openwrt中dhcp选项 各数字的含义

Known DHCP options:
1 netmask
2 time-offset
3 router
6 dns-server
7 log-server
9 lpr-server
13 boot-file-size
15 domain-name
16 swap-server
17 root-path
18 extension-path
19 ip-forward-enable
20 non-local-source-routing
21 policy-filter
22 max-datagram-reassembly
23 default-ttl
26 mtu
27 all-subnets-local
31 router-discovery
32 router-solicitation
33 static-route
34 trailer-encapsulation
35 arp-timeout
36 ethernet-encap
37 tcp-ttl
38 tcp-keepalive
40 nis-domain
41 nis-server
42 ntp-server
44 netbios-ns
45 netbios-dd
46 netbios-nodetype
47 netbios-scope
48 x-windows-fs
49 x-windows-dm
60 vendor-class
64 nis±domain
65 nis±server
66 tftp-server
67 bootfile-name
68 mobile-ip-home
69 smtp-server
70 pop3-server
71 nntp-server
74 irc-server
77 user-class
93 client-arch
94 client-interface-id
97 client-machine-id
119 domain-search
120 sip-server
121 classless-static-route
125 vendor-id-encap
255 server-ip-address