Specifications

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VPN 3000 Series Concentrator Getting Started
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Chapter 3 Using the VPN Concentrator Manager for Quick Configuration
Configuring IP Interfaces
The MAC Address is the unique hardware MAC (Media Access Control) address for this interface, in
6-byte hexadecimal notation. The screen shows this address only after you first configure an interface,
and you cannot change it.
Step 3 In the Filter field, click the drop-down menu button and select the filter that applies to this interface. The
filter rules govern the handling of data packets through this interface—whether to forward or drop,
according to configured criteria. You can customize filters under regular system configuration on the
Configuration | Policy Management | Traffic Management screens. Cisco supplies the following default
filters with the VPN Concentrator:
• 1. Private (Default)—Allow all packets except source-routed IP packets. (This is the default filter
for the private Ethernet interface.)
• 2. Public (Default)—Allow inbound and outbound tunneling protocols plus ICMP and VRRP. Allow
fragmented IP packets. Drop everything else, including source-routed packets. (This is the default
filter for the public Ethernet interface.)
• 3. External (Default—No rules applied to this filter. Drop all packets. (This is the default filter for
the external Ethernet interface.)
• None—No filter applied to the interface, which means there are no restrictions on data packets.
Step 4 In the Speed field, click the drop-down menu button and select the interface speed:
• 10 Mbps—Fix the speed at 10 Mbps (10BASE-T networks)
• 100 Mbps—Fix the speed at 100 Mbps per second (100BASE-T networks)
• 10/100 auto—Let the VPN Concentrator automatically detect and set the appropriate speed, either
10 or 100 Mbps (default). If you accept the default, be sure that the port on the active network device
(hub, switch, router, etc.) to which you connect this interface is also set to automatically negotiate
the speed. Otherwise, select the appropriate fixed speed.
Step 5 In the Duplex field, click the drop-down menu button and select one of the following interface
transmission modes:
• Auto—Let the VPN Concentrator automatically detect and set the appropriate transmission mode,
either full or half duplex (default). If you accept the default, be sure that the port on the active
network device (hub, switch, or router) to which you connect this interface is also set to
automatically negotiate the transmission mode. Otherwise, select the appropriate fixed mode.
• Full-Duplex—Fix the transmission mode as full duplex—transmission in both directions at the same
time.
• Half-Duplex—Fix the transmission mode as half duplex—transmission in only one direction at a
time.
Step 6 The MTU value you entered via the CLI displays in the MTU field. You do not need to edit it.
Step 7 Click Apply to apply your choices to the interface. Click Cancel to discard your choices.
The Manager returns to the Configuration | Quick | IP Interfaces screen. If you have entered new
parameters for an interface, the screen displays your entries.
Step 8 If you want to modify another Ethernet interface, click on the interface and continue.
If you do not want to modify another interface, click Continue to proceed, and skip to Configuring
System Information, page 3-8.