HP
HP0-Y36 · Question #55
Given the following MSTP region configurations for Switch 1, Switch 2, Switch 3, and Switch 4: Switch 1 stp region-configuration region-name Acme revision-level 2 instance 1 vlan 1 to 100 instance 2…
The correct answer is A. MSTP updates the region configuration of switches with older revisions and the additional VLANs are not created. See the full explanation below for the reasoning.
Question
Given the following MSTP region configurations for Switch 1, Switch 2, Switch 3, and Switch 4:
Switch 1
stp region-configuration
region-name Acme
revision-level 2
instance 1 vlan 1 to 100
instance 2 vlan 101 to 200
active region-configuration
Switch 2
stp region-configuration
region-name Acme
revision-level 2
instance 1 vlan 1 to 100
instance 2 vlan 101 to 200
active region-configuration
Switch 3
stp region-configuration
region-name Acme
revision-level 2
instance 1 vlan 1 to 100
instance 2 vlan 101 to 200
active region-configuration
Switch 4
stp region-configuration
region-name Acme
revision-level 3
instance 1 vlan 1 to 100
instance 2 vlan 101 to 200
instance 3 vlan 201 to 300
active region-configuration
What happens when Switch 4 completes its boot cycle and joins the MSTP domain?
Options
- AMSTP updates the region configuration of switches with older revisions and the additional VLANs are not created.
- BMSTP updates the region configuration of the switches with lower revision numbers and creates additional VLANs.
- CMSTP detects an inconsistency between region configurations by analyzing the digest in the BPDU, then uses Common Spanning tree between Switch 1 and Switch 3, and Switch 2 and Switch 4.
- DMSTP detects an inconsistency between region configurations by analyzing the digest in the BPDU, then uses Common Spanning tree between Switch 1 and Switch 4, and Switch 2 and Switch 3.
- EMSTP detects an inconsistency between region configurations by analyzing the digest in the BPDU, then uses Common Spanning tree between Switch 1 and Switch 2, and Switch 3 and Switch 4.
- FMSTP does not modify the region configuration, and only traffic for instances 1 and 2 are carried over trunk links.
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