Refer to the Cisco IOS XE IS-IS configuration exhibit.
What are two problems with the configuration that are causing the IPv4, or the IPv6, or the IPv4
and IPv6 IS-IS operations to fail? (Choose two.)
A.
The configuration is missing the interface gi0/0 and interface gi0/0 commands under router isis
1.
B.
The configuration is missing the address-family ipv4 unicast and address-family ipv6 unicast
commands under router isis 1.
C.
IPv6 unicast routing has not been enabled globally on the Cisco IOS XE router.
D.
The gi0/0 and gi0/1 interfaces are not participating in the router isis 1 routing instance.
E.
Multitopology IS-IS must be enabled to support both IPv4 and IPv6.
F.
Another router isis instance must be enabled to support IPv6.
Explanation:
http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_50_se/configurat
ion/guide/swipv6.pdf
• When using user-network interface (UNI) or enhanced network interface (ENI) ports for any
IPv6-related features, you must first globally enable IP routing and IPv6 routing on the switch by
entering the ip routing ipv6 unicast-routing
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/xe-3s/irs-xe-3s-book/ip6-route-isis-xe.html
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/configuration/xe-3s/ipv6-xe-3s-book/ip6-addrg-bsc-con.html#GUID-6B643D7E-F27F-457B-83D2-160BF75EE0EE
Before configuring the router to run IPv6 IS-IS, globally enable IPv6 using the ipv6 unicast-routing global configuration command.
1. configure terminal
2. ipv6 unicast-routing
3. router isis {area-process}
4. net {network-entity-title}
5. exit
6. interface {type number}
7. ipv6 address {ipv6-address / prefix-length | prefix-name sub-bits/prefix-length}
8. ipv6 router isis {area-process}