3Com 4007, Implementation Manual, Page: 61 / 684

Creating a Redundant Configuration 61
The Standby LED, located on front panel of the EME that fails over,
continues to display
Active
. This is because the two components that
make up the EME (SMC and SCC) are independent of each other.
Therefore, when the SMC fails over, the SCC on the same EME continues
to be active.
Connectivity Rules The following connectivity rules apply after you establish EME
redundancy:
■
You can only access the secondary EME through its console port or its
auxiliary port (not the 10BaseT port).
■
You cannot Telnet to the secondary EME from an external source
because both the primary EME and the secondary EME share the same
IP address for the front panel port. The front panel port is enabled only
for the primary EME and disabled on the secondary EME. Therefore,
when you attempt to Telnet to the shared IP address, you always
access the primary EME.
■
You cannot move from the primary EME to the secondary EME during
a Telnet session (also known as
telnet-hopping ).