以下のいずれかを指定可能です。
- 数値 : 0-65535
- Ethernet protocol number
- all
- Any protocol
- 802.1Q
- 802.1Q VLAN tag
- 802_2
- 802_3
- aarp
- aoe
- arp
- Address Resolution Protocol
- atalk
- Appletalk
- dec
- ip
- Internet IP (IPv4)
- ipv6
- Internet IP (IPv6)
- ipx
- Novell Internet Packet Exchange
- lat
- localtalk
- rarp
- snap
- x25