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User Guide V
2
IU 6400-S Converged Network Appliance
7 - 12
To configure trusted management addresses:
1. In the navigation pane, select Firewall.
2. Within the Trusted Management Addresses, enter a list of trusted
management host addresses or network/masks. The basic firewall rules
will be applied only to those addresses. All other addresses will be
blocked from accessing the device.
If you do not include your management station, or a station to which you
have access, you lose access to the 6400-S. You can only reinstate access by
connecting to the serial console interface.
3. Press Submit.
Setting the Provider MTU size
The Provider MTU size may be set to reduce the latency that is introduced
when large data packets are sent over a slow link. The default setting is 1500
bytes for static IP addresses. PPPoE links negotiate the value automatically
although the value can be overridden using this field. If the Upstream
Bandwidth is less than 256 Kbit/s, the MTU size is automatically reduced to
576 bytes.
When the link rate is set manually, ensure that the device at the far end of the
connection can communicate at the desired rate. Incompatible rates can cause
a loss of communication with the 6400-S!