Tüm alıştırma soruları

22 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 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 3Soru

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 4Soru

A router learns the destination network 10.20.30.0/2410.20.30.0/24 dynamically via RIPv2 with a default Administrative Distance of 120120. A network engineer needs to configure a floating static backup route for this network via next-hop IP address 192.168.12.2192.168.12.2. The backup route must only enter the routing table if the primary RIP route fails. Complete the Cisco IOS configuration command to assign an Administrative Distance of 130130 to the floating static route.

Aşağıdaki boşlukları doldurun

Router(config)# ip route 10.20.30.0 255.255.255.0 192.168.12.2
Cevabı ve açıklamayı göster

Cevap

130
A floating static route serves as a backup path and must be configured with an Administrative Distance (AD) strictly higher than that of the primary route. Since RIPv2 has a default AD of 120, specifying 130 as the trailing metric in the 'ip route' command ensures that the static route remains out of the routing table until the RIP route fails.

Adım Adım Çözüm

1
Identify the Administrative Distance (AD) of the primary dynamic routing protocol.
RIPv2 has a default Administrative Distance of 120.
Routing decisions prioritize routes with lower Administrative Distance values.
2
Determine the required Administrative Distance for the backup floating static route.
The backup route must have an AD greater than 120 (specifically 130 as requested).
A higher AD keeps the static route inactive (floating) in the routing table as long as the primary route is active.
3
Complete the Cisco IOS command by appending the administrative distance integer at the end.
The trailing argument in 'ip route 10.20.30.0 255.255.255.0 192.168.12.2 130' sets the AD to 130.
In Cisco IOS syntax, an optional integer at the end of the 'ip route' command overrides the default static route AD of 1.

Anahtar Kavram

Floating Static Route Administrative Distance Configuration
Tahmini Süre:1m 0s
Soru 5Soru

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 6Soru

A network engineer needs to manually configure a backup route on Router R1 toward the remote prefix 2001:db8:cafe:40::/642001:\text{db8}:\text{cafe}:40::/64. The primary route to this subnet is learned via OSPFv3 with an administrative distance of 110. The engineer must use the neighboring router's link-local address fe80::250:56ff:fe9a:12ab\text{fe80}::250:56ff:\text{fe9a}:12ab reachable through interface GigabitEthernet0/0/1. What complete Cisco IOS global configuration command must be entered to establish this route as a floating static route with an administrative distance of 130?

Aşağıdaki boşlukları doldurun

R1(config)#
Cevabı ve açıklamayı göster

Cevap

The complete command required is 'ipv6 route 2001:db8:cafe:40::/64 GigabitEthernet0/0/1 fe80::250:56ff:fe9a:12ab 130'.
To route IPv6 traffic using a link-local address (FE80::/10) as the next hop, Cisco IOS requires a fully specified static route syntax that defines the local exit interface followed by the link-local address. Without specifying the exit interface, the router cannot determine which local physical or logical link reaches that link-local address. Additionally, appending the administrative distance value 130 ensures the static route remains inactive in the routing table until the primary OSPFv3 route (AD 110) fails.

Adım Adım Çözüm

1
Identify the base global configuration command for IPv6 static routing.
The command structure starts with 'ipv6 route'.
Cisco IOS requires 'ipv6 route' in global configuration mode to declare static routes for IPv6.
2
Append the destination IPv6 prefix and prefix-length.
Add '2001:db8:cafe:40::/64' after the command keyword.
Static routing requires specifying the exact destination prefix using CIDR slash notation.
3
Identify the mandatory parameters when utilizing a link-local address as the next hop.
Specify the local exit interface 'GigabitEthernet0/0/1' immediately followed by the link-local address 'fe80::250:56ff:fe9a:12ab'.
Because link-local addresses (FE80::/10) are only unique on a per-link basis, Cisco IOS requires a fully specified static route containing both the outbound interface and the next-hop link-local IP.
4
Set the administrative distance for floating route behavior.
Append '130' at the end of the command.
A primary OSPFv3 route has an administrative distance of 110. To function as a backup floating static route, the static route's administrative distance must be higher than 110.

Anahtar Kavram

Fully Specified IPv6 Floating Static Route Configuration
Soru 7Soru

A network technician is configuring an IPv6 static route on a Cisco router. The destination network is 2001:db8:c0ff:50::/642001:\text{db8}:\text{c0ff}:50::/64. The next-hop router's link-local IPv6 address is fe80::a5\text{fe80}::a5, and traffic must exit via the local interface GigabitEthernet0/0/0. What is the exact, complete Cisco IOS command required to configure this fully specified static route with a custom administrative distance of 130?

Aşağıdaki boşlukları doldurun

Enter the complete Cisco IOS command:
Cevabı ve açıklamayı göster

Cevap

ipv6 route 2001:db8:c0ff:50::/64 GigabitEthernet0/0/0 fe80::a5 130
Configuring an IPv6 static route with a link-local next-hop address requires a fully specified route format: 'ipv6 route <destination-prefix/prefix-length> <exit-interface> <link-local-next-hop> [administrative-distance]'. In this scenario, combining the target prefix '2001:db8:c0ff:50::/64', local exit interface 'GigabitEthernet0/0/0', link-local next-hop 'fe80::a5', and administrative distance '130' results in 'ipv6 route 2001:db8:c0ff:50::/64 GigabitEthernet0/0/0 fe80::a5 130'.

Adım Adım Çözüm

1
Identify the base global configuration command and destination prefix.
The static route command begins with 'ipv6 route' followed by the target IPv6 network prefix and prefix length '2001:db8:c0ff:50::/64'.
Cisco IOS requires the keyword 'ipv6 route' followed immediately by the destination network identifier.
2
Identify the requirement for specifying the local exit interface.
Place 'GigabitEthernet0/0/0' after the destination prefix.
Because link-local addresses (fe80::/10) are scope-local and ambiguous across multiple router interfaces, Cisco IOS requires specifying the exit interface whenever a link-local address is used as a next hop.
3
Append the link-local next-hop address and administrative distance.
Add the link-local next-hop IPv6 address 'fe80::a5' followed by the administrative distance integer '130'.
Completes the syntax for a fully specified IPv6 static route while applying the requested custom administrative distance.

Anahtar Kavram

Fully Specified IPv6 Static Route Configuration
Tahmini Süre:1m 30s
Soru 8Soru

A network administrator needs to configure an IPv6 default static route on a Cisco IOS router pointing to the exit interface GigabitEthernet0/0. Complete the command by specifying the IPv6 default route prefix notation.

Aşağıdaki boşlukları doldurun

ipv6 route GigabitEthernet0/0
Cevabı ve açıklamayı göster

Cevap

The correct prefix notation to complete the IPv6 static default route command is ::/0.
The IPv6 default route prefix is designated as ::/0, which matches all destination networks regardless of prefix length.

Adım Adım Çözüm

1
Identify the IPv6 address representation for a default route.
In IPv6 addressing, all zeros with a prefix length of zero bits is represented using compressed format as ::/0.
The prefix ::/0 matches any IPv6 destination network when no more specific match exists in the routing table.

Anahtar Kavram

IPv6 Default Static Route Syntax
Soru 9Soru

An engineer is configuring a static route on a Cisco router to reach the destination subnet 2001:db8:a100:12::/642001:\text{db8}:\text{a100}:12::/64 using the neighbor link-local address fe80::fe22:1\text{fe80}::\text{fe22}:1 via local interface GigabitEthernet0/1\text{GigabitEthernet0/1}. Complete the Cisco IOS configuration command by filling in the missing parameters in order.

Aşağıdaki boşlukları doldurun

ipv6 route 2001:db8:a100:12::/64
Cevabı ve açıklamayı göster

Cevap

The complete command is: ipv6 route 2001:db8:a100:12::/64 GigabitEthernet0/1 fe80::fe22:1
In Cisco IOS IPv6 static routing, when a link-local address is designated as the next hop, the command must explicitly include the local exit interface preceding the link-local address. Therefore, the first parameter must specify the interface (GigabitEthernet0/1) and the second parameter must specify the link-local address (fe80::fe22:1).

Adım Adım Çözüm

1
Identify the standard Cisco IOS IPv6 static route command structure for link-local next hops.
The command syntax is: ipv6 route <destination-prefix/prefix-length> <exit-interface> <link-local-next-hop>.
Cisco IOS requires specifying the local exit interface when using an IPv6 link-local address as a next hop because link-local addresses are unique only within the scope of a single link.
2
Fill in the required exit interface parameter for the first blank.
blank_1 is GigabitEthernet0/1 (or acceptable interface abbreviation such as gi0/1 or g0/1).
The exit interface specifies which local link to use to resolve the link-local address.
3
Fill in the next-hop IPv6 link-local address for the second blank.
blank_2 is fe80::fe22:1.
The next-hop link-local address follows the exit interface parameter in a fully specified IPv6 static route.

Anahtar Kavram

IPv6 Fully Specified Static Route
Tahmini Süre:1m 15s
Soru 10Soru

An engineer is configuring a backup fully-specified IPv6 static route on router R1 toward the remote destination network 2001:db8:500:10::/642001:\text{db8}:500:10::/64. The primary path is learned via OSPFv3. The backup route must forward traffic to the next-hop router's link-local address fe80::2\text{fe80::2} via local interface GigabitEthernet0/1 with an administrative distance of 130. Complete the required Cisco IOS configuration command.

Aşağıdaki boşlukları doldurun

ipv6 route 2001:db8:500:10::/64 130
Cevabı ve açıklamayı göster

Cevap

The complete command is 'ipv6 route 2001:db8:500:10::/64 GigabitEthernet0/1 fe80::2 130'.
When configuring an IPv6 static route using a link-local next-hop address, Cisco IOS requires a fully specified static route format: `ipv6 route <prefix/length> <exit-interface> <link-local-address> [administrative-distance]`. Thus, GigabitEthernet0/1 must be specified as the exit interface in the first blank, and fe80::2 as the next hop in the second blank.

Adım Adım Çözüm

1
Identify the target IPv6 network prefix and length.
The destination prefix is 2001:db8:500:10::/64.
IPv6 static routes require the destination network prefix with prefix length.
2
Determine the required syntax for using a link-local address as a next hop.
When a link-local address (fe80::2) is specified as the next hop, Cisco IOS requires the local exit interface (GigabitEthernet0/1) to precede the link-local address in the command.
Link-local addresses are only unique to the local link, so the router must know which egress interface to send the traffic out of.
3
Append the administrative distance parameter.
An administrative distance of 130 is placed at the end of the command.
The primary OSPFv3 route has an administrative distance of 110; setting the static route to 130 creates a floating static route.

Anahtar Kavram

IPv6 Fully Specified Static Route and Floating Static Route Syntax
Soru 11Soru

Complete the Cisco IOS command below to configure a floating static route for the 172.16.100.0/22 network using the next-hop address 10.254.1.2. The route must serve as a floating backup to a primary path learned via internal EIGRP. Enter the dotted-decimal subnet mask in the first blank and the minimum integer administrative distance value required for backup operation in the second blank.

Aşağıdaki boşlukları doldurun

ip route 172.16.100.0 10.254.1.2
Cevabı ve açıklamayı göster

Cevap

blank_1: 255.255.252.0, blank_2: 91
To configure a floating static route in Cisco IOS for the 172.16.100.0/22 prefix, the subnet mask must be specified in dotted-decimal format as 255.255.252.0. Internal EIGRP operates with a default Administrative Distance of 90. To ensure the static route acts strictly as a floating backup—entering the routing table only when the primary EIGRP route is lost—the static route must be assigned an Administrative Distance greater than 90. The minimum integer value that achieves this is 91.

Adım Adım Çözüm

1
Convert the CIDR prefix length /22 to a dotted-decimal subnet mask.
A /22 prefix corresponds to 22 contiguous network bits (11111111.11111111.11111100.00000000), which equals 255.255.252.0.
Cisco IOS IPv4 static route syntax requires the subnet mask in dotted-decimal notation.
2
Identify the default Administrative Distance (AD) of internal EIGRP.
Internal EIGRP has a default AD of 90.
A floating static route must have an AD strictly greater than the primary route's AD to remain inactive in the routing table while the primary path is reachable.
3
Calculate the minimum administrative distance for the floating static route.
The minimum integer value greater than 90 is 91.
Assigning an AD of 91 ensures the static route is floating (inactive) relative to EIGRP (AD 90) but activates immediately if the EIGRP route fails.

Anahtar Kavram

Floating Static Route Configuration and Administrative Distance
Tahmini Süre:2m 0s
Soru 12Soru

A network administrator needs to configure a backup floating static route for destination network 10.30.0.0/16 via next-hop IP 192.168.10.2. The primary route to this destination is learned via internal EIGRP, which has a default administrative distance of 90. What is the minimum administrative distance value that must be specified at the end of the command to ensure the route acts as a backup?

Aşağıdaki boşlukları doldurun

`Router(config)# ip route 10.30.0.0 255.255.0.0 192.168.10.2 `
Cevabı ve açıklamayı göster

Cevap

91
To configure a floating static route, the administrative distance (AD) appended to the end of the `ip route` command must be higher than the AD of the primary route. Because internal EIGRP has an administrative distance of 90, the minimum integer value required to make the static route act as a backup is 91.

Adım Adım Çözüm

1
Identify the administrative distance (AD) of the primary routing protocol.
Internal EIGRP has a default Administrative Distance of 90.
Floating static routes rely on administrative distance values to determine route preference in the Cisco IOS routing table.
2
Determine the required administrative distance for the backup static route.
The floating static route must have an AD strictly greater than 90.
A route with a lower AD is always preferred. Standard static routes have a default AD of 1, which would override EIGRP if not changed.
3
Calculate the minimum integer value.
The lowest integer greater than 90 is 91.
Setting the AD to 91 ensures EIGRP is preferred under normal operations while allowing the static route to take over if EIGRP fails.

Anahtar Kavram

Floating Static Route Administrative Distance Configuration
Soru 13Soru

A network administrator needs to configure a secondary floating default route on router Edge-2 toward an upstream ISP. The primary default route is learned dynamically via OSPFv3 with a administrative distance of 110. The backup route must forward all unmatched traffic out local interface GigabitEthernet0/1 to the ISP router's link-local next-hop address fe80::250:56ff:fea1:2b3c using an administrative distance of 130. Complete the global configuration command required on router Edge-2 to create this fully specified floating default static route.

Aşağıdaki boşlukları doldurun

ipv6 route GigabitEthernet0/1 fe80::250:56ff:fea1:2b3c
Cevabı ve açıklamayı göster

Cevap

The first blank requires '::/0' to designate the default IPv6 prefix, and the second blank requires '130' to set the administrative distance for the floating static route.
An IPv6 default static route uses the prefix '::/0'. When using a link-local address (fe80::/10) as a next-hop, Cisco IOS requires specifying the local exit interface alongside the link-local address because link-local addresses are scope-bound to a specific link. To make the static route a floating backup path behind OSPFv3 (AD 110), an administrative distance parameter of 130 is added to the end of the global configuration command syntax: 'ipv6 route <prefix/length> <exit-interface> <next-hop-address> [administrative-distance]'.

Adım Adım Çözüm

1
Identify the destination prefix notation for an IPv6 default static route.
The default route covering all IPv6 destinations is represented by '::/0'.
In IPv6 prefix notation, ::/0 represents all possible IPv6 destinations, equivalent to 0.0.0.0 0.0.0.0 in IPv4.
2
Verify link-local next-hop syntax requirements.
The exit interface GigabitEthernet0/1 precedes the link-local address fe80::250:56ff:fea1:2b3c.
Link-local addresses (fe80::/10) are only unique on the local link segment. Cisco IOS mandates specifying the egress interface when using a link-local address as a next-hop.
3
Determine the administrative distance needed for floating route behavior.
Append '130' to the end of the command.
To float behind an active OSPFv3 route (AD 110), the static route's administrative distance must be higher than 110. The scenario specifies an AD of 130.

Anahtar Kavram

IPv6 Fully Specified Floating Static Default Route Syntax
Tahmini Süre:1m 30s
Soru 14Soru

Fill in the blank with the exact Cisco IOS command needed to configure the specified static route.

Aşağıdaki boşlukları doldurun

To configure a fully specified IPv6 static route for the destination subnet 2001:db8:acad:1::/64 using the outbound interface GigabitEthernet0/1 and the next-hop link-local address fe80::1, enter the command:
Cevabı ve açıklamayı göster

Cevap

ipv6 route 2001:db8:acad:1::/64 GigabitEthernet0/1 fe80::1
When specifying an IPv6 link-local address as the next-hop, Cisco IOS requires a fully specified static route where both the local outbound interface and the neighbor's link-local IPv6 address are declared.

Adım Adım Çözüm

1
Identify the target network prefix and length.
Destination network prefix is 2001:db8:acad:1::/64.
Static routing in IPv6 requires specifying the target prefix alongside its prefix length.
2
Determine the interface and next-hop address requirement for link-local routing.
Exit interface is GigabitEthernet0/1 and link-local next-hop address is fe80::1.
Because link-local addresses (fe80::/10) are only unique to a local link, Cisco IOS requires specifying the exit interface along with the link-local next-hop address to form a fully specified static route.
3
Assemble the complete global configuration mode command syntax.
ipv6 route 2001:db8:acad:1::/64 GigabitEthernet0/1 fe80::1
The correct command syntax in Cisco IOS is 'ipv6 route <prefix/length> <exit-interface> <next-hop-link-local-address>'.

Anahtar Kavram

IPv6 Fully Specified Static Route Syntax
Soru 15Soru

You are configuring a secondary gateway path on a corporate router for destination subnet 192.168.88.0/24 via next-hop IP address 10.5.5.2. The primary active route is learned dynamically via OSPF, which carries a default administrative distance of 110. What is the lowest administrative distance integer value that must be assigned at the end of the CLI command to ensure this static route functions as a floating backup route?

Aşağıdaki boşlukları doldurun

ip route 192.168.88.0 255.255.255.0 10.5.5.2
Cevabı ve açıklamayı göster

Cevap

111
A floating static route acts as a backup path and only enters the routing table when the primary routing path fails. Because Cisco routers prefer routes with lower administrative distance values, a floating static route must have an administrative distance higher than the primary route protocol. Since OSPF has a default administrative distance of 110, the lowest integer value that makes the static route floating is 111.

Adım Adım Çözüm

1
Identify the administrative distance of the primary route.
The primary route is learned via OSPF, which has a default administrative distance of 110.
Cisco routers use administrative distance to rank route trustworthiness, preferring lower values.
2
Determine the minimum administrative distance required for a floating static backup route.
To ensure the static route remains inactive while OSPF is operational, its administrative distance must be strictly greater than 110.
The lowest integer greater than 110 is 111.

Anahtar Kavram

Floating Static Route Administrative Distance Selection
Tahmini Süre:45s
Soru 16Soru

Complete the Cisco IOS command below to configure a floating static route for destination network 10.40.15.0/2410.40.15.0/24 using next-hop IP address 192.168.254.2192.168.254.2 to serve as a backup for a primary route learned via Internal EIGRP (Administrative Distance 90), specifying an administrative distance of 130130.

Aşağıdaki boşlukları doldurun

Router(config)# ip route 10.40.15.0 255.255.255.0
Cevabı ve açıklamayı göster

Cevap

The completed Cisco IOS configuration command is `ip route 10.40.15.0 255.255.255.0 192.168.254.2 130`.
In Cisco IOS, the syntax for a static route is `ip route <prefix> <mask> <next-hop-ip> [administrative_distance]`. Specifying `192.168.254.2` as the next-hop IP address and appending `130` configures a floating static route. Because 130 is higher than Internal EIGRP's administrative distance of 90, the router keeps this static route inactive in the routing table until the primary EIGRP route is removed.

Adım Adım Çözüm

1
Identify the target network prefix and network mask.
The target prefix is 10.40.15.010.40.15.0 and the subnet mask for /24/24 is 255.255.255.0255.255.255.0.
Cisco IOS static route syntax requires the destination network prefix followed by its subnet mask.
2
Identify the next-hop IP address.
The next-hop IP address for the first blank is 192.168.254.2192.168.254.2.
Traffic destined for 10.40.15.0/2410.40.15.0/24 over the backup link will be forwarded to this next-hop IP.
3
Determine the administrative distance value to make the static route floating.
The administrative distance for the second blank is 130130.
An administrative distance value greater than the primary routing protocol's AD (Internal EIGRP AD = 90) ensures the static route remains floating (inactive in the routing table) until the primary route fails.

Anahtar Kavram

Floating Static Route Configuration & Administrative Distance
Soru 17Soru

An engineer is configuring a fully specified IPv6 static route on a Cisco router to forward traffic destined for 2001:db8:abc:33::/642001:\text{db8}:\text{abc}:33::/64. What local interface keyword completes the command syntax when using the next-hop link-local address fe80::cafe\text{fe80}::\text{cafe} via interface GigabitEthernet0/0/2?

Aşağıdaki boşlukları doldurun

Router(config)# ipv6 route 2001:db8:abc:33::/64 fe80::cafe
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Cevap

GigabitEthernet0/0/2 (or Gi0/0/2)
When configuring an IPv6 static route with a link-local next-hop address, Cisco IOS requires the local exit interface (GigabitEthernet0/0/2) to precede the link-local IPv6 address. Without the exit interface, the router cannot determine which local link reaches the specified link-local address.

Adım Adım Çözüm

1
Identify the mandatory components of a link-local IPv6 static route in Cisco IOS.
When a link-local address (FE80::/10) is specified as the next hop, Cisco IOS requires the local exit interface to be included preceding the next-hop address.
Link-local addresses are non-routable and exist independently on every link, making them ambiguous without specifying the outbound local interface.
2
Complete the command syntax.
The proper command structure is 'ipv6 route <destination-prefix/prefix-length> <exit-interface> <link-local-address>'. Inserting GigabitEthernet0/0/2 into {{blank_1}} correctly specifies the route.
This provides both interface scope and next-hop link-local identification.

Anahtar Kavram

Fully specified IPv6 static routes with link-local next hops
Soru 18Soru

In an enterprise WAN edge topology, router HQ-GW receives a path to subnet 10.80.0.0/1410.80.0.0/14 via a redistributed routing process resulting in an EIGRP External route (default Administrative Distance of 170170). An administrator needs to configure a floating static backup route for destination subnet 10.80.0.0/1410.80.0.0/14 using next-hop IP 192.168.200.1192.168.200.1 over an auxiliary link.

What minimum Administrative Distance integer value must be appended to the Cisco IOS command so that the static route remains dormant until the primary EIGRP External route fails?

Aşağıdaki boşlukları doldurun

ip route 10.80.0.0 255.240.0.0 192.168.200.1
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Cevap

171
Cisco IOS routes are populated into the routing table based on Administrative Distance (AD), where lower values indicate higher trustworthiness. EIGRP External routes possess a default AD of 170. For a static route to act as a floating backup (remaining inactive until the primary path fails), its AD must be set higher than the primary path's AD. The minimum integer value greater than 170 is 171.

Adım Adım Çözüm

1
Identify the Administrative Distance (AD) of the primary routing source.
EIGRP External routes have a standard Cisco IOS default AD of 170.
Routing decisions in Cisco IOS select the path with the lowest Administrative Distance.
2
Determine the required Administrative Distance condition for a floating static route.
The floating static route's AD must be strictly greater than 170.
If the static route's AD were less than or equal to 170, it would either override the primary path or cause equal-cost multi-pathing/route instability rather than serving strictly as a backup.
3
Calculate the minimum integer AD required for the static route command.
170 + 1 = 171.
171 is the lowest whole integer value greater than the primary path's AD of 170.

Anahtar Kavram

Floating Static Route Administrative Distance Selection
Soru 19Soru

An enterprise router learns the primary route to network 172.16.50.0/24172.16.50.0/24 via internal BGP (iBGP), which carries a default Administrative Distance of 200200. An administrator wants to configure a floating static backup route pointing to next-hop IP 10.1.1.210.1.1.2. Complete the Cisco IOS command below by entering the minimum administrative distance value required to ensure this route functions strictly as a backup path.

Aşağıdaki boşlukları doldurun

Router(config)# ip route 172.16.50.0 255.255.255.0 10.1.1.2
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Cevap

201
A floating static route must be configured with an Administrative Distance (AD) strictly greater than that of the primary route. Since iBGP has a default AD of 200, the static route requires an AD of at least 201 to remain inactive until the primary iBGP route fails.

Adım Adım Çözüm

1
Identify the Administrative Distance (AD) of the primary routing protocol.
The primary path is learned via iBGP, which has a default Administrative Distance of 200200.
Cisco IOS prefers routing information sources with lower Administrative Distance values.
2
Determine the required AD relationship for a floating static backup route.
The static route's administrative distance must be higher than the primary route's AD (>200> 200).
If the static route has an AD lower than or equal to 200200, Cisco IOS will install the static route into the routing table instead of holding it in reserve as a backup.
3
Calculate the minimum integer AD value for the command.
The smallest integer greater than 200200 is 201201.
Specifying 201201 at the end of the `ip route` command sets the static route's AD to 201, keeping it inactive until the iBGP route is removed.

Anahtar Kavram

Floating Static Routes and Administrative Distance
Tahmini Süre:1m 0s
Soru 20Soru

Complete the Cisco IOS command required to configure a floating static backup route.

Aşağıdaki boşlukları doldurun

An edge router receives its primary path to destination subnet 172.20.10.0/24172.20.10.0/24 via internal EIGRP, which carries a default Administrative Distance of 9090. A network engineer needs to configure a floating static backup route toward the same destination using next-hop IP 10.1.1.210.1.1.2 with an Administrative Distance of 100100.

What value should be entered to complete the Cisco IOS command below?

`ip route 172.20.10.0 255.255.255.0 10.1.1.2`
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Cevap

The missing parameter to complete the command is 100.
Appending the integer 100 to the end of the `ip route` syntax sets the static route's Administrative Distance to 100. Because 100 is higher than internal EIGRP's default AD of 90, the router will keep the static route inactive (floating) in the routing table until the primary EIGRP path becomes unavailable.

Adım Adım Çözüm

1
Analyze the Cisco IOS static route command structure.
The command syntax is `ip route <prefix> <mask> <next-hop> [distance]`.
The optional trailing integer at the end of the command specifies the Administrative Distance (AD) for the route.
2
Determine the required Administrative Distance value for the floating static route.
The problem specifies an Administrative Distance of 100 for the backup route.
Setting the AD to 100 ensures the static route remains higher (less preferred) than the primary internal EIGRP route (AD 90), causing it to float outside the routing table until the primary path fails.

Anahtar Kavram

Floating Static Route Configuration and Administrative Distance
Tahmini Süre:1m 0s
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