Post your existing configuration to get the modification necessary to make VLAN100 on the bond untagged on the wire. See the recommendation how to do it in my automatic signature.
Hello Sindy! Here are my configuration
interface bonding print
Flags: X - disabled, R - running
0 R name="Bonding1-LAN1&2" mtu=1500 mac-address=6C:3B:6B:60:60:36 arp=enabled
arp-timeout=auto slaves=ether1-LAN1,ether2-LAN2 mode=802.3ad primary=none
link-monitoring=mii arp-interval=100ms arp-ip-targets=""
mii-interval=100ms down-delay=0ms up-delay=0ms lacp-rate=30secs
transmit-hash-policy=layer-2-and-3 min-links=0
interface bridge print
Flags: X - disabled, R - running
0 R name="Bridge_Trunk" mtu=auto actual-mtu=1500 l2mtu=1580 arp=enabled
arp-timeout=auto mac-address=6C:3B:6B:60:60:34 protocol-mode=rstp
fast-forward=no igmp-snooping=no auto-mac=yes ageing-time=5m
priority=0x8000 max-message-age=20s forward-delay=15s
transmit-hold-count=6 vlan-filtering=no
interface vlan print
Flags: X - disabled, R - running
# NAME MTU ARP VLAN-ID INTERFACE
0 R VLAN10_LAN1 1500 enabled 10 Bridge_Trunk
1 R VLAN20_WiFi 1500 enabled 20 Bridge_Trunk
2 R VLAN30_Guest 1500 enabled 30 Bridge_Trunk
3 R VLAN100_MGMT 1500 enabled 100 Bridge_Trunk
ip dhcp-server print
Flags: D - dynamic, X - disabled, I - invalid
# NAME INTERFACE RELAY ADDRESS-POOL LEASE-TIME ADD-ARP
0 dhcp1 VLAN10_LAN1 dhcp_pool1 10m
1 dhcp2 VLAN20_WiFi dhcp_pool2 10m
2 dhcp3 VLAN30_Guest dhcp_pool3 10m
3 dhcp4 VLAN100_MGMT dhcp_pool4 10m