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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
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Chapter 8 Management Network Connectivity
TCP/IP and OSI Networking
8.6.7.1 Provisioning IP-over-CLNS Tunnels
IP-over-CLNS tunnels must be carefully planned to prevent nodes from losing visibility or connectivity.
Before you begin a tunnel, verify that the tunnel type, either Cisco IP or GRE, is supported by the
equipment at the other end. Always verify IP and NSAP addresses. Provisioning of IP-over-CLNS
tunnels in CTC is performed on the node view Provisioning > OSI > IP over CLNS Tunnels tab. For
procedures, see the “Turn Up a Node” chapter in the Cisco ONS 15310-MA SDH Procedure Guide.
Provisioning IP-over-CLNS tunnels on Cisco routers requires the following prerequisite tasks, as well
as other OSI provisioning:
• (Required) Enable IS-IS
• (Optional) Enable routing for an area on an interface
• (Optional) Assign multiple area addresses
• (Optional) Configure IS-IS interface parameters
• (Optional) Configure miscellaneous IS-IS parameters
The Cisco IOS commands used to create IP-over-CLNS tunnels (CTunnels) are shown in Table 8-13.
If you are provisioning an IP-over-CLNS tunnel on a Cisco router, always follow procedures provided
in the Cisco IOS documentation for the router you are provisioning. For information about ISO CLNS
provisioning including IP-over-CLNS tunnels, refer to the “Configuring ISO CLNS” chapter in the
Cisco IOS Apollo Domain, Banyon VINES, DECnet, ISO CLNS, and XNS Configuration Guide.
8.6.7.2 IP Over CLNS Tunnel Scenario 1: ONS Node to Other Vendor GNE
Figure 8-19 shows an IP-over-CLNS tunnel created from an ONS node to another vendor GNE. The
other vendor NE has an IP connection to an IP DCN to which a CTC computer is attached. An OSI-only
(LAP-D) RS-DCC and a GRE tunnel are created between the ONS NE 1 to the other vender GNE.
IP-over-CLNS tunnel provisioning on the ONS NE 1:
• Destination: 10.10.10.100 (CTC 1)
• Mask: 255.255.255.255 for host route (CTC 1 only), or 255.255.255.0 for subnet route (all CTC
computers residing on the 10.10.10.0 subnet)
• NSAP: 39.840F.80.1111.0000.1111.1111.cccccccccccc.00 (other vendor GNE)
• Metric: 110
Table 8-13 IP Over CLNS Tunnel Cisco IOS Commands
Step Step Purpose
1 Router (config) # interface ctunnel
interface-number
Creates a virtual interface to transport IP over a
CLNS tunnel and enters interface configuration
mode. The interface number must be unique for each
CTunnel interface.
2 Router (config-if # ctunnel destination
remote-nsap-address
Configures the destination parameter for the
CTunnel. Specifies the destination NSAP1 address of
the CTunnel, where the IP packets are extracted.
3 Router (config-if) # ip address
ip-address mask
Sets the primary or secondary IP address for an
interface.