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Zorluk: OrtaIPv6 Static Routing

A network administrator is configuring IPv6 static routing on router R1 to reach the destination network 2001:db8:acad:10::/642001:\text{db8}:\text{acad}:10::/64. Router R1 connects to neighboring router R2 via interface GigabitEthernet0/0/1. Router R2's connected interface has a global unicast address of 2001:db8:acad:12::2/642001:\text{db8}:\text{acad}:12::2/64 and a link-local address of fe80::2\text{fe80}::2.

Which two Cisco IOS commands represent valid IPv6 static route configurations on R1? (Select two.)

  1. ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::2Cevap
  2. ipv6 route 2001:db8:acad:10::/64 2001:db8:acad:12::2Cevap
  3. C
    ipv6 route 2001:db8:acad:10::/64 fe80::2
  4. D
    ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 2001:db8:acad:12::2/64

Cevap

The valid IPv6 static route configurations are 'ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::2' and 'ipv6 route 2001:db8:acad:10::/64 2001:db8:acad:12::2'.
In Cisco IOS, IPv6 static routes using a link-local address as the next hop require a fully specified syntax that includes the local exit interface. Alternatively, static routes using a global unicast address as the next hop require only the destination prefix and the next-hop IPv6 address.

Adım Adım Çözüm

1
Evaluate link-local next-hop static route requirements in Cisco IOS.
Link-local addresses (fe80::/10\text{fe80}::/10) are scoped only to a single link. Therefore, Cisco IOS requires specifying the local exit interface alongside the link-local next-hop address.
Without specifying the exit interface, the router cannot determine which physical link to forward the packet out of.
2
Evaluate global unicast next-hop static route requirements in Cisco IOS.
Global unicast addresses are globally unique, allowing the router to perform a recursive routing table lookup to find the egress interface.
Specifying only the global unicast next-hop address creates a valid recursive static route.

Anahtar Kavram

IPv6 Static Route Next-Hop Syntax Rules
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Konular

IPv6 Static Routing

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