Learn how to fix the “Access interface can only be part of one VLAN” error when trying to commit configuration changes on Juniper switches. Discover the missing command needed for proper VLAN assignment.
Table of Contents
Question
{master:0} [edit interfaces ge-0/0/12]
user@switch# show
unit 0 {
family ethernet-switching (
vlan {
members [ v10 v20 ];
}
}
}
{master:0}[edit interfaces ge-0/0/12]
user@switch# commit
[edit interfaces ge-0/0/12 unit 0 family ethernet-switching]
'vlan'
Access interface can be part of only one vlan
error: configuration check-out failed
When trying to commit the configuration shown in the exhibit, you receive an error.
What is the problem?
A. You have not set the interface family correctly.
B. You have omitted the interface-mode access command.
C. You have omitted the interface-mode trunk command.
D. You have not configured an IP address to the interface.
Answer
B. You have omitted the interface-mode access command.
Explanation
When attempting to commit the Juniper switch configuration shown in the exhibit, the commit fails with the error message:
“Access interface can be part of only one vlan
error: configuration check-out failed”
The problem is that the “interface-mode” command has been omitted. Specifically, answer choice B is correct – you have omitted the “interface-mode access” command.
On Juniper switches, an interface in access mode can only belong to a single VLAN. The “interface-mode access” command must be configured under the interface’s family ethernet-switching hierarchy to designate it as an access port and allow it to be assigned to a VLAN.
To fix this error, add the following line under the [edit interfaces ge-0/0/12 unit 0 family ethernet-switching] hierarchy:
interface-mode access;
This will set ge-0/0/12 as an access mode interface. You can then specify the single VLAN it should belong to using the “members” command, for example:
vlan {
members v10;
}
After making this change, the configuration should commit successfully. Remember, an access mode interface can only be a member of one VLAN at a time.
Juniper JN0-351 certification exam assessment practice question and answer (Q&A) dump including multiple choice questions (MCQ) and objective type questions, with detail explanation and reference available free, helpful to pass the Juniper JN0-351 exam and earn Juniper JN0-351 certification.