500-230 Online Practice Questions and Answers

Which command is used to undo a change after issuing a commit command?

A. router# rollback configuration to -1

B. router(config# commit undo

C. router(config)# commit rollback

D. router# rollback configuration last 1

What command is used to manually generate a core dump to aid in troubleshooting a process?

A. context

B. dumpcore

C. exception

D. follow

Which statements are true regarding L3VPN configurations?

A. Prior to configuring a vrf within MP-BGP, the router has to have instantiated the VPNv4 or VPNv6 address-family.

B. On a single PE router, the Route Distinguisher and the Route Targets must be the same.

C. Prior to configuring a neighbor in the VPNv4 address-family, it must already be configured for IPv4Unicast.

D. The import and export Route Targets must be the same on a PE.

What is currently required for eBGP sessions in IOS-XR that was not required in IOS?

A. Default MED values

B. Local-Preference values

C. Send Communities

D. Route-Filter In and Out

When are core dump files created by the system?

A. There are too many critical events.

B. There are too many duplicate messages.

C. The commit database is full.

D. A process fails or terminates abnormally.

Which protocol is a PE to CE routing protocol?

A. ODR

B. LDP

C. RIPv1

D. eBGP

Which method or protocol exchanges label information?

A. MP-BGP

B. MOSPF

C. LSR

D. OSPFv3

How do you verify the label(s) used between the ASBRs in Option A Inter-AS L3VPN operation?

A. There are no labels used between the ASBRs

B. Verify the labels assigned by MP-BGP in the SHOW BGP VPNV4 UNICAST

C. Verify the labels assigned by MP-BGP in the SHOW CEF VRF output

D. Verify the labels assigned by LDP in the output of SHOW MPLS FORWARDING

Which command is an example of how to configure system logging to a Syslog server?

A. logging 172.21.116.27

B. syslog server1

C. logging syslog-server 172.21.116.27

D. enable syslog server1

How frequently does the WDSYSMON Watcher thread wake up to check counters?

A. every 500 msec

B. every 2 sec

C. every 200 msec

D. every 1 sec