Cisco 7604 Configuration Guide - Page 126
Configuring Interfaces for Routed Firewall Mode, Guidelines and Limitations
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Configuring Interfaces for Routed Firewall Mode Chapter 6 Configuring Interface Parameters • established command-This command allows return connections from a lower security host to a higher security host if there is already an established connection from the higher level host to the lower level host. If you enable communication between same security interfaces (see the "Allowing Communication Between Interfaces on the Same Security Level" section on page 6-10), you can configure established commands for both directions. Configuring Interfaces for Routed Firewall Mode This section includes the following topics: • Guidelines and Limitations, page 6-2 • Configuring an Interface, page 6-3 Guidelines and Limitations See the following guidelines for configuring an interface: Multiple Context Mode Guidelines • You can only configure context interfaces that you already assigned to the context in the system configuration using the allocate-interface command. • All allocated interfaces are enabled by default, no matter what the state of the interface is in the system execution space. However, for traffic to pass through the interface, the interface also has to be enabled in the system execution space. If you shut down an interface in the system execution space, then that interface is down in all contexts that share it. See the "Turning Off and Turning On Interfaces" section on page 6-12. • Configure the context interfaces from within each context. • Configure failover interfaces in the system configuration; do not configure failover interfaces with this procedure. See Chapter 14, "Configuring Failover," for more information. VLAN ID Guidelines You can add any VLAN ID to the configuration, but only VLANs that are assigned to the FWSM by the switch can pass traffic. To view all VLANs assigned to the FWSM, use the show vlan command. If you add an interface for a VLAN that is not yet assigned to the FWSM by the switch, the interface will be in the down state. When you assign the VLAN to the FWSM, the interface changes to an up state. See the show interface command for more information about interface states. Failover Guidelines If you are using failover, do not use this section to name interfaces that you are reserving for failover and Stateful Failover communications. See Chapter 14, "Configuring Failover," to configure the failover and state links. Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 6-2 OL-20748-01
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