Which statement is correct about this configuration snippet?
A.
Both voice and data traffic are tagged on ge-0/0/0.
B.
Voice traffic is tagged on ge-0/0/0, but data traffic is not.
C.
Data traffic is tagged on ge-0/0/0, but voice traffic is not.
D.
Neither voice nor data traffic is tagged on ge-0/0/0.
Explanation:
Both VLAN’s were tagged on the interface but done 2 different ways. The first adds
the interface ge-0.0.0 to the VOIP vlan from the ethernet-switching-options voip hierarchy, and the
second adds the data vlan from the interface configuration hierarchy
I think the answer should be B.
EX Series switches can accommodate an IP telephone and end host connected to a single switch port. In such a scenario, voice and data traffic must be separated into different broadcast domains, or VLANs. One method for accomplishing this is by configuring a voice VLAN, which enables access ports to accept untagged data traffic as well as tagged voice traffic from IP phones, and associate each type of traffic with separate and distinct VLANs. Voice traffic (tagged) can then be treated differently, generally with a higher priority than data traffic (untagged).
http://www.juniper.net/techpubs/en_US/junos13.3/topics/example/802-1x-pnac-voip-no-lldp-med-ex-series-configuring.html
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Correct Answer should be B.
Only voice traffic would be tagged using VOIP options.
Data traffic like PC would reach as untagged.
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They are both clearly tagged. data in v20, voip in v10. The only way that data was untagged is if the port said “access” and no vlan membership.
In that case, the data would be associated with the default vlan which is default UNTAGGED.
What you have to do then to be able to switch that traffic? You’d have to tell the trunk ports to allow it by adding “default native vlan” to the trunk.
Ketan2809 is right that the data CAN be untagged, but this question shows both are tagged. Ive set this up.
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I think the answer is “B”. and I think you miss understand about Data VLAN in Voice VLAN feature.
This is sample config, refer to JEX student guide.
user@switch-1# show interface ge-0/0/6
unit 0 {
family ethernet-switching {
port-mode access;
vlan {
members data;
}
}
}
from this sample config, interface ge-0/0/6 is config Voice VLAN feature. And this unit 0 is “Access Port” that must have vlan member “data” command (this is vlan’s name) and this VLAN is Untagged.
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Please update the question response as the correct answer is B. Port mode access does NOT tag the traffic.
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The answer should be B.
root@4200# run show ethernet-switching interfaces ge-0/0/6
Interface State VLAN members Tag Tagging Blocking
ge-0/0/6.0 up test 10 untagged unblocked
phone 20 tagged unblocked
root@4200# show ethernet-switching-options voip
interface ge-0/0/6.0 {
vlan 20;
}
root@4200# show ethernet-switching-options
voip {
interface ge-0/0/6.0 {
vlan 20;
}
}
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