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Multiple VLAN Rename in one commit breaks VLAN traffic flow between 2 switches

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Hello guys,

 

In a EX4300 stack SW-Cisco stack SW aggregated connection, I tried renaming an existing VLAN and using the previous VLAN to rename another existing VLAN in one commit as shown below:

xxx@sw1# rename vlans FREE-560 to FREE-xxx

{master:0}[edit]
xxx@sw1# rename vlans FREE-559 to FREE-560

xxx@sw1# show | compare
[edit vlans]
- FREE-559 {
- description "### FREE ###";
- vlan-id 559;
- }
[edit vlans FREE-560]
- description "### FREE ###";
- vlan-id 560;
- l3-interface irb.560;
+ description "### FREE ###";
+ vlan-id 559;
[edit vlans]
+ FREE-xxx {
+ description "### FREE ###";
+ vlan-id 560;
+ l3-interface irb.560;
+ }

xxx@sw1# commit
fpc0:
configuration check succeeds
fpc1:
commit complete
fpc2:
commit complete
fpc0:
commit complete

{master:0}[edit]

 

After commiting, traffic stops between on VLAN FREE-560 between both switches. But when I rename in two commits as shown below, it worked fine:

xxx@sw1# rename vlans FREE-560 to FREE-xxx

{master:0}[edit]
xxx@sw1# commit
fpc0:
configuration check succeeds
fpc1:
commit complete
fpc2:
commit complete
fpc0:
commit complete

xxx@sw1# rename vlans FREE-559 to FREE-560

{master:0}[edit]
xxx@sw1# commit
fpc0:
configuration check succeeds
fpc1:
commit complete
fpc2:
commit complete
fpc0:
commit complete

 

Any idea what's happening?


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