Examkin

Soru

Zorluk: OrtaIPv6 Static Routing

A network administrator must configure a static route on router R1 to reach the destination subnet 2001:db8:acad:10::/642001:\text{db8}:\text{acad}:10::/64. The administrator intends to use the link-local address fe80::2:1\text{fe80}::2:1 of the adjacent router as the next hop via R1's local exit interface GigabitEthernet0/0/1. Which Cisco IOS command accurately achieves this configuration?

  1. ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::2:1Cevap
  2. B
    ipv6 route 2001:db8:acad:10::/64 fe80::2:1
  3. C
    ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1
  4. D
    ipv6 route fe80::2:1 2001:db8:acad:10::/64 GigabitEthernet0/0/1

Cevap

The correct command is 'ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::2:1'.
The command specifying both the exit interface GigabitEthernet0/0/1 and the link-local address fe80::2:1 is correct. In Cisco IOS, whenever a link-local address is designated as the next hop, the local outbound interface MUST also be specified (creating a fully specified static route) because link-local addresses are only unique within the scope of a single link.

Adım Adım Çözüm

1
Identify the basic command syntax for IPv6 static routing in Cisco IOS.
The general structure is 'ipv6 route <destination-prefix/prefix-length> {next-hop-address | exit-interface} [next-hop-address]'.
This establishes the order of arguments required by Cisco IOS.
2
Evaluate the requirement of using a link-local address (FE80::/10) as the next hop.
Link-local addresses are non-global and exist only on a single link. The router must know which physical/logical interface leads to that link-local address.
Without specifying the local exit interface, the router cannot resolve which egress interface connects to the specified link-local address.
3
Construct the fully specified IPv6 static route command.
Combine the destination network '2001:db8:acad:10::/64', the local exit interface 'GigabitEthernet0/0/1', and the next-hop link-local address 'fe80::2:1'.
This forms the complete and syntactically correct command 'ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::2:1'.

Anahtar Kavram

IPv6 Static Routing with Link-Local Next-Hop
Bu soruyu puanla

Konular

IPv6 Static Routing

Bu konudan daha fazla soru