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Zorluk: OrtaIPv6 Static Routing

A network engineer is configuring a backup floating IPv6 static route on router R1 toward destination prefix 2001:db8:7410:a1::/642001:\text{db8}:7410:\text{a1}::/64. The next-hop router is identified by its link-local address fe80::cafe:1\text{fe80}::\text{cafe}:1 over local interface GigabitEthernet0/0/0\text{GigabitEthernet0/0/0}. The route must be configured with an administrative distance of 140140. Fill in the missing parameters in the command snippet below.

Cevap:R1(config)# ipv6 route 2001:db8:7410:a1::/64 【GigabitEthernet0/0/0】 fe80::cafe:1 【140】

Cevap

The first blank requires specifying the local exit interface GigabitEthernet0/0/0, and the second blank requires the administrative distance value of 140.
When configuring an IPv6 static route using a link-local address as the next-hop, Cisco IOS strictly requires the explicit specification of the local exit interface. The syntax is 'ipv6 route <prefix/mask> <exit-interface> <link-local-address> [AD]'. Therefore, the first blank requires the local interface GigabitEthernet0/0/0, and the second blank requires the administrative distance of 140.

Adım Adım Çözüm

1
Identify the mandatory components of a fully-specified IPv6 static route using a link-local address.
When a link-local address (fe80::/10) is used as the next-hop IPv6 address, the exit interface must be specified because link-local addresses are only unique to the local link.
Without an exit interface, Cisco IOS cannot resolve which interface to send traffic out of when using a link-local address.
2
Determine the position of the exit interface parameter in the command syntax.
The correct command syntax is: ipv6 route <destination-prefix/prefix-length> <exit-interface> <link-local-next-hop> [administrative-distance].
The exit interface GigabitEthernet0/0/0 fills the position immediately following the destination IPv6 prefix.
3
Identify the position of the floating administrative distance parameter.
The administrative distance value of 140 is placed at the end of the command string.
Setting an administrative distance higher than the default static route distance of 1 makes this route a floating static backup route.

Anahtar Kavram

IPv6 Static Route Syntax with Link-Local Next-Hop and Administrative Distance
Tahmini Süre:1m 30s
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Konular

IPv6 Static Routing

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