Hi,
AFAIK, we cannot use vlan-ids or tags on EXs. This is possible under family bridge [MX/SRX] with vlan-id-list. Example:
interfaces ae2 { unit 0 { family bridge { interface-mode trunk; vlan-id-list 100, 200–205; } } }
To change vlan-name in whole config, you could use "replace pattern xxxx with yyyy"
With method 1, the vlan-name would be present in only one line of the configuration hierarchy.
Hope this helps.
Cheers,
Ashvin