Did you add firewall rules for the new interfaces? Because if you did not you end up with "deny all". Easiest way is to clone and adapt the LAN rule(s).
1. Could you please post the firewall rules for one of the interfaces?
2. Did you also enable and configure the DHCP server? This also does not happen automatically.
Could you post the output of "ifconfig" enclosed in code tags, please? "Code" is the hash mark (#) in the format bar.
root@RS39:~ # ifconfigigc0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500 description: MoDem_ETH1_icg0_black_Cat8 (wan) options=49420b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO,NETMAP,HWSTATS,MEXTPG> ether 60:be:b4:02:f9:18 inet 192.168.212.222 netmask 0xffffff00 broadcast 192.168.212.255 inet6 fe80::62be:b4ff:fe02:f938%igc0 prefixlen 64 scopeid 0x1 inet6 fdfe:9224:460a:0:62be:b4ff:fe02:f938 prefixlen 64 autoconf pltime 3600 vltime 7200 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>igc1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 description: Switch1_ETH2_igc1_green_Cat7 (lan) options=49420b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO,NETMAP,HWSTATS,MEXTPG> ether 60:be:b4:02:f9:19 inet 192.168.101.101 netmask 0xffffff00 broadcast 192.168.101.255 inet6 fe80::62be:b4ff:fe02:f939%igc1 prefixlen 64 scopeid 0x2 media: Ethernet autoselect status: no carrier nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>igc2: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500 description: Cisco6co_ETH3_igc2_blue_Cat7 (opt1) options=49420b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO,NETMAP,HWSTATS,MEXTPG> ether 60:be:b4:02:f9:1a inet 192.168.102.101 netmask 0xffffff00 broadcast 192.168.102.255 inet6 fe80::62be:b4ff:fe02:f93a%igc2 prefixlen 64 scopeid 0x3 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>igc3: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500 description: Switch2_ETH4_igc3_white_Cat7 (opt2) options=49420b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO,NETMAP,HWSTATS,MEXTPG> ether 60:be:b4:02:f9:1b inet 192.168.103.101 netmask 0xffffff00 broadcast 192.168.103.255 inet6 fe80::62be:b4ff:fe02:f93b%igc3 prefixlen 64 scopeid 0x4 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>lo0: flags=1008049<UP,LOOPBACK,RUNNING,MULTICAST,LOWER_UP> metric 0 mtu 16384 options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6> inet 127.0.0.1 netmask 0xff000000 inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5 groups: lo nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>enc0: flags=0 metric 0 mtu 1536 options=0 groups: enc nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>pflog0: flags=20100<PROMISC,PPROMISC> metric 0 mtu 33152 options=0 groups: pflogpfsync0: flags=0 metric 0 mtu 1500 options=0maxupd: 128 defer: off version: 1400 syncok: 1 groups: pfsync