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IPv6 edge router has link-local next hop fe80::c73 on GigabitEthernet0/2, while destination 2001:db8:feed::/48 has no more-specific static route. Which syntax sets a valid IPv6 default using a link-local next hop?
When the next hop is link-local fe80::c73, the outgoing interface GigabitEthernet0/2 is required to identify the correct local link. ::/0 is the IPv6 default prefix.
IPv4 ip route cannot install an IPv6 default using fe80:: link-local syntax.
A link-local next hop alone is ambiguous across interfaces; IOS normally requires an outgoing interface for such a static route.
2001:db8:feed::/48 covers one network rather than all unmatched IPv6 destinations.
At a school district, a network administrator needs an exact IPv6 host route for 2001:db8:f1f::5f via an adjacent router on GigabitEthernet0/1. Which command is suitably specific?
A /128 IPv6 route selects exactly host 2001:db8:f1f::5f rather than the broader LAN prefix. The specified egress interface and adjacent next hop determine transport.
The IPv4 route syntax and netmask cannot configure this IPv6 host address.
A /64 prefix covers a full IPv6 LAN rather than only this target host, so it broadens forwarding unnecessarily.
An IPv6 default route would capture unmatched traffic globally, not only 2001:db8:f1f::5f.
At a manufacturing plant, a network administrator is setting a Cisco routed edge to forward unmatched IPv4 traffic to ISP next hop 10.65.83.1. Which global configuration creates the required default route?
This defines an IPv4 default static route /0 to next hop 10.65.83.1. It is used when more-specific installed routes do not match the destination.
255.255.255.255 is not the destination network ID for a /0 default route. The mask and destination are not paired correctly.
This adds a host-specific mask /32 for 0.0.0.0 rather than a true catch-all /0 route.
The mask 255.255.255.248 does not define /0; it matches only a restricted prefix beginning at 0.0.0.0. A genuine default has a zero mask, matching every otherwise-unrouted IPv4 destination.
An engineer configured `ip route 172.16.166.0 255.255.255.192 10.11.190.1`, but traffic still uses the default route. Which verification step best establishes whether the static /26 has entered the router's IPv4 routing table?
The route-specific IOS routing-table lookup shows installed candidate and next-hop resolution. A configured static route may not install if its next hop cannot be resolved.
Physical switch interface status alone cannot establish which Layer 3 route the router installed.
A VLAN can exist without any matching router route; Layer 2 segmentation and IPv4 route installation are different state.
Name resolution does not determine whether a configured network prefix is installed in the IPv4 RIB.
A router has a point-to-point serial interface Serial0/0/0 directly connected to a remote router. The operator needs a static route to 192.0.2.128/25 without entering a neighbor IP. Which IOS statement is suitable for this point-to-point exit?
On a point-to-point link the outgoing interface unambiguously identifies the next hop. The prefix and mask cover only the intended /25 destination.
A /24 mask would include addresses outside the requested 192.0.2.128/25.
This is IPv4 syntax and requires ip route, not the IPv6 route command.
Null0 discards matching packets instead of forwarding them over the actual serial connection.
At a regional office, a network administrator uses OSPF (AD 110) as the primary path to 172.27.115.0/24. A static backup via 10.15.109.1 must activate only after OSPF disappears. Which command achieves that?
A floating static route uses higher administrative distance 150 so it stays out of the RIB while the preferred OSPF route (AD 110) is available. It can take over on failure.
AD 1 makes this static route preferred over OSPF; it would not float behind the learned route.
AD 0 behaves as an even more preferred route and does not supply a floating backup.
AD 5 is still lower than OSPF 110, so the static route would normally supersede the primary.
At a clinic, the site engineer needs a static IPv6 route to 2001:db8:848::/48 via IPv6 next hop 2001:db8:848:ffff::1. Which IOS syntax represents this network route?
ipv6 route specifies a static IPv6 destination 2001:db8:848::/48 and IPv6 next hop 2001:db8:848:ffff::1. IPv6 routing must also be enabled appropriately.
0.0.0.0 is an IPv4 address and cannot serve directly as an IPv6 next-hop literal.
The IPv4 ip route parser is not used for an IPv6 prefix and IPv6 next-hop address.
::/0 defines the IPv6 default route and is broader than this single /48 destination.
An edge router learns an IPv6 default route from a dynamic protocol and needs an IPv6 static backup via 2001:db8:1::2 with administrative distance 220. Which route statement creates the fallback?
The /0 destination matches any IPv6 address when no more-specific route exists. Setting AD 220 makes this static default less preferred than the active dynamic default until failover.
An AD of 1 normally makes the static default preferred over common dynamic defaults, not a floating backup.
The ip route command configures IPv4 routing, not an IPv6 default prefix.
That statement targets a host prefix rather than an IPv6 catch-all default and does not supply the intended next hop.
R1's configuration includes `ipv6 route 2001:db8:50::/64 FE80::2`. The neighbor address is link-local, and R1 has two Ethernet links that could use that address. What information is missing?
Link-local IPv6 addresses are only unique on their own links, so the outgoing interface must disambiguate which neighbor to resolve.
IPv6 static routes use prefix length notation, not a separate IPv4 dotted-decimal mask.
Static routing does not depend on enabling a dynamic routing protocol.
A link-local IPv6 neighbor is directly scoped to an interface; IPv4 NAT is unrelated to this route's IPv6 next-hop resolution.
A router has a static default route in its configuration but `show ip route` still reports `Gateway of last resort is not set`. The configured next-hop is an address on a failed upstream link. What is the best conclusion?
The routing table is the operational source for forwarding. Loss of the next-hop resolution path can withdraw a static route even while its configuration remains.
A configuration entry does not guarantee an eligible installed route; down interfaces and unresolved next hops matter.
Static default routes do not require a dynamic routing process.
Adding unrelated defaults does not repair the failed adjacency and can misroute other traffic.
At a nonprofit organization, a network operations engineer requires a static route to IPv4 network 172.25.157.0/25 through adjacent router 10.24.42.1. Which IOS command configures the intended route?
The static network route uses destination 172.25.157.0 with mask 255.255.255.128 (/25) and next hop 10.24.42.1. The route matches the intended subnet.
A /32 mask would make the route host-specific and omit most of the intended /25 range.
A zero mask is a default-length /0 entry, not the specific 25-bit destination route.
This reverses the destination and next-hop positions; 10.24.42.1 is a gateway, not the announced subnet.
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