports configured as AMF links or cross-
links. Therefore any aggregated links in an AMF network need to be configured as static
aggregators.
VCStacks
If any VCStacks are included as AMF nodes it is a requirement that the VCS virtual MAC
feature is enabled to ensure correct operation of the AMF network. If the VCStack is running
as an AMF master node it is also a requirement that removable external storage media is
installed in both stack members.
AMF external removable media
All AMF master nodes require external storage media (e.g. USB memory stick, SD card) to
be installed. This external storage is used to hold a backup of all relevant files from all nodes
within the AMF network, including other master nodes, so it must be large enough to be able
to accommodate all of the backed up files. Files that are backed up include all configuration
files, release files, and scripts, but not core dumps, exception logs, or technical support files.
Typi c al ly a 4GB capacity external media device would be of sufficient size to hold backups for
a 40 node AMF network.
When using Dual CFCs in a SBx8100, a memory stick is required in both CFCs.