Configuration Guide User guide

FastIron Configuration Guide 967
53-1002494-02
Configuring IP parameters – Layer 3 Switches
To add a virtual interface to a VLAN and configure an IP address on the interface, enter commands
such as the following.
Brocade(config)# vlan 2 name IP-Subnet_1.1.2.0/24
Brocade(config-vlan-2)# untag ethernet 1 to 4
Brocade(config-vlan-2)# router-interface ve1
Brocade(config-vlan-2)# interface ve1
Brocade(config-vif-1)# ip address 1.1.2.1/24
The first two commands in this example create a Layer 3 protocol-based VLAN name
“IP-Subnet_1.1.2.0/24” and add a range of untagged ports to the VLAN. The router-interface
command creates virtual interface 1 as the routing interface for the VLAN.
Syntax: router-interface ve <num>
The <num> variable specifies the virtual interface number. You can enter a number from 1 through
4095.
When configuring virtual routing interfaces on a device, you can specify a number from 1 through
4095. However, the total number of virtual routing interfaces that are configured must not exceed
the system-max limit of 512. For more information on the number of virtual routing interfaces
supported, refer to “Allocating memory for more VLANs or virtual routing interfaces” on page 795.
The last two commands change to the interface configuration level for the virtual interface and
assign an IP address to the interface.
Syntax: interface ve <num>
Refer to the syntax description in “Assigning an IP address to an Ethernet port” on page 965.
Configuring IP follow on a virtual routing interface
IP Follow allows multiple virtual routing interfaces to share the same IP address. With this feature,
one virtual routing interface is configured with an IP address, while the other virtual routing
interfaces are configured to use that IP address, thus, they “follow” the virtual routing interface
that has the IP address. This feature is helpful in conserving IP address space.
Configuration limitations and feature limitations for IP Follow on a virtual routing interface
• When configuring IP Follow, the primary virtual routing interface should not have ACL or DoS
Protection configured. It is recommended that you create a dummy virtual routing interface as
the primary and use the IP-follow virtual routing interface for the network.
• Global Policy Based Routing is not supported when IP Follow is configured.
• IPv6 is not supported with ip-follow.
• FastIron devices support ip-follow with OSPF and VRRP protocols only.
Configuration syntax for IP Follow on a virtual routing interface
Configure IP Follow by entering commands such as the following.
Brocade(config)# vlan 2 name IP-Subnet_1.1.2.0/24
Brocade(config-vlan-2)# untag ethernet 1 to 4
Brocade(config-vlan-2)# router-interface ve1
Brocade(config-vlan-2)# interface ve 1
Brocade(config-vif-1)# ip address 10.10.2.1/24