1026 Configuring Routing Interfaces
Default Routing Interface Values
By default, no routing interfaces are configured.
When you create a VLAN, no IP address is configured, and DHCP is disabled.
After you configure an IP address on a VLAN or loopback interface, the VLAN
interface is available for L3 routing (if enabled) and is capable of resolved
ARPs and responding to pings, and the interface has the default configuration
shown in Table31-1.
Most interface configuration parameters are not applicable to loopback
interfaces, so you cannot change the default values. However, when you create
a loopback interface, the default values are similar to those of VLAN routing
interfaces, as Table31-1 shows.
When you create a tunnel, it has the default values shown in Table31-2
Table 31-1. VLAN Routing Interface and Loopback Inte rface Defaults
Parameter Default Value
Forward Net Directed Broadcasts Disabled
Encapsulation Type Ethernet (N/A for loopbacks)
Proxy Arp Enabled
Local Proxy Arp Disabled
IP MTU 1500
Bandwidth Not configured.
Destination Unreachables Enabled
ICMP Redirects Enabled
Table 31-2. Tunnel Interface Defaults
Parameter Default Value
Tunnel mode 6-in-4 configured
Link Local Only Mode Disabled
Source address None
Destination address 0.0.0.0