200-150 · Question #184
Which statement is true about the crocc connections between 5k's and 7k's in the network?
The correct answer is C. VLANs 125-150 are allowed on the cross connections between the 7k's and 5k's. On cross-connections between Nexus 7000 and Nexus 5000 switches, the trunk is configured to allow only VLANs 125-150, restricting inter-switch VLAN propagation to that range.
Question
Which statement is true about the crocc connections between 5k's and 7k's in the network?
Options
- AVLAN 100 is the native VLAN
- B56 extended VALN are configured in the network
- CVLANs 125-150 are allowed on the cross connections between the 7k's and 5k's
- DVLANs 100-124 are err-disabled on the cross connections between the 7k's and 5k's
How the community answered
(42 responses)- A10% (4)
- B5% (2)
- C71% (30)
- D14% (6)
Why each option
On cross-connections between Nexus 7000 and Nexus 5000 switches, the trunk is configured to allow only VLANs 125-150, restricting inter-switch VLAN propagation to that range.
VLAN 100 being a native VLAN is not indicated by the topology; native VLAN assignment is a separate trunk configuration from the allowed VLAN list.
Extended VLANs span the range 1006-4094; the premise of exactly 56 extended VLANs being configured is not supported by the described topology.
Based on the referenced network topology, the trunk links interconnecting the 7k and 5k switches are explicitly configured with an 'allowed VLAN' list of 125-150, meaning only those VLANs are permitted to traverse those inter-switch links.
VLANs becoming err-disabled on a trunk indicates a spanning-tree or port-security violation, not a deliberate allowed-VLAN configuration, and this is not consistent with the topology.
Concept tested: NX-OS trunk allowed VLAN list between Nexus switches
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus7000/sw/layer2/config/cisco_nexus7000_layer2_config_guide_8x/config_vlans.html
Topics
Community Discussion
No community discussion yet for this question.