IPv6 Static Routing

49 soru

Soru 1Soru

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.

Aşağıdaki boşlukları doldurun

R1(config)# ipv6 route 2001:db8:7410:a1::/64 fe80::cafe:1
Cevabı ve açıklamayı göster

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
Soru 2Soru

A network operations engineer is provisioning IPv6 static routing on router Edge-Rtr. The design requirements specify:
1. All default traffic must be forwarded to the primary service provider gateway at global unicast address 2001:db8:1000:1::12001:\text{db8}:1000:1::1.
2. A backup static route for internal network 2001:db8:abc:10::/642001:\text{db8}:\text{abc}:10::/64 must direct traffic to link-local next-hop address fe80::2\text{fe80}::2 across exit interface GigabitEthernet0/0/1, functioning as a floating route to back up a primary OSPFv3 route (administrative distance 110).

Which TWO Cisco IOS configuration commands correctly fulfill these requirements?

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: ipv6 route ::/0 2001:db8:1000:1::1; ipv6 route 2001:db8:abc:10::/64 GigabitEthernet0/0/1 fe80::2 120

Cevap

The correct commands are 'ipv6 route ::/0 2001:db8:1000:1::1' for default routing to the global unicast address, and 'ipv6 route 2001:db8:abc:10::/64 GigabitEthernet0/0/1 fe80::2 120' for the fully-specified floating static route.
The command configuring the default prefix '::/0' to the global unicast address correctly establishes default forwarding. The command referencing prefix '2001:db8:abc:10::/64' with interface 'GigabitEthernet0/0/1', link-local address 'fe80::2', and administrative distance '120' correctly satisfies all syntax rules for link-local next hops and floating route precedence.

Adım Adım Çözüm

1
Identify the proper prefix and syntax for an IPv6 default static route.
The IPv6 default route prefix is ::/0::/0. When using a global unicast next hop, specifying an exit interface is optional.
Global unicast addresses are globally reachable and routable without explicit interface disambiguation.
2
Identify the mandatory syntax requirements when using an IPv6 link-local address as a next-hop.
Because link-local addresses (FE80::/10) are non-routable outside their local link, Cisco IOS requires specifying the local outbound exit interface along with the link-local next-hop address.
Without specifying the exit interface, the router cannot determine which local interface connects to the target link-local neighbor.
3
Evaluate the administrative distance requirement for floating static routes.
The floating static route must have an administrative distance greater than the active route protocol (OSPFv3 AD = 110), so an AD of 120 is required.
Routes with lower administrative distance values take priority in the routing table.

Anahtar Kavram

IPv6 static route configuration syntax, link-local next-hop requirements, and floating static route administrative distance manipulation.
Soru 3Soru

A network administrator needs to configure a static route on router R1 to reach the destination subnet 2001:db8:fed:10::/642001:\text{db8}:\text{fed}:10::/64. The next-hop router's interface uses the link-local IPv6 address fe80::2\text{fe80}::2 across the local GigabitEthernet0/0/1 point-to-point link. Which command must be entered on R1 to properly establish this route?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:fed:10::/64 GigabitEthernet0/0/1 fe80::2

Cevap

The command 'ipv6 route 2001:db8:fed:10::/64 GigabitEthernet0/0/1 fe80::2' is the correct configuration.
When configuring an IPv6 static route using a link-local address as the next hop, Cisco IOS requires a fully specified route syntax containing both the local exit interface and the link-local address in the format: 'ipv6 route <prefix/mask> <exit-interface> <link-local-address>'. The option specifying 'GigabitEthernet0/0/1' followed by 'fe80::2' accurately matches this syntax requirement.

Adım Adım Çözüm

1
Identify the target destination prefix and prefix length
Destination prefix is 2001:db8:fed:10::/642001:\text{db8}:\text{fed}:10::/64.
Static routing commands start with the target network prefix and mask length.
2
Evaluate the next-hop address type
The next-hop address fe80::2\text{fe80}::2 is a link-local IPv6 address (FE80::/10 range).
Link-local addresses are non-routable and scoped strictly to a single link segment.
3
Apply Cisco IOS fully specified IPv6 static route syntax rules
The required command format is 'ipv6 route <prefix/mask> <exit-interface> <link-local-next-hop>'.
Specifying the exit interface GigabitEthernet0/0/1 before the link-local address fe80::2\text{fe80}::2 resolves interface ambiguity.

Anahtar Kavram

Fully specified IPv6 static routes with link-local next-hop addresses
Soru 4Soru

A network administrator is establishing a backup default route on a Cisco IOS router. The primary default route is currently learned dynamically via OSPFv3 with an administrative distance of 110. The administrator wants to ensure that the backup path towards the next-hop global unicast address 2001:db8:200::2 is used only if the primary OSPFv3 route fails. Which command correctly achieves this objective?

Cevabı ve açıklamayı göster

Cevap: ipv6 route ::/0 2001:db8:200::2 130

Cevap

ipv6 route ::/0 2001:db8:200::2 130
The correct command uses the IPv6 default route prefix ::/0, targets the global unicast next-hop address, and assigns an administrative distance of 130 (which is greater than OSPFv3's AD of 110), successfully floating the route until the primary path fails.

Adım Adım Çözüm

1
Identify the IPv6 default route prefix notation.
The IPv6 default route representation is ::/0.
IPv6 default routes represent all possible destination IPv6 networks using the all-zeros prefix with a length of zero.
2
Determine the required administrative distance for a floating static route.
Set an administrative distance higher than 110 (e.g., 130).
A floating static route must have an administrative distance higher than the primary routing protocol (OSPFv3 AD = 110) so it remains inactive until the primary route fails.
3
Validate next-hop addressing syntax in Cisco IOS.
Using global unicast address 2001:db8:200::2 directly is valid, whereas link-local next hops mandatory require an exit interface parameter.
Cisco IOS requires explicit interface designation only when using link-local IPv6 addresses as next hops.

Anahtar Kavram

Floating IPv6 Static Default Route Configuration
Soru 5Soru

An engineer needs to configure a static route on a Cisco router to forward traffic destined for 2001:db8:a:10::/642001:\text{db8}:\text{a}:10::/64. The route must use the next-hop router's link-local address fe80::211:25ff:feab:1234\text{fe80}::211:25\text{ff}:\text{feab}:1234 via the local interface GigabitEthernet0/1. Which command correctly configures this IPv6 static route?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:a:10::/64 GigabitEthernet0/1 fe80::211:25ff:feab:1234

Cevap

ipv6 route 2001:db8:a:10::/64 GigabitEthernet0/1 fe80::211:25ff:feab:1234
The command 'ipv6 route 2001:db8:a:10::/64 GigabitEthernet0/1 fe80::211:25ff:feab:1234' is correct because configuring an IPv6 static route with a link-local next-hop address requires a fully specified route configuration that explicitly specifies the local exit interface prior to the link-local next-hop address.

Adım Adım Çözüm

1
Identify the proper command syntax for IPv6 static routing.
The configuration must use the global configuration command starting with 'ipv6 route' followed by the target destination prefix and prefix length (2001:db8:a:10::/64).
Cisco IOS differentiates IPv4 and IPv6 static routes by requiring the 'ipv6 route' keyword for IPv6.
2
Determine the required parameters for a link-local next-hop address.
Because the next-hop is a link-local address (fe80::/10), the command must explicitly include both the exit interface (GigabitEthernet0/1) and the link-local address (fe80::211:25ff:feab:1234).
Link-local addresses are only valid on a specific physical link. Without the local exit interface context, the router cannot determine which outgoing interface to use to reach the next-hop.

Anahtar Kavram

Fully Specified IPv6 Static Route
Tahmini Süre:1m 0s
Soru 6Soru

A network engineer needs to configure an IPv6 static route on router R1 to forward traffic destined for remote subnet 2001:db8:acad:50::/642001:\text{db8}:\text{acad}:50::/64. The next-hop router's link-local address is fe80::fe54:99ff:fe12:34ab\text{fe80::fe54:99ff:fe12:34ab} via local interface GigabitEthernet0/0/2. Complete the Cisco IOS command below by filling in the exit interface and the next-hop address.

Aşağıdaki boşlukları doldurun

R1(config)# ipv6 route 2001:db8:acad:50::/64
Cevabı ve açıklamayı göster

Cevap

The missing command parameters are GigabitEthernet0/0/2 for the local exit interface (blank 1) and fe80::fe54:99ff:fe12:34ab for the link-local next-hop IPv6 address (blank 2).
When configuring an IPv6 static route using a link-local IPv6 address as the next hop, Cisco IOS requires a fully specified static route syntax where the local exit interface is specified first, followed by the link-local address. Therefore, the first blank requires the exit interface GigabitEthernet0/0/2 and the second blank requires the next-hop link-local address fe80::fe54:99ff:fe12:34ab.

Adım Adım Çözüm

1
Identify the destination network prefix and prefix length.
The target network prefix is 2001:db8:acad:50::/642001:\text{db8}:\text{acad}:50::/64.
This forms the first argument following the `ipv6 route` global configuration command keyword.
2
Determine the requirement for static routes configured with link-local next-hop addresses.
Because link-local addresses (fe80::/10\text{fe80::/10}) are only unique per link, Cisco IOS requires the local exit interface to be explicitly specified preceding the link-local address.
Without specifying the local exit interface, the router cannot determine which local interface to send packets out to reach the non-unique link-local address.
3
Assemble the complete IPv6 static route command string in Cisco IOS order.
`ipv6 route 2001:db8:acad:50::/64 GigabitEthernet0/0/2 fe80::fe54:99ff:fe12:34ab`
This populates GigabitEthernet0/0/2 as the first blank and fe80::fe54:99ff:fe12:34ab as the second blank.

Anahtar Kavram

Fully specified IPv6 static route syntax using a link-local next-hop address and local outbound interface.
Soru 7Soru

A network engineer is configuring a static route on router R1 to reach remote network 2001:db8:c0ff:20::/642001:\text{db8}:\text{c0ff}:20::/64. The engineer intends to forward traffic to the neighboring router using its link-local address fe80::215:c5ff:feab:3102\text{fe80}::215:c5ff:\text{feab}:3102 through R1's local interface GigabitEthernet0/0/1. Which Cisco IOS command successfully accomplishes this configuration?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:c0ff:20::/64 GigabitEthernet0/0/1 fe80::215:c5ff:feab:3102

Cevap

The command specifying 'ipv6 route 2001:db8:c0ff:20::/64 GigabitEthernet0/0/1 fe80::215:c5ff:feab:3102' is the correct configuration.
The correct command follows exact Cisco IOS syntax for a fully specified static route: 'ipv6 route <prefix/mask> <exit-interface> <link-local-address>'. Because link-local IPv6 addresses are only significant on the local link, Cisco IOS requires the exit interface to be explicitly named.

Adım Adım Çözüm

1
Identify the global configuration command syntax for IPv6 static routing.
The correct base command is 'ipv6 route <destination-prefix/prefix-length>'.
IPv6 routing commands use the 'ipv6' prefix rather than 'ip'.
2
Determine the mandatory parameters for link-local next-hop addresses.
A local exit interface must be included alongside the link-local address (fully specified static route).
Link-local addresses (fe80::/10) are link-scoped; without an exit interface, the router cannot determine which link to send packets out on.
3
Assemble the complete Cisco IOS command.
'ipv6 route 2001:db8:c0ff:20::/64 GigabitEthernet0/0/1 fe80::215:c5ff:feab:3102'
This places the destination network, local exit interface, and link-local next-hop in exact positional order.

Anahtar Kavram

Fully specified IPv6 static route requiring local exit interface when using link-local next-hop
Soru 8Soru

A network administrator needs to configure a fully specified IPv6 static route on a Cisco router to reach the remote network 2001:DB8:ACAD:1::/642001:\text{DB8}:\text{ACAD}:1::/64 using the neighbor router's link-local address FE80::2\text{FE80}::2 reachable via the local GigabitEthernet0/1\text{GigabitEthernet0/1} interface. Which command correctly configures this route?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:DB8:ACAD:1::/64 GigabitEthernet0/1 FE80::2

Cevap

The command 'ipv6 route 2001:DB8:ACAD:1::/64 GigabitEthernet0/1 FE80::2' correctly configures the fully specified IPv6 static route.
When configuring an IPv6 static route using a link-local address as the next-hop, Cisco IOS mandates a fully specified route that includes both the local exit interface and the link-local address of the adjacent router.

Adım Adım Çözüm

1
Identify the mandatory components of an IPv6 static route command with a link-local next hop.
The general syntax requires specifying both the local exit interface and the link-local next-hop address: 'ipv6 route <prefix/mask> <exit-interface> <link-local-address>'.
Because IPv6 link-local addresses (FE80::/10) are only unique on a single local link, Cisco IOS cannot determine which outbound interface to use unless the interface is explicitly defined.
2
Evaluate the specified parameters.
Destination prefix = 2001:DB8:ACAD:1::/64, Exit interface = GigabitEthernet0/1, Next-hop = FE80::2.
Combining these exact parameters in order produces a valid fully specified static route configuration.

Anahtar Kavram

Fully specified IPv6 static routes requiring both an exit interface and link-local next-hop address.
Soru 9Soru

What prefix and prefix length parameter completes the Cisco IOS command to configure a default IPv6 static route pointing to next-hop address $2001:

\text{db8}:1::2$?

Aşağıdaki boşlukları doldurun

Router(config)# ipv6 route 2001:db8:1::2
Cevabı ve açıklamayı göster

Cevap

The correct notation to represent a default route in IPv6 static routing is ::/0.
In IPv6 static routing, ::/0 is the prefix notation for a default route, serving the same function as 0.0.0.0/0 in IPv4.

Adım Adım Çözüm

1
Identify the network prefix used to match all possible IPv6 destinations.
The default IPv6 route prefix is written as ::/0.
In IPv6 addressing, :: represents all zeros, and /0 indicates a prefix length of zero bits, matching any destination address.
2
Substitute the default prefix into the Cisco IOS IPv6 static routing command syntax.
The completed command is 'ipv6 route ::/0 2001:db8:1::2'.
The standard command syntax requires 'ipv6 route <destination-prefix/prefix-length> <next-hop-address>'.

Anahtar Kavram

IPv6 Default Static Route Configuration
Tahmini Süre:45s
Soru 10Soru

A network administrator needs to configure an IPv6 static route on a Cisco IOS router to reach the destination prefix 2001:db8:1:10::/642001:\text{db8}:1:10::/64. Which of the following commands represent valid IPv6 static route configurations? (Select TWO.)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:1:10::/64 2001:db8:1:1::2; ipv6 route 2001:db8:1:10::/64 GigabitEthernet0/0 fe80::1

Cevap

The valid IPv6 static route commands are 'ipv6 route 2001:db8:1:10::/64 2001:db8:1:1::2' (directly specifying a global unicast next-hop) and 'ipv6 route 2001:db8:1:10::/64 GigabitEthernet0/0 fe80::1' (fully specifying both the exit interface and the link-local next-hop address).
Valid Cisco IOS IPv6 static route configurations require the 'ipv6 route' keyword followed by the destination prefix. The next hop may be specified either as a global unicast IPv6 address directly, or as a link-local IPv6 address provided that the local exit interface is also explicitly specified.

Adım Adım Çözüm

1
Verify correct command prefix keyword for IPv6 static routing
Cisco IOS requires 'ipv6 route' rather than 'ip route'.
The 'ip route' command is strictly used for configuring IPv4 static routes.
2
Evaluate next-hop syntax with global unicast addresses
A global unicast IPv6 address can be configured directly as a next hop without specifying an exit interface.
Global unicast addresses are globally unique and routable across network interfaces.
3
Evaluate next-hop syntax with link-local addresses
A link-local next-hop address (fe80::/10) requires specifying the local exit interface alongside the address.
Link-local addresses are only valid on their specific local link, making the command ambiguous to the router if the exit interface is omitted.

Anahtar Kavram

IPv6 Static Route Command Syntax and Link-Local Next-Hop Requirements
Soru 11Soru

A network administrator needs to configure a static route on a Cisco router to reach destination network 2001:DB8:ABCD:10::/642001:\text{DB8}:\text{ABCD}:10::/64. The adjacent router's link-local address is FE80::2:1\text{FE80}::2:1 and the local outbound interface is GigabitEthernet0/0. Which Cisco IOS command correctly configures this IPv6 static route?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:DB8:ABCD:10::/64 GigabitEthernet0/0 FE80::2:1

Cevap

The command 'ipv6 route 2001:DB8:ABCD:10::/64 GigabitEthernet0/0 FE80::2:1' correctly configures the static route.
When configuring an IPv6 static route using a link-local next-hop address, Cisco IOS requires specifying the local exit interface because link-local addresses are ambiguous and exist on every interface. The correct syntax specifies the exit interface followed by the link-local address.

Adım Adım Çözüm

1
Identify destination prefix and next-hop type
Destination prefix is 2001:DB8:ABCD:10::/642001:\text{DB8}:\text{ABCD}:10::/64, and next-hop is link-local FE80::2:1\text{FE80}::2:1.
Link-local addresses are non-routable outside the local link segment.
2
Apply Cisco IOS fully specified static route rule
Because link-local addresses are ambiguous across multiple interfaces, the exit interface GigabitEthernet0/0 must be included before the next-hop address.
Cisco IOS requires syntax: `ipv6 route <prefix/mask> <exit-interface> <next-hop-address>` when using link-local addresses.

Anahtar Kavram

Fully Specified IPv6 Static Route Syntax using Link-Local Next-Hop
Tahmini Süre:45s
Soru 12Soru

A network administrator is configuring static routing on router R1 to forward traffic to the destination network 2001:DB8:CAFE:5::/642001:\text{DB8}:\text{CAFE}:5::/64. The egress interface on R1 is GigabitEthernet0/0/0, which connects directly to router R2. Router R2's connected interface has a global unicast address of 2001:DB8:LAB:1::2/642001:\text{DB8}:\text{LAB}:1::2/64 and a link-local address of FE80::2\text{FE80}::2. Which command correctly configures a static route on R1 using R2's link-local address as the next hop?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:DB8:CAFE:5::/64 GigabitEthernet0/0/0 FE80::2

Cevap

The command 'ipv6 route 2001:DB8:CAFE:5::/64 GigabitEthernet0/0/0 FE80::2' correctly specifies both the local exit interface and the neighbor's link-local next-hop address.
In Cisco IOS, IPv6 static routes using a link-local address as the next-hop MUST be fully specified by including both the local exit interface and the neighbor's link-local IPv6 address. The command specifying both GigabitEthernet0/0/0 and FE80::2 meets this requirement.

Adım Adım Çözüm

1
Identify the destination prefix and prefix length.
The target destination network is 2001:DB8:CAFE:5::/642001:\text{DB8}:\text{CAFE}:5::/64.
The first argument of an IPv6 static route in Cisco IOS is always the destination IPv6 prefix/prefix-length.
2
Determine the next-hop requirements when using a link-local address.
Link-local addresses (FE80::/10) are bound strictly to a specific link (interface).
Because the same link-local address can exist on multiple interfaces of the same router, the router cannot determine which egress interface to use unless the exit interface is explicitly stated in the command.
3
Construct the complete fully specified IPv6 static route command.
'ipv6 route 2001:DB8:CAFE:5::/64 GigabitEthernet0/0/0 FE80::2'
This includes the destination prefix, the local interface (GigabitEthernet0/0/0), and the neighbor's link-local address (FE80::2).

Anahtar Kavram

IPv6 Static Route Link-Local Next-Hop Syntax Requirement
Tahmini Süre:1m 30s
Soru 13Soru

A network administrator needs to configure a static IPv6 route on a Cisco router to reach the destination network 2001:db8:acad:1::/64 using the next-hop router's link-local address fe80::1 via local interface GigabitEthernet0/0/1. Which Cisco IOS command correctly accomplishes this configuration?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:acad:1::/64 GigabitEthernet0/0/1 fe80::1

Cevap

The command 'ipv6 route 2001:db8:acad:1::/64 GigabitEthernet0/0/1 fe80::1' correctly configures the IPv6 static route using a link-local address with the mandatory local exit interface.
The correct command specifies 'ipv6 route' followed by the target IPv6 network prefix/length (2001:db8:acad:1::/64), the local exit interface (GigabitEthernet0/0/1), and the next-hop link-local address (fe80::1). In Cisco IOS, link-local addresses cannot be used as static route next-hops without identifying the local exit interface.

Adım Adım Çözüm

1
Identify the destination IPv6 prefix and length
Destination prefix is 2001:db8:acad:1::/64.
IPv6 static routes require CIDR prefix notation (/64).
2
Evaluate next-hop address requirements
The next-hop address fe80::1 is a link-local address.
Link-local addresses (fe80::/10 range) are non-global and exist on every interface, making them ambiguous to the routing table without an exit interface context.
3
Formulate the correct Cisco IOS IPv6 static route command syntax
Command format: ipv6 route <destination-prefix/mask> <exit-interface> <link-local-next-hop>
Cisco IOS requires both the local exit interface and the link-local next-hop address for fully specified static routes using link-local next-hops.

Anahtar Kavram

Fully specified IPv6 static routes using link-local next-hop addresses
Soru 14Soru

Complete the Cisco IOS command by entering the missing administrative distance value to configure a floating static route.

Aşağıdaki boşlukları doldurun

An engineer is configuring a backup IPv6 static route to network 2001:db8:40::/64 via next-hop 2001:db8:10::2. The route must remain inactive in the routing table unless the primary OSPFv3 route (administrative distance 110) fails.

Complete the command below by filling in a valid administrative distance value in
:

`Router(config)# ipv6 route 2001:db8:40::/64 2001:db8:10::2
`
Cevabı ve açıklamayı göster

Cevap

Any integer from 111 through 254 (for example, 130) that is greater than the OSPFv3 administrative distance of 110.
A floating static route requires an Administrative Distance (AD) higher than the routing protocol it backs up. Since OSPFv3 has a default AD of 110, any integer value between 111 and 254 (such as 120, 130, or 150) placed at the end of the `ipv6 route` command correctly configures the floating static route.

Adım Adım Çözüm

1
Identify the primary route's Administrative Distance (AD).
The primary route uses OSPFv3, which has a default AD of 110.
Floating static routes rely on a higher AD than the active routing protocol so they are only installed when the primary route fails.
2
Determine the valid range for the floating static route AD.
The AD must be strictly greater than 110 and less than 255 (valid Cisco IOS AD range for static routes is 1–254).
An AD of 255 makes a route unroutable/untrustworthy, while an AD of 110 or less would cause the static route to preempt or equal-cost load-share with OSPFv3.
3
Place the AD parameter in the Cisco IOS IPv6 static route syntax.
The syntax is `ipv6 route <prefix/length> <next-hop> [administrative-distance]`.
The final optional position in the command specifies the administrative distance.

Anahtar Kavram

IPv6 Floating Static Route Administrative Distance Configuration
Soru 15Soru

A network administrator needs to configure a static route on a Cisco router for the destination network 2001:DB8:5::/642001:\text{DB8}:5::/64 using the next-hop router's link-local address FE80::2\text{FE80}::2 reachable via interface GigabitEthernet0/0/1. Which Cisco IOS command correctly configures this route?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:5::/64 GigabitEthernet0/0/1 fe80::2

Cevap

The command 'ipv6 route 2001:db8:5::/64 GigabitEthernet0/0/1 fe80::2' correctly configures the static route.
The command specifying 'ipv6 route 2001:db8:5::/64 GigabitEthernet0/0/1 fe80::2' follows the correct Cisco IOS syntax. When using a link-local address as a next hop, specifying the local exit interface before the link-local address is mandatory because link-local addresses are ambiguous across multiple physical links.

Adım Adım Çözüm

1
Identify the proper command keyword for IPv6 static routes.
Use 'ipv6 route' rather than 'ip route'.
IPv6 routing configurations require the 'ipv6' keyword prefix in Cisco IOS.
2
Specify destination prefix, local exit interface, and link-local next-hop address in order.
Format as 'ipv6 route 2001:db8:5::/64 GigabitEthernet0/0/1 fe80::2'.
Because link-local addresses (FE80::/10) are reused across multiple interfaces, the router cannot determine which exit interface to use unless specified in the command before the next-hop link-local address.

Anahtar Kavram

IPv6 Static Routing with Link-Local Next-Hop
Soru 16Soru

A network engineer is configuring a static route on a Cisco router to reach remote network 2001:db8:3c4d:10::/642001:\text{db8}:3\text{c}4\text{d}:10::/64. The adjacent router's interface uses the link-local IPv6 address fe80::1\text{fe80}::1 and is directly attached to local interface GigabitEthernet0/0/1\text{GigabitEthernet0/0/1}. Which Cisco IOS command correctly establishes this static route?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:3c4d:10::/64 GigabitEthernet0/0/1 fe80::1

Cevap

The command 'ipv6 route 2001:db8:3c4d:10::/64 GigabitEthernet0/0/1 fe80::1' correctly configures the fully specified static route.
When configuring an IPv6 static route using a link-local next-hop address, Cisco IOS requires a fully specified static route that includes both the local exit interface and the link-local next-hop IPv6 address. This is required because link-local IPv6 addresses are only unique on a single link and could be used on multiple interfaces simultaneously.

Adım Adım Çözüm

1
Identify the target IPv6 static routing command keyword and prefix syntax.
IPv6 static routes must begin with 'ipv6 route' followed by the target destination prefix and prefix length (2001:db8:3c4d:10::/642001:\text{db8}:3\text{c}4\text{d}:10::/64).
Cisco IOS requires the explicit 'ipv6 route' keyword for IPv6 routing entries.
2
Determine the requirement for using link-local next-hop addresses.
Because link-local addresses (FE80::/10) are link-specific and can exist on multiple interfaces of the same router, Cisco IOS cannot resolve the exit interface implicitly.
Specifying both the local interface and the link-local next-hop address (fully specified static route) eliminates exit interface ambiguity.

Anahtar Kavram

IPv6 Fully Specified Static Route with Link-Local Next-Hop
Soru 17Soru

A network administrator needs to configure an IPv6 static route on a Cisco IOS router for the destination network 2001:db8:acad:10::/642001:\text{db8}:\text{acad}:10::/64. The next-hop router's link-local IPv6 address is fe80::1\text{fe80}::1, and the local exit interface is GigabitEthernet0/0/1. Which Cisco IOS command correctly configures this static route?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::1

Cevap

The command 'ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::1' correctly configures the static route.
When pointing an IPv6 static route to a link-local next-hop address, Cisco IOS requires both the outbound exit interface and the next-hop IPv6 address to be specified. The syntax 'ipv6 route <destination-prefix> <exit-interface> <link-local-address>' satisfies this requirement.

Adım Adım Çözüm

1
Identify the destination prefix and mask
The target network is 2001:db8:acad:10::/64.
Static routes in Cisco IOS require the destination network prefix first.
2
Evaluate the requirements for using a link-local next-hop address
Link-local addresses (fe80::/10) are ambiguous because they exist on every interface.
Cisco IOS requires specifying the exit interface along with the link-local next-hop address.
3
Construct the exact Cisco IOS IPv6 static route command syntax
ipv6 route 2001:db8:acad:10::/64 GigabitEthernet0/0/1 fe80::1
The correct format is 'ipv6 route <prefix/length> <exit-interface> <next-hop-address>'.

Anahtar Kavram

IPv6 Static Route Link-Local Next-Hop Configuration
Soru 18Soru

A network engineer is configuring static routes on a Cisco IOS router to establish reachability to remote networks. Which TWO commands represent syntactically valid IPv6 static route configurations?

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:acad:2::/64 gigabitethernet 0/0/0 fe80::1; ipv6 route 2001:db8:acad:3::/64 2001:db8:acad:1::2 130

Cevap

The syntactically valid IPv6 static route configurations are the fully specified route specifying both GigabitEthernet 0/0/0 and next-hop link-local address fe80::1, and the floating static route specifying the global unicast next-hop 2001:db8:acad:1::2 with an administrative distance of 130.
The command specifying both the exit interface GigabitEthernet 0/0/0 and the link-local next-hop address fe80::1 is valid because link-local addresses require an exit interface to define the link scope. The command specifying destination network 2001:db8:acad:3::/64 with global unicast next-hop 2001:db8:acad:1::2 and administrative distance 130 is also valid for configuring a floating static route.

Adım Adım Çözüm

1
Evaluate the link-local next-hop static route syntax requirements.
Link-local addresses (fe80::/10) require an exit interface to be specified because link-local addresses are only unique to a given link.
Cisco IOS cannot resolve an egress interface solely from a link-local next-hop address.
2
Evaluate global unicast static route syntax and administrative distance positioning.
Global unicast next-hop static routes can be configured with an optional administrative distance parameter at the end of the command.
Setting an administrative distance higher than dynamic routing protocols creates a backup or floating static route.

Anahtar Kavram

IPv6 Static Route Syntax Rules for Link-Local and Global Unicast Next Hops
Soru 19Soru

A Cisco router currently learns the active route to destination network 2001:DB8:ACAD:20::/642001:\text{DB8}:\text{ACAD}:20::/64 via OSPFv3 with an administrative distance of 110. An engineer must configure a backup floating static IPv6 route to this remote network. The backup path uses the next-hop router's link-local IPv6 address FE80::2\text{FE80}::2 through the local interface GigabitEthernet0/0/1\text{GigabitEthernet0/0/1}. Which command correctly configures this floating static IPv6 route on the Cisco IOS router?

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:acad:20::/64 GigabitEthernet0/0/1 fe80::2 120

Cevap

The command 'ipv6 route 2001:db8:acad:20::/64 GigabitEthernet0/0/1 fe80::2 120' correctly configures the fully specified floating static IPv6 route.
The correct command fully specifies the exit interface alongside the link-local next-hop IPv6 address and sets an administrative distance of 120. In IPv6 static routing, specifying a link-local address as a next hop requires the local exit interface (GigabitEthernet0/0/1). Additionally, configuring an administrative distance greater than OSPFv3's default distance of 110 ensures the static route remains dormant in the routing table until the primary OSPFv3 route fails.

Adım Adım Çözüm

1
Identify the requirements for using a link-local IPv6 address as a static route next hop.
Because link-local addresses (FE80::/10) are ambiguous without a scope, Cisco IOS requires fully specified static routes that include both the local exit interface and the link-local next-hop address.
Without the local interface parameter, the router cannot determine which outgoing interface to send traffic to reach the link-local neighbor.
2
Determine the necessary Administrative Distance (AD) for a floating static route.
The AD must be strictly greater than the AD of the primary routing protocol (OSPFv3 default AD is 110). An AD value of 120 is higher than 110.
A floating static route remains inactive in the routing table until the primary route with a lower administrative distance fails.
3
Assemble the complete Cisco IOS IPv6 static route command syntax.
The correct command format is 'ipv6 route <destination-prefix/mask> <exit-interface> <next-hop-link-local-address> <administrative-distance>'.
This guarantees correct forwarding interface binding and proper floating route administrative distance operation.

Anahtar Kavram

IPv6 Fully Specified Floating Static Route Configuration
Soru 20Soru

A network administrator is configuring IPv6 static routing on router R1 to reach network 2001:db8:89ab:10::/642001:\text{db8}:89\text{ab}:10::/64. The directly connected neighbor router interface is configured with global unicast address 2001:db8:1234:1::22001:\text{db8}:1234:1::2 and link-local address fe80::2\text{fe80}::2. Router R1 uses local interface GigabitEthernet0/1 to reach this neighbor. Which TWO Cisco IOS commands represent valid IPv6 static route configurations on R1?

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: ipv6 route 2001:db8:89ab:10::/64 GigabitEthernet0/1 fe80::2; ipv6 route 2001:db8:89ab:10::/64 2001:db8:1234:1::2

Cevap

The two valid Cisco IOS static route commands are 'ipv6 route 2001:db8:89ab:10::/64 GigabitEthernet0/1 fe80::2' and 'ipv6 route 2001:db8:89ab:10::/64 2001:db8:1234:1::2'.
In Cisco IOS, IPv6 static routes configured with a link-local address as the next hop MUST include the local egress interface (fully specified route). Alternatively, a global unicast next-hop address can be configured directly without an egress interface specified.

Adım Adım Çözüm

1
Identify valid next-hop options for Cisco IOS IPv6 static routes
IPv6 static routes can use a global unicast next-hop address alone, an outbound local interface with a global unicast address, or a fully specified combination of local exit interface and link-local next-hop address.
Link-local addresses have link-local scope and exist on multiple interfaces simultaneously, making the exit interface strictly mandatory when using link-local next hops.
2
Evaluate the option using local exit interface and link-local address
The command specifying GigabitEthernet0/1 alongside link-local address fe80::2 is valid.
It fulfills the mandatory requirement of declaring the local egress interface when referencing link-local IPv6 addresses.
3
Evaluate the option using global unicast next-hop address
The command specifying next-hop global unicast address 2001:db8:1234:1::2 is valid.
Global unicast addresses are globally unique and routable without explicit interface identification.

Anahtar Kavram

IPv6 Static Route Next-Hop Requirements
Sayfa 1 / 3Sonraki