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Cisco ONS 15454 Procedure Guide, R7.0
November 2007
Chapter22 DLPs A500 to A599
DLP- A542 Create an IP-Over-CLNS Tunnel
DLP-A542 Create an IP-Over-CLNS Tunnel
Caution IP-over-CLNS tunnels require two end points. You will create one point on an ONS 15454. The other
end point is generally provisioned on non-ONS equipment including routers and other network elements
(NE). Before you begin, verify that you have the capability to create an OSI over IP tunnel on the other
equipment location.
Step1 In node view, click the Provisioning > OSI > Tunnels tabs.
Step2 Click Create.
Step3 In the Create IP Over OSI Tunnel dialog box, complete the following fields:
•Tunnel Type—Choose a tunnel type:
–
Cisco—Creates the proprietary Cisco IP tunnel. Cisco IP tunnels add the CLNS header to the
IP packets.
–
GRE—Creates a Generic Routing Encapsulation tunnel. GRE tunnels add the CLNS header and
a GRE header to the IP packets.
The Cisco proprietary tunnel is slightly more efficient than the GRE tunnel because it does not add
the GRE header to each IP packet. The two tunnel types are not compatible. Most Cisco routers
support the Cisco IP tunnel, while only a few support both GRE and Cisco IP tunnels. You generally
should create Cisco IP tunnels if you are tunneling between two Cisco routers or between a Cisco
router and an ONS node.
Caution Always verify that the IP-over-CLNS tunnel type you choose is supported by the equipment at the other
end of the tunnel.
•IP Address—Enter the IP address of the IP-over-CLNS tunnel destination.
•IP Mask—Enter the IP address subnet mask of the IP-over-CLNS destination.
•OSPF Metric—Enter the Open Shortest Path First (OSPF) metric for sending packets across the
IP-over-CLNS tunnel. The OSPF metric, or cost, is used by OSPF routers to calculate the shortest
path. The default is 110. Normally, it is not be changed unless you are creating multiple tunnel routes
and want to prioritize routing by assigning different metrics.
•NSAP Address—Enter the destination NE or OSI router NSAP address.
Step4 Click OK.
Purpose This task creates an IP-over-CLNS tunnel to allow ONS 15454s to
communicate across equipment and networks that use the OSI protocol
stack.
Tools/Equipment None
Prerequisite Procedures DLP-A60 Log into CTC, page 17-69
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Provisioning or higher