Cisco Systems RJ-45-to-AUX Determining the Slot Number in Which a Module Resides, Port Security

The auto syntax allows the port to autonegotiate the port speed. On an Ethernet or Fast Ethernet interface, use the command

set port duplex mod_num/port_num {fullhalfauto}

to set the port duplex mode. Again, the auto syntax can be used to allow the port to autonegotiate the duplex mode.

Port Security

You can use port security to block a NIC on an Ethernet, Fast Ethernet, or Gigabit Ethernet port when the MAC address of the station attempting to access the port is different than the MAC addresses specified to access that port. There must be at least one default MAC address per port for the port to be secured. The total number of MAC addresses on any port cannot exceed 1,025. You must also follow other guidelines when configuring port security:

∙You cannot configure port security on a trunk port.

∙Port security is not supported on the three−port Gigabit Ethernet module.

∙You cannot enable port security on a Switched Port Analyzer (SPAN) destination or source port.

∙You cannot configure dynamic, static, or permanent CAM entries for a secure port.

When port security on a port is enabled, any static or dynamic CAM entries associated with the port are cleared. Any currently configured permanent CAM entries are treated as secure.

Manually Configured MAC Addresses

Different IP addresses can be assigned to the virtual VLAN interfaces on the device; all of them utilize the same global MAC address. However, specifying an individual MAC address to each interface does have benefits in some situations. Assigning an individual MAC address to each interface offers these two main benefits:

∙Allows the best use of Fast EtherChannel for load distribution

∙Enhanced management with the use of the Multilayer Switching (MLS) cache

Determining the Slot Number in Which a Module Resides

To determine the slot number in which a module or card resides, use the following steps:

1. On the switch console, enter the enable command and the password to enter Privileged mode:

Coriolis5000# enable

Password: ********

Coriolis5000>(enable)

2. Enter the show module command to determine what cards are present:

Coriolis5000>(enable)		show module
Mod Module−Name Ports		Module−Type	Model	Serial−Num Status
——— ——————————— —————		———————————————	——————	————————	————
1	0	Supervisor III	WS−X5530	010854649	ok
2	24	10/10ObaseTX Ethernet	WS−X5225R	012453433	ok
3	1	Route Switch	M−X5302	007673460	ok
Mod MAC−Address(es)		Hw	Fw	Sw

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