Cabletron Systems EMM-E6 - Manual (Page 49)

Managing the Hub 2-33
Using the EMM-E6 Hub View
To change a port’s topology status:
1. Click mouse button 3 on the appropriate Port Status box to open the Port
menu.
2. Drag down to Trunk Type, then right to Force Trunk or Not Forced, and
release.
Once Source Address Locking is enabled, a port’s topology state (trunk or station)
cannot be changed, even by using the option described above. Once Source
Address Locking is disabled, a port will respond to a change in topology status
(either one forced by the Trunk Type option above, or one that occurs naturally
due to a change in the number of active source addresses) at the beginning of the
next Source Address Aging Time cycle.
TIP
Older versions of EMM-E6 firmware (revision levels previous to 2.00.16) use slightly
different definitions of station and trunk status: station ports are defined as those which
are detecting no source addresses or only a single source address; trunk ports are those
detecting two or more.
If you are running an older version of firmware, and all of the ports in your
EMM-E6-controlled hub happen to be serving as station ports at the time you enable
Source Address Locking — either because they are connected to a single node, or because
users connected to that port happen not to be on the network at the time Source Address
Locking is enabled — you may end up locking out devices or nodes that should have
access. To avoid this, you may want to force key ports to trunk status, since trunk ports
are unaffected by Source Address Locking.
If you are running a newer version of firmware, you can protect ports from being locked by
forcing them to an Unsecurable status; see Chapter 7, Security, for details. Note, too, that
any port with more than 35 source addresses in its source address table is automatically
considered to be unsecurable.
If you have any questions about which definitions your version of firmware employs, or if
you would like information about upgrading your EMM-E6 firmware, contact the
Cabletron Systems Global Call Center. Also, see Chapter 6, Source Addressing, and
Chapter 7, Security, for more information about station and trunk status.
NOTE
There are three ways to view a port’s current topology status before making changes to its
trunk type: check the Port Status window, which provides both the current number of
active users and the current topology status; check the port’s Source Address List, which
lists the MAC address of each active user; or use the Topology port display form.