| Exam Code/Number: | JN0-643Join the discussion |
| Exam Name: | Enterprise Routing and Switching, Professional (JNCIP-ENT) |
| Certification: | Juniper |
| Question Number: | 290 |
| Publish Date: | Oct 16, 2026 |
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Rating
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-- Exhibit --
user@switch-1> show spanning-tree bridge
STP bridge parameters
Context ID : 0
Enabled protocol : MSTP
STP bridge parameters for CIST
...
STP bridge parameters for MSTI 1
MSTI regional root : 4097.b0:c6:9a:73:27:90
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Number of topology changes : 4
Time since last topology change : 42 seconds
Topology change initiator : ge-0/0/10.0
Topology change last recvd. from : 00:19:e2:55:24:8c
Local parameters
Bridge ID : 4097.b0:c6:9a:73:27:90
Extended system ID : 0
Internal instance ID : 1
STP bridge parameters for MSTI 2
MSTI regional root : 8194.b0:c6:9a:73:27:90
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Number of topology changes : 4
Time since last topology change : 42 seconds
Topology change initiator : ge-0/0/10.0
Topology change last recvd. from : 00:19:e2:55:24:8c
Local parameters
Bridge ID : 8194.b0:c6:9a:73:27:90
Extended system ID : 0
Internal instance ID : 2
user@switch-1> show spanning-tree mstp configuration
MSTP information
Context identifier : 0
Region name : my-mstp-config
Revision : 1
Configuration digest : 0x91ee8012e6851d931adae71da4060690
MSTI Member VLANs
0 0,400-4094
1 1-199
2 200-399
user@switch-2> show spanning-tree bridge
STP bridge parameters
Context ID : 0
Enabled protocol : MSTP
STP bridge parameters for CIST
...
STP bridge parameters for MSTI 1
MSTI regional root : 8193.b0:c6:9a:73:39:90
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Number of topology changes : 3
Time since last topology change : 320 seconds
Topology change initiator : ge-0/0/9.0
Topology change last recvd. from : b0:c6:9a:73:27:81
Local parameters
Bridge ID : 8193.b0:c6:9a:73:39:90
Extended system ID : 0
Internal instance ID : 1
STP bridge parameters for MSTI 2
MSTI regional root : 4098.b0:c6:9a:73:39:90
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Number of topology changes : 3
Time since last topology change : 320 seconds
Topology change initiator : ge-0/0/9.0
Topology change last recvd. from : 00:19:e2:55:24:8d
Local parameters
Bridge ID : 4098.b0:c6:9a:73:39:90
Extended system ID : 0
Internal instance ID : 2
user@switch-2> show spanning-tree mstp configuration
MSTP information
Context identifier : 0
Region name : my-mstp-config
Revision : 10
Configuration digest : 0x91ee8012e6851d931adae71da4060690
MSTI Member VLANs
0 0,400-4094
1 1-199
2 200-399
-- Exhibit --
Click the Exhibit button.
A colleague recently implemented MSTP in your Layer 2 network and is having trouble determining why it is not working properly. You are asked to review the outputs provided in the exhibit to determine the cause.
Referring to the exhibit, what is causing the issue?
-- Exhibit -
-- Exhibit --
Click the Exhibit button.
As shown in the exhibit, the 10.10/16 prefix is redistributed into OSPF through R2 and R5.
R2 is advertising the prefix with a Type 1 metric of 100 and R5 is advertising the prefix with a Type 2 metric of 10.
What is the preferred path to reach 10.10/16 from R6?
-- Exhibit -
-- Exhibit --
Click the Exhibit button.
Referring to the exhibit, routers A, B, and C are in the same BGP AS 100. Router A prefers to route traffic through Router C.
Which BGP attribute would you configure to ensure this behavior?
You are setting up a new switch in your network that is using MSTP. You want to make sure that any port connected to a host starts forwarding traffic immediately.
How can you meet this requirement?
-- Exhibit --
[edit protocols ospf]
user@R2# show
area 0.0.0.3 {
stub default-metric 10 no-summaries;
interface ge-0/1/1.0;
}
-- Exhibit --
Click the Exhibit button.
Referring to the output in the exhibit, which statement is true?
