| BOOTP/DHCP option 27, All Subnets are Local |
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Description | Glossary | RFCs | Publications | Obsolete RFCs |
| Protocol suite: | TCP/IP. |
| Protocol type: | Application layer configuration protocol. |
| Base protocols: |
BOOTP, Bootstrap Protocol. DHCP, Dynamic Host Configuration Protocol. |
| Option length: | 3 bytes. |
| Links: | IANA: BOOTP and DHCP options. |
This option specifies whether or not the client may assume that all subnets of the IP network to which the client is connected use the same MTU as the subnet of that network to which the client is directly connected.
| MAC header | IP header | UDP header | BOOTP | DHCP header | BOOTP/DHCP option 27 |
BOOTP/DHCP option 27:
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Code | Length | Value | |||||||||||||||||||||
Code.
8 bits.
Always set to 27.
Option code.
Length.
8 bits.
Always set to 1.
Size of the option data in bytes.
Value. 8 bits.
Value Description 0 Some subnets of the directly connected network may have smaller MTUs. 1 All subnets share the same MTU.
RFCs:
[RFC 2132] DHCP Options and BOOTP Vendor Extensions.
[RFC 1533] DHCP Options and BOOTP Vendor Extensions.
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Description | Glossary | RFCs | Publications | Obsolete RFCs |