User's Manual

Configuring GRE, NAT, RIPSO, and BFE Services
1-10
308625-14.00 Rev 00
Adding a Protocol to the Local Tunnel End Point
The Nortel Networks implementation of GRE tunneling supports the
encapsulation of the IP and IPX protocols over a GRE tunnel. When you add a
protocol to a tunnel, you are configuring its local logical interface. The local
logical interface is the address of the local host, the tunnel’s local logical end
point. This address is not visible to the network cloud that the tunnel passes
through.
Using the BCC
You can use the BCC to add one IP and one IPX protocol interface to a GRE
tunnel.
Adding an IP Protocol Interface
To add an IP protocol interface to a GRE tunnel, navigate to the GRE tunnel
interface prompt (for example,
box; tunnels; gre/boston
) and enter:
ip address
<address>
mask
<address>
address
is the valid IP address of the host interface at the local end of the tunnel
expressed in dotted-decimal notation.
mask is the mask associated with the IP address.
For example, the following command adds the IP interface 9.9.9.1/255.255.255.0
to the tunnel boston:
gre/boston#
ip address 9.9.9.1 mask 255.255.255.0
ip/9.9.9.1/255.255.255.0#
For a complete description of IP interface configuration, see Configuring IP, ARP,
RARP, RIP, and OSPF Services.
To configure an IPX protocol interface, go to the next section. Otherwise, go to
“Configuring the Remote Tunnel End Point” on page 1-12.
Note:
You can configure OSPF on either a GRE tunnel’s physical interfaces
or its logical interfaces, but not on both. When configuring OSPF on a GRE
tunnel, disable MTU mismatch detection. If the MTU mismatch parameter is
enabled, an OSPF adjacency may fail to form over the tunnel.