Motorola Series Switch WS5100 - Manual (Page 210)

5-40 WS5100 Series Switch System Reference Guide
3. Refer to the following information within the Peer Statistics tab:
4. Click the Clear Statistics button to remove the data displayed for the selected peer IP address.
5.5.4 Reviewing Layer 3 MU Status
The Layer 3 Mobility MU Status tab displays a set of MU stats for associated MUs within the mobility
domain. Use the MU status information to familiarize yourself with these MUs and their mobility-related
parameters to distinguish new MUs entering the network from existing MUs roaming within the mobility
domain.
To view Layer 3 mobility MU statistics
1. Select Services > Layer 3 Mobility from the main menu tree.
The Layer 3 Mobility screen appears with the Configuration tab displayed.
Peer IP Displays the IP addresses of the peer switches within the mobility domain. Each peer can
handle up to a maximum of 500 MUs.
JOIN Events
sent/rcvd Displays the number of JOIN messages sent and received. JOIN messages advertise the
presence of MUs entering the mobility domain for the first time. When a MU (currently not
present in the MU database) associates with a switch, it immediately sends a JOIN message
to the host switch with the its MAC, VLAN and IP information (both current and home switch
IP info). The home switch forwards the JOIN to all its peers, except the one from which it
received the original message. JOIN messages are always originated by the current switch.
JOIN messages are also used during the home switch selection phase to inform a candidate
home switch about a MU. The current switch selects the home switch (based on its local
selection mechanism) and sends a JOIN message to the home switch that is forwarded it to
all its peers.
LEAVE Events
sent/rcvd Displays the number of LEAVE messages sent and received. LEAVE messages are sent when
the switch decides a MU originally present in the MU database is no longer present in the
mobility domain. The criterion to determine the MU has actually left the network is
implementation specific. The current switch sends the LEAVE message with the MU's MAC
address information to the home switch, which eventually forwards the message to each
mobility peer.
L2-ROAMs
sent/rcvd Displays the number Layer 2 ROAM messages sent and received. When a MU roams to a
new switch on a different layer 3 network (MU is mapped to a different VLAN ID), it sends a
L3-ROAM message to the home switch with the new IP information for the current switch it
is associated with. The L3-ROAM message is then forwarded by the home switch to each
peer.
L3-ROAMs
sent/rcvd Displays the number Layer 3 ROAM messages sent and received. When a MU roams to a
new current switch on the same layer 3 subnet as the old current switch), it sends a L2-
ROAM message to the old home switch with the new home switch-IP and current switch-IP
information. This L2-ROAM message is then forwarded by the old home switch to each peer.