Free Access Cisco 350-501 New Release

To configure multi-topology IS-IS for IPv6, the router must be configured with the ipv6 router isis command under the interface configuration mode. This command enables IS-IS for IPv6 on the interface. The ipv6 router isis command is used to enable IS-IS for IPv6 on an interface. The multi-topology keyword specifies that the interface will participate in multiple topologies. The level-1 and level-2 keywords specify the IS-IS levels for which the interface will participate. In this case, we want the interface to participate in both Level 1 and Level 2 topologies, so we use both keywords. 

https://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/215215-segment-routing -overview-and-migration-g.html

• PE-2 should import the OSPF route from the global routing table into the CUSTOMER-ABC VRF. This allows the VRF to have internet reachability.
• The configuration should include an import route-target statement under the VRF configuration on PE-2. The route target should match the one used by CE-1 to advertise the default route (0.0.0.0/0) to PE-1.

References:

• Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) study guide or official documentation.

Wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single fiber [1], using different wavelengths of light to carry different signals. This allows for a greater capacity for data transfer and enables the addition of new wavelengths in a fiber-optic network