3com 5104M-FIB User Manual
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SET SECURITY_ADVANCED PORT JAMMING
SET
SECURITY_ADVANCED
PORT JAMMING
SECURITY_ADVANCED
PORT JAMMING
Use the SET SECURITY_ADVANCED PORT JAMMING command to prevent
eavesdropping and intruder packets on an Ethernet network that has an
Ethernet Private Line Card assigned to it.
eavesdropping and intruder packets on an Ethernet network that has an
Ethernet Private Line Card assigned to it.
Port jamming enables you to prevent eavesdropping, jam frames sourced from
an intruder on a secure network, and optionally jam all packets for which there
is no associated security message.
an intruder on a secure network, and optionally jam all packets for which there
is no associated security message.
When you enable port jamming and the system transmits a packet on the
network, the Ethernet Private Line Card sends a security message to all media
modules on the secure network. This message instructs the media module to
jam all ports on the secure network except the port that is the intended
recipient of the transmitted packet.
network, the Ethernet Private Line Card sends a security message to all media
modules on the secure network. This message instructs the media module to
jam all ports on the secure network except the port that is the intended
recipient of the transmitted packet.
If jamming is enabled on a per-port level, you must also enable network
eavesdrop protection and connect each port to a secure network. If you also
want to prevent each port from seeing intruder transmissions, you must enable
the intruder jamming network parameter.
eavesdrop protection and connect each port to a secure network. If you also
want to prevent each port from seeing intruder transmissions, you must enable
the intruder jamming network parameter.
The port jamming parameter is enabled by default. This prevents new users
from both eavesdropping and seeing packets sourced from an intruder on
another port.
from both eavesdropping and seeing packets sourced from an intruder on
another port.
Format
Example
The following command enables port jamming on port 5.1:
CB5000> set security_advanced port 5.1 jamming enable
Port 05.01 jamming set to ENABLED.
Related Command
SHOW SECURITY_ADVANCED
set security_advanced port
slot.port
enable
disable
jamming
slot.all
slot.port
Identifies the port for this operation.
slot (1 through 17) is the slot number location of a module in the hub
and port (1 through 40) is the port number on the specified module.
For example, to identify port 4 on the module in slot 6, enter
and port (1 through 40) is the port number on the specified module.
For example, to identify port 4 on the module in slot 6, enter
6.4
slot.all
Specifies all ports in a slot. slot
is the slot number.
enable
Enables jamming.
disable
Disables jamming.