RFC 3025 (rfc3025) - Page 2 of 8
Mobile IP Vendor/Organization-Specific Extensions
Alternative Format: Original Text Document
RFC 3025 Mobile IP Vendor Specific Extensions February 2001
silently discard
The implementation discards the datagram without further
processing, and without indicating an error to the sender.
The implementation SHOULD provide the capability of logging
the error, including the contents of the discarded datagram,
and SHOULD record the event in a statistics counter.
2. Vendor/Organization Specific Extensions
Two Vendor/Organization Specific Extensions are described, Critical
(CVSE) and Normal (NVSE) Vendor/Organization Specific Extensions.
The basic differences between the Critical and Normal Extensions are
that when the Critical extension is encountered but not recognized,
the message containing the extension MUST be silently discarded,
whereas when a Normal Vendor/Organization Specific Extension is
encountered but not recognized, the extension SHOULD be ignored, but
the rest of the Extensions and message data MUST still be processed.
Another difference between the two is that Critical
Vendor/Organization Extension has a length field of two octets and
the NVSE has a length field of only one octet.
2.1. Critical Vendor/Organization Specific Extension (CVSE)
The format of this extension is as shown below.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Reserved | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Vendor/Org-ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Vendor-CVSE-Type | Vendor-CVSE-Value ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: Critical Vendor/Organization Specific Extension
Type CVSE-TYPE-NUMBER 37
Reserved Reserved for future use. MUST be set to 0 on sending,
MUST be ignored on reception.
Length Length in bytes of this extension, not including the Type
and Length bytes.
Dommety & Leung Standards Track