Advanced Configuration and Management Guide

6.Select Enable next to Encapsulation.

7.Click the Add button to save the changes to the device’s running-config file.

8.Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change to the startup-config file on the device’s flash memory.

Configuring an IP Tunnel

IP tunnels are used to send traffic through routers that do not support PIM or DVMRP multicasting. IP multicast datagrams are encapsulated within an IP packet and then sent to the remote address. Routers that are not configured for PIM or DVMRP route that packet as a normal IP packet. When the DVMRP or PIM router at the remote end of the tunnel receives the packet, the router strips off the IP encapsulation and forwards the packet as an IP Multicast packet.

NOTE: An IP tunnel must have a remote IP interface at each end. Also, for IP tunneling to work, the remote routers must be reachable by an IP routing protocol.

NOTE: Multiple tunnels configured on a router cannot share the same remote address.

EXAMPLE:

To configure an IP tunnel as seen in Figure 9.7, enter the IP tunnel destination address on an interface of the routing switch.

USING THE CLI

To configure an IP address on Router A, enter the following:

HP9300(config)# int e1

HP9300(config-if-1)# ip tunnel 192.3.45.6

NOTE: The IP tunnel address represents the configured IP tunnel address of the destination router. In the case of Router A, its destination router is Router B. Router A is the destination router of Router B.

For Router B, enter the following:

HP9300(config-if-1)# ip tunnel 192.58.4.1

Router A

 

Non-Multicast Capable

Router B

 

HP 9308M

 

Routers

 

HP 9308M

 

Mulitcast Capable Router

 

Mulitcast Capable Router

 

 

 

 

Router

 

 

 

 

192.58.4.1

 

 

192.3.45.6

 

 

IP Tunnel

Router

Router

IP Tunnel

 

Group Group

Group

Router

 

Group Group

Group

Member Member

Member

 

Member Member

Member

 

 

...

 

 

 

...

 

Figure 9.7 IP in IP tunneling on multicast packets in a unicast network

USING THE WEB MANAGEMENT INTERFACE

1.Log on to the device using a valid user name and password for read-write access.

2.Click on the plus sign next to Configure in the tree view to expand the list of configuration options.

3.Click on the plus sign next to DVMRP in the tree view to expand the list of DVMRP option links.

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