Figure 41-1. Option Codes and Lengths
Option Code
21 (Policy Filter)
22 (Max Datagram
Reassembly)
23 (IP TTL)
24 (Path MTU Aging)
25 (Path MTU Plateau)
26 (Interface MTU)
27 (Subnets are local)
28 (Broadcast Address)
29 (Perform Mask)
30 (Mask Supplier)
31 (Perform Router
Discovery)
32 (Router Solicitation
Address)
33 (Static Router Option) –
34 (Trailer
Encapsulation)
35 (ARP Cache Timeout) 4
36 (Ethernet
Encapsulation)
37 (TCP TTL)
38 (TCP Keepalive
Interval)
39 (TCP Keepalive
Garbage)
40 (Network Information
Service)
41 (Network Information
Servers)
834
DHCP Server and Relay Agent Commands
(continued)
Fixed Length
Minimum Length Multiple Of
–
8
2
–
1
–
4
–
–
2
2
–
1
–
4
–
1
–
1
–
1
–
4
–
8
1
–
–
1
–
1
–
4
–
1
–
–
1
–
4
8
–
–
–
2
–
–
–
–
–
–
–
8
–
–
–
–
–
–
–
4