JN0-351 Exam Dumps : Enterprise Routing and Switching Specialist (JNCIS-ENT)

The output shown in the exhibit is a brief display of the Ethernet switching table, which shows the learned Layer 2 MAC addresses for each VLAN and interface 1 .

The command  show ethernet-switching table  displays the Ethernet switching table with brief information, such as the destination MAC address, the VLAN name, the forwarding state, and the interface name 1 .

The command  show route forwarding-table  displays the routing table information for each protocol family, such as inet, inet6, mpls, iso, and so on 2 . It does not show the Ethernet switching table or the MAC addresses.

The command  show ethernet-switching table extensive  displays the Ethernet switching table with extensive information, such as the destination MAC address, the VLAN name, the forwarding state, the interface name, the VLAN index, and the tag type 1 . It shows more details than the brief output shown in the exhibit.

The command  show route forwarding-table family ethernet-switching  displays the routing table information for the ethernet-switching protocol family, which shows the destination MAC address, the next-hop MAC address, and the interface name 3 . It does not show the VLAN name or the forwarding state.

The static route to the 0.0.0.0/0 network has a next hop of xe-0/0/0.0, which is a local interface. BGP does not accept static routes with a local interface as the next hop, because it cannot advertise them to other BGP peers. BGP requires a valid IP address as the next hop for static routes that are redistributed into BGP. To fix this issue, the static route should have a next hop of an IP address that is reachable via the xe-0/0/0.0 interface, such as the IP address of the eBGP neighbor. Alternatively, the next hop can be modified by using a route map when redistributing the static route into BGP12.

The other options are not correct because:

The as-path parameter is not required for redistributing static routes into BGP. The as-path attribute is automatically set by BGP when advertising routes to other BGP peers3.

A community string is not required for redistributing static routes into BGP. A community is an optional attribute that can be used to group routes and apply policies to them4.

The no-readvertise feature is not specified in the configuration. The no-readvertise feature is used to prevent routes learned from one iBGP peer from being advertised to another iBGP peer5.

Option A is correct. Creating multiple areas in OSPF can help to reduce the convergence time . This is because changes in one area do not affect other areas, so fewer routers need to run the SPF algorithm in response to a change.

Option D is correct. Creating multiple areas in OSPF can help to reduce Link State Advertisement (LSA) flooding across the network. This is because LSAs are not flooded out of their area of origin.