Hello,
Given the setup:
Upon configuring VLAN "145" on a the trunks between the switches (a<->b, a<->c, a<->d and b<->a, b<->c, b<->d , FW <-> a/b, VC <-> c/d)
The ae3 and ae4 interface will go down on the b switch and the server connected to the VC (Virtual Chassis) will not be reachable.
ICCP for both sessions is configured between a<->b using ae0 interface.
If there are no vlans configured on the interfaces all the MC-LAG involved interfaces will stay up.
Configuration on a:
set interfaces ae3 mtu 9192
set interfaces ae3 aggregated-ether-options lacp active
set interfaces ae3 aggregated-ether-options lacp periodic fast
set interfaces ae3 aggregated-ether-options lacp system-id 00:01:02:03:03:03
set interfaces ae3 aggregated-ether-options lacp admin-key 3003
set interfaces ae3 aggregated-ether-options mc-ae mc-ae-id 3003
set interfaces ae3 aggregated-ether-options mc-ae chassis-id 1
set interfaces ae3 aggregated-ether-options mc-ae mode active-active
set interfaces ae3 aggregated-ether-options mc-ae status-control standby
set interfaces ae3 aggregated-ether-options mc-ae init-delay-time 240
set interfaces ae3 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae3 unit 0 family ethernet-switching vlan members 145
set interfaces ae4 mtu 9192
set interfaces ae4 aggregated-ether-options lacp active
set interfaces ae4 aggregated-ether-options lacp periodic fast
set interfaces ae4 aggregated-ether-options lacp system-id 00:01:02:03:03:04
set interfaces ae4 aggregated-ether-options lacp admin-key 3004
set interfaces ae4 aggregated-ether-options mc-ae mc-ae-id 3004
set interfaces ae4 aggregated-ether-options mc-ae chassis-id 1
set interfaces ae4 aggregated-ether-options mc-ae mode active-active
set interfaces ae4 aggregated-ether-options mc-ae status-control standby
set interfaces ae4 aggregated-ether-options mc-ae init-delay-time 240
set interfaces ae4 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae4 unit 0 family ethernet-switching vlan members 145
b:
set interfaces ae3 mtu 9192
set interfaces ae3 aggregated-ether-options lacp active
set interfaces ae3 aggregated-ether-options lacp periodic fast
set interfaces ae3 aggregated-ether-options lacp system-id 00:01:02:03:03:03
set interfaces ae3 aggregated-ether-options lacp admin-key 3003
set interfaces ae3 aggregated-ether-options mc-ae mc-ae-id 3003
set interfaces ae3 aggregated-ether-options mc-ae chassis-id 0
set interfaces ae3 aggregated-ether-options mc-ae mode active-active
set interfaces ae3 aggregated-ether-options mc-ae status-control active
set interfaces ae3 aggregated-ether-options mc-ae init-delay-time 240
set interfaces ae3 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae3 unit 0 family ethernet-switching vlan members 145
set interfaces ae4 mtu 9192
set interfaces ae4 aggregated-ether-options lacp active
set interfaces ae4 aggregated-ether-options lacp periodic fast
set interfaces ae4 aggregated-ether-options lacp system-id 00:01:02:03:03:04
set interfaces ae4 aggregated-ether-options lacp admin-key 3004
set interfaces ae4 aggregated-ether-options mc-ae mc-ae-id 3004
set interfaces ae4 aggregated-ether-options mc-ae chassis-id 0
set interfaces ae4 aggregated-ether-options mc-ae mode active-active
set interfaces ae4 aggregated-ether-options mc-ae status-control active
set interfaces ae4 aggregated-ether-options mc-ae init-delay-time 240
set interfaces ae4 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae4 unit 0 family ethernet-switching vlan members 145
c:
set interfaces ae3 mtu 9192
set interfaces ae3 aggregated-ether-options lacp active
set interfaces ae3 aggregated-ether-options lacp periodic fast
set interfaces ae3 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae3 unit 0 family ethernet-switching vlan members 145
d:
set interfaces ae4 mtu 9192
set interfaces ae4 aggregated-ether-options lacp active
set interfaces ae4 aggregated-ether-options lacp periodic fast
set interfaces ae4 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae4 unit 0 family ethernet-switching vlan members 145
VC:
set interfaces ae0 aggregated-ether-options lacp active
set interfaces ae0 aggregated-ether-options lacp periodic fast
set interfaces ae0 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae0 unit 0 family ethernet-switching vlan members 145
set interfaces ae1 mtu 9192
set interfaces ae1 aggregated-ether-options lacp active
set interfaces ae1 aggregated-ether-options lacp periodic fast
set interfaces ae1 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae1 unit 0 family ethernet-switching vlan members 145
Interfaces towards FW have configured vlan all on both interfaces from a and b
Tried configuring RSTP, VSTP with no luck.
To make this setup working traffic is routed on the upper side: FW <-> a <-> c <-> VC
Given the desired setup the configuration should work without problems.
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ALEXANDRU MINZAT
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