-- Exhibit --
{master}[edit]
user@router-RE0# run show task replication
Stateful Replication: Enabled -
RE modE. Master -
Protocol Synchronization Status
OSPF Complete
RIP Complete
BGP Complete
MPLS Complete
LDP Complete
{master}[edit]
user@router-RE0# run show bgp summary | match 192.168.1.1
192.168.1.1 65056 288 327 0 2 1:05 Establ
{backup}[edit]
user@router-RE1# run show system switchover
Graceful switchover: On -
Configuration databasE. Ready -
Kernel databasE. Ready -
Peer statE. Steady State -
{backup}[edit]
user@router-RE1# run show bgp summary | find 192.168.1.1
192.168.1.1 65056 592 737 3778 2 1:33 Establ
{backup}[edit]
user@router-RE1# run show bgp replication
Synchronization master:
Session statE. Up, SincE. 6d 20:42:51
Flaps: 1, Last flap reason: Commit-sync error
Protocol statE. Idle, SincE. 5d 19:41:52
Synchronization statE. Complete -
Number of peers waitinG. AckWait: 0, SoWait: 0, ScheduleD. 0
rsync walk at: inet.0 - , queued 0
Messages sent: Open 1, Establish 7415, Update 17, Error , Complete 48
Messages receiveD. Open 1, Request 1 wildcard 47 targeted, EstablishAck 2827, CompleteAck 4
-- Exhibit --
Click the Exhibit button.
Referring to the exhibit, which statement is correct?
Click on the arrows to vote for the correct answer
A. B. C. D.D
Referring to the exhibit, the output of the commands shows that the router is using stateful replication and has two Routing Engines (RE0 and RE1) operating in master and backup modes respectively.
The first command "run show task replication" shows that stateful replication is enabled and all the protocols (OSPF, RIP, BGP, MPLS, LDP) have been synchronized between the two REs, which means that both REs have identical routing information.
The second command "run show bgp summary | match 192.168.1.1" shows the BGP status of the router with the IP address 192.168.1.1. On the master RE0, the BGP state is Established with two peers and the session has been up for 5 minutes (1:05).
The third command "run show system switchover" shows that the backup RE1 is GRES (Graceful Routing Engine Switchover) ready, which means that it can take over as the master RE in the event of a failure on the current master RE0. The configuration and kernel databases are ready, and the peer state is steady, indicating that the backup RE is ready to take over as the master without causing any disruptions.
The fourth command "run show bgp summary | find 192.168.1.1" shows the BGP status of the router with the IP address 192.168.1.1 on the backup RE1. The BGP state is Established with two peers, and the session has been up for 1 minute and 33 seconds (1:33). The BGP status on the backup RE1 is the same as the master RE0, indicating that the stateful replication is working correctly.
The last command "run show bgp replication" shows the BGP replication status between the two REs. The synchronization master is the master RE0, and the replication state is complete. The number of peers waiting for acknowledgement is 0, indicating that there are no pending updates. The last flap reason is a commit-sync error, indicating that there was an error synchronizing the configuration database between the two REs.
Based on the exhibit, the correct statement is D. The system is NSR (Nonstop Routing) ready, and a switchover should be hitless to the BGP control and data plane. This means that the backup RE1 can take over as the master RE0 without causing any disruptions to the BGP protocol or the data plane. However, the configuration database needs to be synchronized between the two REs to avoid any errors during the switchover.