Configuration Guide User guide

1052 FastIron Configuration Guide
53-1002494-02
IPv4 point-to-point GRE tunnels
The ethernet <portnum> variable is the source slot (chassis devices only) and port number of the
physical interface being configured for the specified tunnel, for example 3/1.
The ve <number> variable is the VE interface number being configured for the specified tunnel.
Deleting an IP address from an interface configured as a tunnel source
To delete an IP address from an interface that is configured as a tunnel source, first remove the
tunnel source from the tunnel interface then delete the IP address, as shown in the following
example.
Brocade(config-if-e1000-1/3)# interface tunnel 8
Brocade(config-tnif-8)# no tunnel source 45.1.83.15
Brocade(config-tnif-8)# interface ethernet 1/3
Brocade(config-if-e1000-1/3)# no ip address 45.1.83.15/24
If you attempt to delete an IP address without first removing the tunnel source, the console will
display an error message, as shown in the following example.
Brocade# config terminal
Brocade(config)# interface ethernet 1/3
Brocade(config-if-e1000-1/3)# no ip address 45.1.83.15/24
Error - Please remove tunnel source from tnnl 8 before removing IP address
NOTE
The previous error message will also display on the CLI when an interface is part of a VLAN. A VLAN
cannot be deleted until the tunnel source is first removed.
Configuring the destination address for a tunnel interface
The destination address should be the address of the IP interface of the device on the other end of
the tunnel.
To configure the destination address for a specific tunnel interface, enter commands such as the
following.
Brocade(config)# interface tunnel 1
Brocade(config-tnif-1)# tunnel destination 131.108.5.2
Syntax: [no] tunnel destination <ip-address>
The <ip-address> variable is the destination IP address being configured for the specified tunnel.
NOTE
Ensure a route to the tunnel destination exists on the tunnel source device. Create a static route if
necessary. For configuration details, refer to “Configuring a static route to a tunnel destination” on
page 1054.
Enabling GRE encapsulation on a tunnel interface
To enable GRE encapsulation on a tunnel interface, enter commands such as the following.
Brocade(config)# interface tunnel 1
Brocade(config-tnif-1)# tunnel mode gre ip