No, there will not be packet loss. Check out the following test:
{master:0}[edit]
lab@EX4200# show interfaces ge-0/0/0 | display inheritance
##
## '1600' was expanded from interface-range 'ALL'
##
mtu 1600;
unit 0 {
family inet {
address 192.168.0.100/24;
}
}
{master:0}[edit]
lab@EX4200#
{master:0}[edit]
lab@EX4200# show interfaces interface-range ALL | display set
set interfaces interface-range ALL member-range ge-0/0/0 to ge-0/0/10
set interfaces interface-range ALL mtu 1600
{master:0}[edit]
lab@EX4200# delete interfaces interface-range ALL
{master:0}[edit]
lab@EX4200# set interfaces interface-range ALL member-range ge-0/0/1 to ge-0/0/10
{master:0}[edit]
lab@EX4200# set interfaces interface-range ALL mtu 1600
{master:0}[edit]
lab@EX4200# show interfaces interface-range ALL | display set
set interfaces interface-range ALL member-range ge-0/0/1 to ge-0/0/10
set interfaces interface-range ALL mtu 1600
{master:0}[edit]
lab@EX4200# commit
configuration check succeeds
commit complete
{master:0}[edit]
lab@EX4200# show interfaces ge-0/0/0 | display inheritance
unit 0 {
family inet {
address 192.168.0.100/24;
}
}
{master:0}[edit]
lab@EX4200#
During all this time, I was doing a rapid ping sourced from 192.168.0.100 with no packet loss.
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