| MZAP, Multicast-Scope Zone Announcement Protocol |
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Description | Glossary | RFCs | Publications | Obsolete RFCs |
| Protocol suite: | TCP/IP. |
| Protocol type: | Application layer protocol. |
| Multicast addresses: | |
| Ports: | 2106 (UDP) server. |
| URI: | |
| MIME subtype: | |
| SNMP MIBs: | |
| Working groups: | mboned, MBONE Deployment. |
| Links: |
| MAC header | IP header | UDP header | MZAP header | Data ::: |
MZAP header:
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Version | B | Type | Address family | Namecount | |||||||||||||||||||||||||||
| Message Origin ::: | |||||||||||||||||||||||||||||||
| Zone ID address ::: | |||||||||||||||||||||||||||||||
| Zone start address ::: | |||||||||||||||||||||||||||||||
| Zone end address ::: | |||||||||||||||||||||||||||||||
| Encoded zone name[] ::: | |||||||||||||||||||||||||||||||
| padding | |||||||||||||||||||||||||||||||
Version.
8 bits.
MZAP version number.
Should be cleared to 0.
B, Big scope. 1 bit.
| B | Description |
|---|---|
| 0 | The addresses in the scoped range are not subdividable, and that address allocators may utilize the entire range. |
| 1 | Address allocators should not use the entire range, but should learn an appropriate sub-range via another mechanism. |
Type.
7 bits.
Packet type.
| Ptype | Description | References |
|---|---|---|
| 0 | ZAM, Zone Announcement Message. | RFC 2776 |
| 1 | ZLE, Zone Limit Exceeded. | RFC 2776 |
| 2 | ZCM, Zone Convexity Message. | RFC 2776 |
| 3 | NIM, Not-Inside Message. | RFC 2776 |
Address family.
8 bits.
The IANA-assigned address family number identifying the address family for all addresses in the packet.
| Value | Description |
|---|---|
| 1 | IPv4. |
| 2 | IPv6. |
Namecount.
8 bits.
The number of encoded zone name blocks in this packet. May be set to zero.
Message Origin.
32 bits (IPv4) or 128 bits (IPv6).
IP address of the interface that originated the message.
Zone ID address.
32 bits (IPv4) or 128 bits (IPv6).
This gives the lowest IP address of a boundary router that has been observed in the zone originating the message.
Together with Zone start address and Zone end address, it forms a unique ID for the zone.
Note that this ID is usually different from the ID of the Local Scope zone in which the origin resides.
Zone start address.
32 bits (IPv4) or 128 bits (IPv6).
The start IP address for the scope zone boundary.
Zone end address.
32 bits (IPv4) or 128 bits (IPv6).
The ending IP address for the scope zone boundary.
Encoded zone name[].
Variable length.
A list of Encoded zone name elements.
padding.
Variable length, 0 to 3 bytes.
Used to pad the packet to a multiple of 32 bits.
Encoded zone name: Variable length.
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
|---|---|---|---|---|---|---|---|
| D | reserved | ||||||
| Tag length | |||||||
| Language tag ::: | |||||||
| Name length | |||||||
| Zone name ::: | |||||||
D, default Language.
1 bit.
If set, indicates a preference that the name in the following language should be
used if no name is available in a desired language.
reserved.
7 bits.
Should be cleared to zero on transmission and ignored on reception.
Tag length.
8 bits.
Size of the Language tag in bytes.
Language tag.
Variable length, 0 to 255 bytes.
The language of the zone name.
Name length.
8 bits.
Size of the Zone name in bytes.
Zone name.
Variable length, 0 to 255 bytes.
An ISO 10646 character string in UTF-8 encoding indicating the name given to the scope zone (eg: "ISI-West Site").
It should be relatively short, and
white space SHOULD be stripped from the beginning and end of each name before encoding, to avoid accidental conflicts.
RFCs:
[RFC 2776] Multicast-Scope Zone Announcement Protocol (MZAP).
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Description | Glossary | RFCs | Publications | Obsolete RFCs |