Good afternoon.
I have a problem.
It does not work correctly the second switch 6-10
IP addresses are not issued
The first switch 1-5 works correctly.
My configuration.
# jun/20/2017 09:15:12 by RouterOS 6.39.2
# software id = GGT8-1MQW
#
/interface bridge
add name=bridge1
/interface ethernet
set [ find default-name=ether7 ] master-port=ether6
set [ find default-name=ether8 ] master-port=ether6
set [ find default-name=ether9 ] master-port=ether6
set [ find default-name=ether10 ] master-port=ether6
set [ find default-name=ether3 ] master-port=ether5
set [ find default-name=ether4 ] master-port=ether5
/ip pool
add name=dhcp ranges=192.168.88.89-192.168.88.245
/ip dhcp-server
add add-arp=yes address-pool=dhcp disabled=no interface=bridge1 name=server1
/interface bridge port
add bridge=bridge1 interface=ether5
add bridge=bridge1 interface=ether6
/ip address
add address=192.168.88.88/24 interface=bridge1 network=192.168.88.0
/ip dhcp-client
add dhcp-options=hostname,clientid disabled=no interface=ether1
add dhcp-options=hostname,clientid disabled=no interface=ether2
/ip dhcp-server network
add address=192.168.88.0/24 gateway=192.168.88.88
/ip firewall nat
add action=masquerade chain=srcnat out-interface=ether1
/ip service
set telnet disabled=yes
set ftp disabled=yes
set www disabled=yes
set ssh disabled=yes
set api disabled=yes
set api-ssl disabled=yes
/system clock
set time-zone-name=Europe/Moscow
Sorry my bad english.