DLEP IPv6 Unicast
Previous releases of IOS XE offered support for IPv4 unicast traffic over an IPv4 DLEP session. IOS XE 17.12.1a provides support for IPv6 unicast over an IPv4 DLEP session.
This section provides a subset of the overall DLEP information that is found in the IP Routing Configuration Guide, Cisco IOS XE 17.x.
Feature Limitations
DLEP has the following restrictions and limitations:
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Multicast traffic is not supported with DLEP, but is supported with PPPOE.
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DLEP cannot be deployed with High Availability (HA) configuration.
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You must configure the VMI and Virtual-Template before attaching the Virtual-Template to a physical interface.
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The ESR6300 is connected over DLEP radio links and only 1 radio per interface (WAN port only) is supported.
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All configurations for the virtual-template need to be removed individually using the no form of the respective configuration commands, before removing the virtual-template using the no interface virtual-template command.
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Changing of configurations on the virtual-template and VMI interfaces is not supported while DLEP is enabled on the physical interface. In order to make such changes, disable DLEP by removing the DLEP configuration from the physical interface, make the changes, and re-configure DLEP on the physical interface.
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DLEP interface does not support Jumbo frames (frames > 1500 bytes in size).
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Routing of internally generated application traffic (e.g. pingv6) with source as DLEP VMI / physical interface is not supported.
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Viewing information about DLEP neighbors using the show ipv6 neighbor command is not supported.
Configuring DLEP with IPv6 Unicast
Use the following steps to configure DLEP with IPv6 Unicast.
Enable IPv6 unicast routing:
Router#configure terminal
Router(config)#ipv6 unicast-routing
Router(config)#end
Router#
Enable IPv6 on the physical interface:
Router#configure terminal
Router(config)#interface GigabitEthernet0/0/0
Router(config-if)#ipv6 enable
Router(config-if)#end
Router#
Configure the virtual template interface:
Router#configure terminal
Router(config)#interface virtual-template1
Router(config-if)#ip unnumbered GigabitEthernet0/0/0
Router(config-if)#ipv6 enable
Router(config-if)#ipv6 nd dad attempts 0
Router(config-if)#end
Router#
Configure the vmi interface:
Router#configure terminal
Router(config)#interface vmi1
Router(config-if)#ip unnumbered GigabitEthernet0/0/0
Router(config-if)#physical-interface GigabitEthernet0/0/0
Router(config-if)#ipv6 enable
Router(config-if)#end
Router#
Configure the physical interface:
Router#configure terminal
Router(config)#interface GigabitEthernet0/0/0
Router(config-if)#ip address 10.1.1.1 255.255.255.0
Router(config-if)#ipv6 address 1000::1/64
Router(config-if)#ip dlep vtemplate 1
Router(config-if)#end
Router#
Configuring EIGRP for DLEP IPv6 Unicast
Use the following steps to configure EIGRP for DLEP IPv6 Unicast:
Create the EIGRP router:
Router#configure terminal
Router(config)#ipv6 router eigrp 2
Router(config-rtr)#eigrp router-id 2.2.2.2
Router(config-rtr)#end
Router#
Configure EIGRPv6 on VMI:
Router#configure terminal
Router(config)#interface vmi1
Router(config-if)#ipv6 eigrp 2
Router(config-if)#no ipv6 split-horizon eigrp 2
Router(config-if)#end
Router#
Configuring OSPF for DLEP IPv6 Unicast
Use the following steps to configure OSPF for DLEP IPv6 Unicast.
Configure OSPF router:
Router#configure terminal
Router(config)#router ospfv3 1
Router(config-router)#router-id 200.200.200.200
Router(config-router)#address-family ipv6 unicast
Router(config-router-af)#end
Router#
Configure OSPF on the VMI interface:
Router#configure terminal
Router(config)#interface vmi1
Router(config-if)#ospfv3 1 ipv6 area 0
Router(config-if)#ospfv3 1 ipv6 cost dynamic
Router(config-if)#ospfv3 1 ipv6 network manet
Router(config-if)#end
Router#