unstable links between a Layer 3 device and other devices. You can configure up to four loopback
interfaces on a Layer 3 device.
You can add up to 24 IP addresses to each loopback interface.
NOTE
If you configure the device to use a loopback interface to communicate with a BGP4 neighbor, you must
also configure a loopback interface on the neighbor and configure the neighbor to use that loopback
interface to communicate with the Brocade device.
To add a loopback interface, enter commands such as those shown in the following example:
Brocade(config)# exit
Brocade(config)# interface loopback 1
Brocade(config)# ip address
10.0.0.1/24
Syntax:
interface loopback
num
The
num
parameter specifies the virtual interface number. You can specify from 1 through the
maximum number of virtual interfaces supported on the device. To display the maximum number of
virtual interfaces supported on the device, enter the
show default values
command.
Assigning an IP address to a virtual routing interface
A virtual interface is a logical port associated with a Layer 3 Virtual LAN (VLAN) configured on a Layer 3
device. You can configure routing parameters on the virtual interface to enable the Layer 3 device to
route protocol traffic from one Layer 3 VLAN to the other, without using an external router.
NOTE
The device uses the lowest MAC address on the device (the MAC address of port 1 or 1/1/1) as the
MAC address for all ports within all virtual interfaces you configure on the device.
Enter commands similar to the following to add a virtual interface to a VLAN and configure an IP
address on the interface.
Brocade(config)# vlan 2 name IP-Subnet_10.1.2.1/24
Brocade(config-vlan-2)# untag 1/1/1 to 1/1/4
Brocade(config-vlan-2)# router-interface ve1
Brocade(config-vlan-2)# interface ve1
Brocade(config-vif-1)# ip address 10.1.2.1/24
The first two commands in this example create a Layer 3 protocol-based VLAN named "IP-
Subnet_10.1.2.1/24" 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. The last two commands change to the
interface configuration level for the virtual interface and assign an IP address to the interface.
Syntax:
router-interface ve
num
Syntax:
interface ve
num
Deleting an IP address
Enter a command similar to the following to delete an IP address.
Brocade(config-if-1/1/1)# no ip address 10.1.2.1
This command deletes IP address 10.1.2.1. You do not need to enter the subnet mask.
Deleting an IP address
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