Specifications

AMF Commands
250 New and Enhanced Features in AlliedWare Plus 5.4.4 Major and Minor Versions
switchport atmf-crosslink
This command configures the selected port or (statically) aggregated link to be an AMF
crosslink. Running this command will automatically place the port or static aggregator
into trunk mode (i.e. switchport mode trunk).
The connection between two AMF masters must utilize a crosslink. Crosslinks are used to
carry the AMF control information between master nodes. Multiple crosslinks can be
configured between two master nodes, but only one crosslink can be active at any
particular time. All other crosslinks between masters will be placed in the blocking state, in
order to prevent broadcast storms.
Use the no variant of this command to remove any crosslink that may exist for the selected
port or aggregated link.
Syntax switchport atmf-crosslink
no switchport atmf-crosslink
Mode Interface Configuration
Usage Crosslinks can be used anywhere within an AMF network. They have the effect of
separating the AMF network into separate domains.
Where this command is used, it is also good practice to use the switchport trunk native
vlan command with its parameter “none” selected. This is to prevent a network storm on a
topology of ring connected switches.
Example 1 To make a switchport 1.0.1 an AMF crosslink, use the following commands:
Example 2 This example is shown twice. Example 2A is the most basic command sequence. Example
2B is a good practice equivalent that avoids problems such as broadcast storms that can
otherwise occur.
Example 2A To make static aggregator sa1 an AMF crosslink, use the following commands:
Node_1#
configure terminal
Node_1(config)#
interface port1.1.1
Node_1(config-if)#
switchport atmf-crosslink
Node_1#
configure terminal
Node_1(config)#
interface sa1
Node_1(config-if)#
switchport atmf-crosslink