Understanding and Configuring DLEP

After configuring the interfaces and verifying connectivity as described in “Configuring the Interfaces,” the next step is to configure the protocols for those interfaces. The Dynamic Link Exchange Protocol (DLEP) is a radio aware routing (RAR) protocol.

Prerequisite Reading

Read Chapter 5, “Introduction to Radio Aware Routing and MANET” before selecting the appropriate protocol per each interface configured in “Configuring the Interfaces,”.

Note See Appendix A, “Command Reference” for detailed command reference.

Configuring DLEP

This chapter provides the following major sections for initiating, verifying, and managing all aspects of Dynamic Link Exchange Protocol (DLEP) on an interface:

Configuring the Physical Interface

In addition to configuring a description, IP address, and other interface characteristics, you must specify that the physical interface use a virtual template which is the source for all of the DLEP Virtual-Access interfaces.

To configure the virtual template for an interface, perform the following procedure:

SUMMARY STEPS

1. enable

2. configure terminal

3. intereface FastEthernet0/1

4. description description

5. ip address A.B.C.D a.b.c.d

6. no ip proxy-arp

7. ip dlep vtemplate number

8. duplex auto

9. speed auto

10. ipv6 enable

DETAILED STEPS

 

Command or Action
Purpose

Step 1

enable

 

Router> enable

Router#

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

 

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Enters global configuration mode.

Step 3

interface fastethernet number

 

 

 

Router(config)# interface fastethernet0/1

Router(config-if)#

Enters interface configuration mode.

Step 4

description description

 

Router(config-if)#description DLEP RADIO CONNECTION

Specifies a description for the interface.

In this example, the description is DLEP RADIO CONNECTION.

Step 5

ip address A.B.C.D a.b.c.d

 

Router(config-if)#ip address 10.10.10.4 255.255.255.0

Specifies the IP address and subnet mask for the physical interface.

In this example, the IP address is set to10.10.10.4 and the subnet mask is 255.255.255.0.

Step 6

no ip proxy-arp

 

Router(config-if)#no ip proxy-arp

Prevents the interface from responding to ARP requests for other routers on the interface.

This command is required for DLEP.

Step 7

ip dlep vtemplate number port number

 

 

 

Router(config-if)#ip dlep vtemplate number 13

Initiates DLEP on the interface by setting the virtual-access template number and optional port number. The valid values for the templates range from 1 to 4096.

The valid values for the port number range from 1 to 65534. If you do not specify a port number, Port number 55555 is used be default.

Step 8

duplex auto

Configures the interface to automatically set up duplexing.

Step 9

speed auto

Configures the interface to automatically negotiate with the corresponding interface and set the communication speed.

Step 10

ipv6 enable

Enables IPv6 on the interface.

Step 11

exit

 

Router(config-if)# exit

Router(config)#

Exits the current mode.

Disabling Virtual Template Subinterfaces

By default, Cisco IOS configures virtual-access interfaces as subinterfaces. You must enter the no virtual-template subinterface command so that the virtual access interfaces are not configured as sub-interfaces.

Creating the Virtual Template

Perform this task to create the DLEP virtual template:

SUMMARY STEPS

1. enable

2. configure terminal

3. interface Virtual-Template number

4. ip unnumbered FastEthernet0/1

5. exit

DETAILED STEPS

 

Command or Action
Purpose

Step 1

enable

 

Router> enable

Router#

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

 

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Enters global configuration mode.

Step 3

interface Virtual-Template number

 

Router(config)# interface Virtual-Template 13

Router(config-if)#

Creates a virtual template for DLEP.

This example creates virtual template 13.

Step 4

ip unnumbered FastEthernet0/1

 

Router(config-if)#ip unnumbered FastEthernet0/1

Specifies the physical interface where the VMI retrieves the IP address for the physical interface.

Step 5

exit

 

Router(config-if)# exit

Router(config)#

Exits the current mode.

Configuring the VMI

The VMI is the upper level in the RAR environment that communicates with the routing protocols. It is important to set the IP address to unnumbered and to the physical interface so that the VMI knows where to get the IP address for each virtual-access interface.

It is equally important to set the physical interface correctly, so that DLEP knows where to insert the packets for delivery.

To configure the VMI, perform the following procedure:

SUMMARY STEPS

1. enable

2. configure terminal

3. intereface vmi number

4. ip unnumbered FastEthernet0/1

5. physical-interface Fast-Ethernet0/1

6. ipv6 enable

7. ospfv3 1 network manet

8. ospfv3 1 area0

9. ospfv3 2 network manet

10. ospfv3 2 area 0 ipv4

11. exit

DETAILED STEPS

 

Command or Action
Purpose

Step 1

enable

 

Router> enable

Router#

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

 

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Enters global configuration mode.

Step 3

interface vmi number

 

Router(config)# interface vmi 1

Router(config-if)#

Creates a VMI and enters interface configuration mode.

This example creates VMI1.

Step 4

ip unnumbered FastEthernet0/1

 

Router(config-if)#ip unnumbered FastEthernet0/1

Specifies the physical interface where the VMI retrieves the IP address for the physical interface.

Step 5

physical-interface FastEthernet0/1

 

Router(config-if)#physical-interface FastEthernet0/1

Specifies where the Virtual-Access interface inserts packets for delivery.

Step 6

ipv6 enble

Enables IPv6 on the VMI.

Step 7

 

 

Router(config-if)#ospfv3 1 network manet

Router(config-if)#ospfv3 1 area 0

Router(config-if)#ospfv3 2 network manet

Router(config-if)#ospfv3 area 0 ipv4

Configure the routing protocols for your network. These commands will vary depending on the routing protocol for the network.

This example configures ospfv3 as the routing protocol using manet as the network type, and uses address families for IPv4 addressing.

Step 8

exit

 

Router(config-if)# exit

Router(config)#

Exits the current mode.

Configuring Optional Timers

DLEP has several optional timers that you can configure. Cisco recommends that you use the defaults settings for these timers. These commands are documented in the Appendix A, “Command Reference.”

Verifying DLEP Configuration

The following examples show how to verify DLEP configuration on the router interface:

Note You can display general information as in the following examples:

  • For DLEP clients:
Router> show dlep clients ?
FastEthernet FastEthernet IEEE 802.3
Vlan Vlan IEEE 802.1q
| Output modifiers
<cr>
 
  • For the DLEP server configuration:
Router> show dlep config ?
FastEthernet FastEthernet IEEE 802.3
Vlan Vlan IEEE 802.1q
| Output modifiers
<cr>
 
  • For DLEP neighbors:
Router> show dlep neighbors ?
FastEthernet FastEthernet IEEE 802.3
Vlan Vlan IEEE 802.1q
| Output modifiers
<cr>

 

Displaying Information for DLEP Clients

This example shows how to display router-to-radio peer associations on DLEP interfaces.

Router> show dlep clients
 
DLEP Clients for all interfaces:
 
 
DLEP Clients for Interface FastEthernet0/1
DLEP Server IP=12.12.12.101:55555 Sock=1
 
 
DLEP Client IP=12.12.12.7:38681
Peer ID=1, Virtual template=13
Description: DLEP_Radio_Sim_1
Peer Timers (all values in seconds):
Heartbeat=10, Dead Interval=40, Terminate ACK=10
Neighbor Timers (all values in seconds):
Activity timeout=0, Neighbor Down ACK=10

Displaying DLEP Router Configuration

This example shows how to display configuration details for the DLEP server configuration:

Router> show dlep config
DLEP Configuration for FastEthernet0/1.5
 
DLEP Server IP=10.10.5.4:55555
Virtual template=13
Missed heartbeat threshold=4, Peer Terminate ACK timeout=10
Neighbor activity timeout=0, Neighbor Down ACK timeout=10

Displaying Neighbors on a DLEP Interface

This example shows how to display information about established neighbor sessions on DLEP interfaces.

Router> show dlep neighbors
DLEP Neighbors for Interface FastEthernet0/1
DLEP Server IP=12.12.12.101:55555 Sock=1
 
 
SID=2150 MAC_Address=1122.3344.5566
Addresses:
No Layer 3 addresses are specified.
Metrics: rlq=100 resources=100 latency=250 milliseconds
cdr=100000000 bps mdr=100000000 bps

Technical Support for DLEP

Contact your Cisco Support engineer for any troubleshooting support you may need. The following information is available for your reference:

Caution We do not recommend that you change the default DLEP configuration unless a Cisco Support engineer instructs you to do so.